Added a copy of design management app

This copy to be removed after feature flag removal

app/assets/javascripts/design_management/index.js

+// This application is being moved, please do not touch this files
+// Please see https://gitlab.com/gitlab-org/gitlab/-/issues/14744#note_364468096 for details
+
 import $ from 'jquery';
 import Vue from 'vue';
 import createRouter from './router';

app/assets/javascripts/design_management_new/components/app.vue

+<template>
+  <router-view />
+</template>

app/assets/javascripts/design_management_new/components/delete_button.vue

+<script>
+import { GlDeprecatedButton, GlModal, GlModalDirective } from '@gitlab/ui';
+import { uniqueId } from 'lodash';
+
+export default {
+  name: 'DeleteButton',
+  components: {
+    GlDeprecatedButton,
+    GlModal,
+  },
+  directives: {
+    GlModalDirective,
+  },
+  props: {
+    isDeleting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    buttonClass: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    buttonVariant: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    hasSelectedDesigns: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+  },
+  data() {
+    return {
+      modalId: uniqueId('design-deletion-confirmation-'),
+    };
+  },
+};
+</script>
+
+<template>
+  <div>
+    <gl-modal
+      :modal-id="modalId"
+      :title="s__('DesignManagement|Delete designs confirmation')"
+      :ok-title="s__('DesignManagement|Delete')"
+      ok-variant="danger"
+      @ok="$emit('deleteSelectedDesigns')"
+    >
+      <p>{{ s__('DesignManagement|Are you sure you want to delete the selected designs?') }}</p>
+    </gl-modal>
+    <gl-deprecated-button
+      v-gl-modal-directive="modalId"
+      :variant="buttonVariant"
+      :disabled="isDeleting || !hasSelectedDesigns"
+      :class="buttonClass"
+    >
+      <slot></slot>
+    </gl-deprecated-button>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_destroyer.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import destroyDesignMutation from '../graphql/mutations/destroy_design.mutation.graphql';
+import { updateStoreAfterDesignsDelete } from '../utils/cache_update';
+
+export default {
+  components: {
+    ApolloMutation,
+  },
+  props: {
+    filenames: {
+      type: Array,
+      required: true,
+    },
+    projectPath: {
+      type: String,
+      required: true,
+    },
+    iid: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    projectQueryBody() {
+      return {
+        query: getDesignListQuery,
+        variables: { fullPath: this.projectPath, iid: this.iid, atVersion: null },
+      };
+    },
+  },
+  methods: {
+    updateStoreAfterDelete(
+      store,
+      {
+        data: { designManagementDelete },
+      },
+    ) {
+      updateStoreAfterDesignsDelete(
+        store,
+        designManagementDelete,
+        this.projectQueryBody,
+        this.filenames,
+      );
+    },
+  },
+  destroyDesignMutation,
+};
+</script>
+
+<template>
+  <apollo-mutation
+    #default="{ mutate, loading, error }"
+    :mutation="$options.destroyDesignMutation"
+    :variables="{
+      filenames,
+      projectPath,
+      iid,
+    }"
+    :update="updateStoreAfterDelete"
+    v-on="$listeners"
+  >
+    <slot v-bind="{ mutate, loading, error }"></slot>
+  </apollo-mutation>
+</template>

app/assets/javascripts/design_management_new/components/design_note_pin.vue

+<script>
+import { __, sprintf } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+
+export default {
+  name: 'DesignNotePin',
+  components: {
+    Icon,
+  },
+  props: {
+    position: {
+      type: Object,
+      required: true,
+    },
+    label: {
+      type: Number,
+      required: false,
+      default: null,
+    },
+    repositioning: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+  computed: {
+    isNewNote() {
+      return this.label === null;
+    },
+    pinStyle() {
+      return this.repositioning ? { ...this.position, cursor: 'move' } : this.position;
+    },
+    pinLabel() {
+      return this.isNewNote
+        ? __('Comment form position')
+        : sprintf(__("Comment '%{label}' position"), { label: this.label });
+    },
+  },
+};
+</script>
+
+<template>
+  <button
+    :style="pinStyle"
+    :aria-label="pinLabel"
+    :class="{
+      'btn-transparent comment-indicator': isNewNote,
+      'js-image-badge badge badge-pill': !isNewNote,
+    }"
+    class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center"
+    type="button"
+    @mousedown="$emit('mousedown', $event)"
+    @mouseup="$emit('mouseup', $event)"
+    @click="$emit('click', $event)"
+  >
+    <icon v-if="isNewNote" name="image-comment-dark" />
+    <template v-else>
+      {{ label }}
+    </template>
+  </button>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_discussion.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import { GlTooltipDirective, GlIcon, GlLoadingIcon, GlLink } from '@gitlab/ui';
+import { s__ } from '~/locale';
+import ReplyPlaceholder from '~/notes/components/discussion_reply_placeholder.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import allVersionsMixin from '../../mixins/all_versions';
+import createNoteMutation from '../../graphql/mutations/create_note.mutation.graphql';
+import toggleResolveDiscussionMutation from '../../graphql/mutations/toggle_resolve_discussion.mutation.graphql';
+import getDesignQuery from '../../graphql/queries/get_design.query.graphql';
+import activeDiscussionQuery from '../../graphql/queries/active_discussion.query.graphql';
+import DesignNote from './design_note.vue';
+import DesignReplyForm from './design_reply_form.vue';
+import { updateStoreAfterAddDiscussionComment } from '../../utils/cache_update';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../../constants';
+import ToggleRepliesWidget from './toggle_replies_widget.vue';
+
+export default {
+  components: {
+    ApolloMutation,
+    DesignNote,
+    ReplyPlaceholder,
+    DesignReplyForm,
+    GlIcon,
+    GlLoadingIcon,
+    GlLink,
+    ToggleRepliesWidget,
+    TimeAgoTooltip,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  mixins: [allVersionsMixin],
+  props: {
+    discussion: {
+      type: Object,
+      required: true,
+    },
+    noteableId: {
+      type: String,
+      required: true,
+    },
+    designId: {
+      type: String,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+    discussionWithOpenForm: {
+      type: String,
+      required: true,
+    },
+  },
+  apollo: {
+    activeDiscussion: {
+      query: activeDiscussionQuery,
+      result({ data }) {
+        const discussionId = data.activeDiscussion.id;
+        if (this.discussion.resolved && !this.resolvedDiscussionsExpanded) {
+          return;
+        }
+        // We watch any changes to the active discussion from the design pins and scroll to this discussion if it exists
+        // We don't want scrollIntoView to be triggered from the discussion click itself
+        if (
+          discussionId &&
+          data.activeDiscussion.source === ACTIVE_DISCUSSION_SOURCE_TYPES.pin &&
+          discussionId === this.discussion.notes[0].id
+        ) {
+          this.$el.scrollIntoView({
+            behavior: 'smooth',
+            inline: 'start',
+          });
+        }
+      },
+    },
+  },
+  data() {
+    return {
+      discussionComment: '',
+      isFormRendered: false,
+      activeDiscussion: {},
+      isResolving: false,
+      shouldChangeResolvedStatus: false,
+      areRepliesCollapsed: this.discussion.resolved,
+    };
+  },
+  computed: {
+    mutationPayload() {
+      return {
+        noteableId: this.noteableId,
+        body: this.discussionComment,
+        discussionId: this.discussion.id,
+      };
+    },
+    designVariables() {
+      return {
+        fullPath: this.projectPath,
+        iid: this.issueIid,
+        filenames: [this.$route.params.id],
+        atVersion: this.designsVersion,
+      };
+    },
+    isDiscussionHighlighted() {
+      return this.discussion.notes[0].id === this.activeDiscussion.id;
+    },
+    resolveCheckboxText() {
+      return this.discussion.resolved
+        ? s__('DesignManagement|Unresolve thread')
+        : s__('DesignManagement|Resolve thread');
+    },
+    firstNote() {
+      return this.discussion.notes[0];
+    },
+    discussionReplies() {
+      return this.discussion.notes.slice(1);
+    },
+    areRepliesShown() {
+      return !this.discussion.resolved || !this.areRepliesCollapsed;
+    },
+    resolveIconName() {
+      return this.discussion.resolved ? 'check-circle-filled' : 'check-circle';
+    },
+    isRepliesWidgetVisible() {
+      return this.discussion.resolved && this.discussionReplies.length > 0;
+    },
+    isReplyPlaceholderVisible() {
+      return this.areRepliesShown || !this.discussionReplies.length;
+    },
+    isFormVisible() {
+      return this.isFormRendered && this.discussionWithOpenForm === this.discussion.id;
+    },
+  },
+  methods: {
+    addDiscussionComment(
+      store,
+      {
+        data: { createNote },
+      },
+    ) {
+      updateStoreAfterAddDiscussionComment(
+        store,
+        createNote,
+        getDesignQuery,
+        this.designVariables,
+        this.discussion.id,
+      );
+    },
+    onDone() {
+      this.discussionComment = '';
+      this.hideForm();
+      if (this.shouldChangeResolvedStatus) {
+        this.toggleResolvedStatus();
+      }
+    },
+    onCreateNoteError(err) {
+      this.$emit('createNoteError', err);
+    },
+    hideForm() {
+      this.isFormRendered = false;
+      this.discussionComment = '';
+    },
+    showForm() {
+      this.$emit('openForm', this.discussion.id);
+      this.isFormRendered = true;
+    },
+    toggleResolvedStatus() {
+      this.isResolving = true;
+      this.$apollo
+        .mutate({
+          mutation: toggleResolveDiscussionMutation,
+          variables: { id: this.discussion.id, resolve: !this.discussion.resolved },
+        })
+        .then(({ data }) => {
+          if (data.errors?.length > 0) {
+            this.$emit('resolveDiscussionError', data.errors[0]);
+          }
+        })
+        .catch(err => {
+          this.$emit('resolveDiscussionError', err);
+        })
+        .finally(() => {
+          this.isResolving = false;
+        });
+    },
+  },
+  createNoteMutation,
+};
+</script>
+
+<template>
+  <div class="design-discussion-wrapper">
+    <div
+      class="badge badge-pill gl-display-flex gl-align-items-center gl-justify-content-center"
+      :class="{ resolved: discussion.resolved }"
+      type="button"
+    >
+      {{ discussion.index }}
+    </div>
+    <ul
+      class="design-discussion bordered-box gl-relative gl-p-0 gl-list-style-none"
+      data-qa-selector="design_discussion_content"
+    >
+      <design-note
+        :note="firstNote"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-resolving="isResolving"
+        :class="{ 'gl-bg-blue-50': isDiscussionHighlighted }"
+        @error="$emit('updateNoteError', $event)"
+      >
+        <template v-if="discussion.resolvable" #resolveDiscussion>
+          <button
+            v-gl-tooltip
+            :class="{ 'is-active': discussion.resolved }"
+            :title="resolveCheckboxText"
+            :aria-label="resolveCheckboxText"
+            type="button"
+            class="line-resolve-btn note-action-button gl-mr-3"
+            data-testid="resolve-button"
+            @click.stop="toggleResolvedStatus"
+          >
+            <gl-icon v-if="!isResolving" :name="resolveIconName" data-testid="resolve-icon" />
+            <gl-loading-icon v-else inline />
+          </button>
+        </template>
+        <template v-if="discussion.resolved" #resolvedStatus>
+          <p class="gl-text-gray-700 gl-font-sm gl-m-0 gl-mt-5" data-testid="resolved-message">
+            {{ __('Resolved by') }}
+            <gl-link
+              class="gl-text-gray-700 gl-text-decoration-none gl-font-sm link-inherit-color"
+              :href="discussion.resolvedBy.webUrl"
+              target="_blank"
+              >{{ discussion.resolvedBy.name }}</gl-link
+            >
+            <time-ago-tooltip :time="discussion.resolvedAt" tooltip-placement="bottom" />
+          </p>
+        </template>
+      </design-note>
+      <toggle-replies-widget
+        v-if="isRepliesWidgetVisible"
+        :collapsed="areRepliesCollapsed"
+        :replies="discussionReplies"
+        @toggle="areRepliesCollapsed = !areRepliesCollapsed"
+      />
+      <design-note
+        v-for="note in discussionReplies"
+        v-show="areRepliesShown"
+        :key="note.id"
+        :note="note"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-resolving="isResolving"
+        :class="{ 'gl-bg-blue-50': isDiscussionHighlighted }"
+        @error="$emit('updateNoteError', $event)"
+      />
+      <li v-show="isReplyPlaceholderVisible" class="reply-wrapper">
+        <reply-placeholder
+          v-if="!isFormVisible"
+          class="qa-discussion-reply"
+          :button-text="__('Reply...')"
+          @onClick="showForm"
+        />
+        <apollo-mutation
+          v-else
+          #default="{ mutate, loading }"
+          :mutation="$options.createNoteMutation"
+          :variables="{
+            input: mutationPayload,
+          }"
+          :update="addDiscussionComment"
+          @done="onDone"
+          @error="onCreateNoteError"
+        >
+          <design-reply-form
+            v-model="discussionComment"
+            :is-saving="loading"
+            :markdown-preview-path="markdownPreviewPath"
+            @submitForm="mutate"
+            @cancelForm="hideForm"
+          >
+            <template v-if="discussion.resolvable" #resolveCheckbox>
+              <label data-testid="resolve-checkbox">
+                <input v-model="shouldChangeResolvedStatus" type="checkbox" />
+                {{ resolveCheckboxText }}
+              </label>
+            </template>
+          </design-reply-form>
+        </apollo-mutation>
+      </li>
+    </ul>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_note.vue

+<script>
+import { ApolloMutation } from 'vue-apollo';
+import { GlTooltipDirective, GlIcon } from '@gitlab/ui';
+import updateNoteMutation from '../../graphql/mutations/update_note.mutation.graphql';
+import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';
+import TimelineEntryItem from '~/vue_shared/components/notes/timeline_entry_item.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import DesignReplyForm from './design_reply_form.vue';
+import { findNoteId } from '../../utils/design_management_utils';
+import { hasErrors } from '../../utils/cache_update';
+
+export default {
+  components: {
+    UserAvatarLink,
+    TimelineEntryItem,
+    TimeAgoTooltip,
+    DesignReplyForm,
+    ApolloMutation,
+    GlIcon,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    note: {
+      type: Object,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      noteText: this.note.body,
+      isEditing: false,
+    };
+  },
+  computed: {
+    author() {
+      return this.note.author;
+    },
+    noteAnchorId() {
+      return findNoteId(this.note.id);
+    },
+    isNoteLinked() {
+      return this.$route.hash === `#note_${this.noteAnchorId}`;
+    },
+    mutationPayload() {
+      return {
+        id: this.note.id,
+        body: this.noteText,
+      };
+    },
+    isEditButtonVisible() {
+      return !this.isEditing && this.note.userPermissions.adminNote;
+    },
+  },
+  mounted() {
+    if (this.isNoteLinked) {
+      this.$refs.anchor.$el.scrollIntoView({ behavior: 'smooth', inline: 'start' });
+    }
+  },
+  methods: {
+    hideForm() {
+      this.isEditing = false;
+      this.noteText = this.note.body;
+    },
+    onDone({ data }) {
+      this.hideForm();
+      if (hasErrors(data.updateNote)) {
+        this.$emit('error', data.errors[0]);
+      }
+    },
+  },
+  updateNoteMutation,
+};
+</script>
+
+<template>
+  <timeline-entry-item :id="`note_${noteAnchorId}`" ref="anchor" class="design-note note-form">
+    <user-avatar-link
+      :link-href="author.webUrl"
+      :img-src="author.avatarUrl"
+      :img-alt="author.username"
+      :img-size="40"
+    />
+    <div class="d-flex justify-content-between">
+      <div>
+        <a
+          v-once
+          :href="author.webUrl"
+          class="js-user-link"
+          :data-user-id="author.id"
+          :data-username="author.username"
+        >
+          <span class="note-header-author-name bold">{{ author.name }}</span>
+          <span v-if="author.status_tooltip_html" v-html="author.status_tooltip_html"></span>
+          <span class="note-headline-light">@{{ author.username }}</span>
+        </a>
+        <span class="note-headline-light note-headline-meta">
+          <span class="system-note-message"> <slot></slot> </span>
+          <template v-if="note.createdAt">
+            <span class="system-note-separator"></span>
+            <a class="note-timestamp system-note-separator" :href="`#note_${noteAnchorId}`">
+              <time-ago-tooltip :time="note.createdAt" tooltip-placement="bottom" />
+            </a>
+          </template>
+        </span>
+      </div>
+      <div class="gl-display-flex">
+        <slot name="resolveDiscussion"></slot>
+        <button
+          v-if="isEditButtonVisible"
+          v-gl-tooltip
+          type="button"
+          :title="__('Edit comment')"
+          class="note-action-button js-note-edit btn btn-transparent qa-note-edit-button"
+          @click="isEditing = true"
+        >
+          <gl-icon name="pencil" class="link-highlight" />
+        </button>
+      </div>
+    </div>
+    <template v-if="!isEditing">
+      <div
+        class="note-text js-note-text md"
+        data-qa-selector="note_content"
+        v-html="note.bodyHtml"
+      ></div>
+      <slot name="resolvedStatus"></slot>
+    </template>
+    <apollo-mutation
+      v-else
+      #default="{ mutate, loading }"
+      :mutation="$options.updateNoteMutation"
+      :variables="{
+        input: mutationPayload,
+      }"
+      @error="$emit('error', $event)"
+      @done="onDone"
+    >
+      <design-reply-form
+        v-model="noteText"
+        :is-saving="loading"
+        :markdown-preview-path="markdownPreviewPath"
+        :is-new-comment="false"
+        class="mt-5"
+        @submitForm="mutate"
+        @cancelForm="hideForm"
+      />
+    </apollo-mutation>
+  </timeline-entry-item>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/design_reply_form.vue

+<script>
+import { GlDeprecatedButton, GlModal } from '@gitlab/ui';
+import MarkdownField from '~/vue_shared/components/markdown/field.vue';
+import { s__ } from '~/locale';
+
+export default {
+  name: 'DesignReplyForm',
+  components: {
+    MarkdownField,
+    GlDeprecatedButton,
+    GlModal,
+  },
+  props: {
+    markdownPreviewPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    value: {
+      type: String,
+      required: true,
+    },
+    isSaving: {
+      type: Boolean,
+      required: true,
+    },
+    isNewComment: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+  },
+  data() {
+    return {
+      formText: this.value,
+    };
+  },
+  computed: {
+    hasValue() {
+      return this.value.trim().length > 0;
+    },
+    modalSettings() {
+      if (this.isNewComment) {
+        return {
+          title: s__('DesignManagement|Cancel comment confirmation'),
+          okTitle: s__('DesignManagement|Discard comment'),
+          cancelTitle: s__('DesignManagement|Keep comment'),
+          content: s__('DesignManagement|Are you sure you want to cancel creating this comment?'),
+        };
+      }
+      return {
+        title: s__('DesignManagement|Cancel comment update confirmation'),
+        okTitle: s__('DesignManagement|Cancel changes'),
+        cancelTitle: s__('DesignManagement|Keep changes'),
+        content: s__('DesignManagement|Are you sure you want to cancel changes to this comment?'),
+      };
+    },
+    buttonText() {
+      return this.isNewComment
+        ? s__('DesignManagement|Comment')
+        : s__('DesignManagement|Save comment');
+    },
+  },
+  mounted() {
+    this.focusInput();
+  },
+  methods: {
+    submitForm() {
+      if (this.hasValue) this.$emit('submitForm');
+    },
+    cancelComment() {
+      if (this.hasValue && this.formText !== this.value) {
+        this.$refs.cancelCommentModal.show();
+      } else {
+        this.$emit('cancelForm');
+      }
+    },
+    focusInput() {
+      this.$refs.textarea.focus();
+    },
+  },
+};
+</script>
+
+<template>
+  <form class="new-note common-note-form" @submit.prevent>
+    <markdown-field
+      :markdown-preview-path="markdownPreviewPath"
+      :can-attach-file="false"
+      :enable-autocomplete="true"
+      :textarea-value="value"
+      markdown-docs-path="/help/user/markdown"
+      class="bordered-box"
+    >
+      <template #textarea>
+        <textarea
+          ref="textarea"
+          :value="value"
+          class="note-textarea js-gfm-input js-autosize markdown-area"
+          dir="auto"
+          data-supports-quick-actions="false"
+          data-qa-selector="note_textarea"
+          :aria-label="__('Description')"
+          :placeholder="__('Write a comment…')"
+          @input="$emit('input', $event.target.value)"
+          @keydown.meta.enter="submitForm"
+          @keydown.ctrl.enter="submitForm"
+          @keyup.esc.stop="cancelComment"
+        >
+        </textarea>
+      </template>
+    </markdown-field>
+    <slot name="resolveCheckbox"></slot>
+    <div class="note-form-actions gl-display-flex gl-justify-content-space-between">
+      <gl-deprecated-button
+        ref="submitButton"
+        :disabled="!hasValue || isSaving"
+        variant="success"
+        type="submit"
+        data-track-event="click_button"
+        data-qa-selector="save_comment_button"
+        @click="$emit('submitForm')"
+      >
+        {{ buttonText }}
+      </gl-deprecated-button>
+      <gl-deprecated-button ref="cancelButton" @click="cancelComment">{{
+        __('Cancel')
+      }}</gl-deprecated-button>
+    </div>
+    <gl-modal
+      ref="cancelCommentModal"
+      ok-variant="danger"
+      :title="modalSettings.title"
+      :ok-title="modalSettings.okTitle"
+      :cancel-title="modalSettings.cancelTitle"
+      modal-id="cancel-comment-modal"
+      @ok="$emit('cancelForm')"
+      >{{ modalSettings.content }}
+    </gl-modal>
+  </form>
+</template>

app/assets/javascripts/design_management_new/components/design_notes/toggle_replies_widget.vue

+<script>
+import { GlIcon, GlButton, GlLink } from '@gitlab/ui';
+import { __, n__ } from '~/locale';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+
+export default {
+  name: 'ToggleNotesWidget',
+  components: {
+    GlIcon,
+    GlButton,
+    GlLink,
+    TimeAgoTooltip,
+  },
+  props: {
+    collapsed: {
+      type: Boolean,
+      required: true,
+    },
+    replies: {
+      type: Array,
+      required: true,
+    },
+  },
+  computed: {
+    lastReply() {
+      return this.replies[this.replies.length - 1];
+    },
+    iconName() {
+      return this.collapsed ? 'chevron-right' : 'chevron-down';
+    },
+    toggleText() {
+      return this.collapsed
+        ? `${this.replies.length} ${n__('reply', 'replies', this.replies.length)}`
+        : __('Collapse replies');
+    },
+  },
+};
+</script>
+
+<template>
+  <li
+    class="toggle-comments gl-bg-gray-50 gl-display-flex gl-align-items-center gl-py-3"
+    :class="{ expanded: !collapsed }"
+    data-testid="toggle-comments-wrapper"
+  >
+    <gl-icon :name="iconName" class="gl-ml-3" @click.stop="$emit('toggle')" />
+    <gl-button
+      variant="link"
+      class="toggle-comments-button gl-ml-2 gl-mr-2"
+      @click.stop="$emit('toggle')"
+    >
+      {{ toggleText }}
+    </gl-button>
+    <template v-if="collapsed">
+      <span class="gl-text-gray-700">{{ __('Last reply by') }}</span>
+      <gl-link
+        :href="lastReply.author.webUrl"
+        target="_blank"
+        class="link-inherit-color gl-text-black-normal gl-text-decoration-none gl-font-weight-bold gl-ml-2 gl-mr-2"
+      >
+        {{ lastReply.author.name }}
+      </gl-link>
+      <time-ago-tooltip
+        :time="lastReply.createdAt"
+        tooltip-placement="bottom"
+        class="gl-text-gray-700"
+      />
+    </template>
+  </li>
+</template>

app/assets/javascripts/design_management_new/components/design_overlay.vue

+<script>
+import activeDiscussionQuery from '../graphql/queries/active_discussion.query.graphql';
+import updateActiveDiscussionMutation from '../graphql/mutations/update_active_discussion.mutation.graphql';
+import DesignNotePin from './design_note_pin.vue';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../constants';
+
+export default {
+  name: 'DesignOverlay',
+  components: {
+    DesignNotePin,
+  },
+  props: {
+    dimensions: {
+      type: Object,
+      required: true,
+    },
+    position: {
+      type: Object,
+      required: true,
+    },
+    notes: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    currentCommentForm: {
+      type: Object,
+      required: false,
+      default: null,
+    },
+    disableCommenting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  apollo: {
+    activeDiscussion: {
+      query: activeDiscussionQuery,
+    },
+  },
+  data() {
+    return {
+      movingNoteNewPosition: null,
+      movingNoteStartPosition: null,
+      activeDiscussion: {},
+    };
+  },
+  computed: {
+    overlayStyle() {
+      const cursor = this.disableCommenting ? 'unset' : undefined;
+
+      return {
+        cursor,
+        width: `${this.dimensions.width}px`,
+        height: `${this.dimensions.height}px`,
+        ...this.position,
+      };
+    },
+    isMovingCurrentComment() {
+      return Boolean(this.movingNoteStartPosition && !this.movingNoteStartPosition.noteId);
+    },
+    currentCommentPositionStyle() {
+      return this.isMovingCurrentComment && this.movingNoteNewPosition
+        ? this.getNotePositionStyle(this.movingNoteNewPosition)
+        : this.getNotePositionStyle(this.currentCommentForm);
+    },
+  },
+  methods: {
+    setNewNoteCoordinates({ x, y }) {
+      this.$emit('openCommentForm', { x, y });
+    },
+    getNoteRelativePosition(position) {
+      const { x, y, width, height } = position;
+      const widthRatio = this.dimensions.width / width;
+      const heightRatio = this.dimensions.height / height;
+      return {
+        left: Math.round(x * widthRatio),
+        top: Math.round(y * heightRatio),
+      };
+    },
+    getNotePositionStyle(position) {
+      const { left, top } = this.getNoteRelativePosition(position);
+      return {
+        left: `${left}px`,
+        top: `${top}px`,
+      };
+    },
+    getMovingNotePositionDelta(e) {
+      let deltaX = 0;
+      let deltaY = 0;
+
+      if (this.movingNoteStartPosition) {
+        const { clientX, clientY } = this.movingNoteStartPosition;
+        deltaX = e.clientX - clientX;
+        deltaY = e.clientY - clientY;
+      }
+
+      return {
+        deltaX,
+        deltaY,
+      };
+    },
+    isMovingNote(noteId) {
+      const movingNoteId = this.movingNoteStartPosition?.noteId;
+      return Boolean(movingNoteId && movingNoteId === noteId);
+    },
+    canMoveNote(note) {
+      const { userPermissions } = note;
+      const { adminNote } = userPermissions || {};
+
+      return Boolean(adminNote);
+    },
+    isPositionInOverlay(position) {
+      const { top, left } = this.getNoteRelativePosition(position);
+      const { height, width } = this.dimensions;
+
+      return top >= 0 && top <= height && left >= 0 && left <= width;
+    },
+    onNewNoteMove(e) {
+      if (!this.isMovingCurrentComment) return;
+
+      const { deltaX, deltaY } = this.getMovingNotePositionDelta(e);
+      const x = this.currentCommentForm.x + deltaX;
+      const y = this.currentCommentForm.y + deltaY;
+
+      const movingNoteNewPosition = {
+        x,
+        y,
+        width: this.dimensions.width,
+        height: this.dimensions.height,
+      };
+
+      if (!this.isPositionInOverlay(movingNoteNewPosition)) {
+        this.onNewNoteMouseup();
+        return;
+      }
+
+      this.movingNoteNewPosition = movingNoteNewPosition;
+    },
+    onExistingNoteMove(e) {
+      const note = this.notes.find(({ id }) => id === this.movingNoteStartPosition.noteId);
+      if (!note || !this.canMoveNote(note)) return;
+
+      const { position } = note;
+      const { width, height } = position;
+      const widthRatio = this.dimensions.width / width;
+      const heightRatio = this.dimensions.height / height;
+
+      const { deltaX, deltaY } = this.getMovingNotePositionDelta(e);
+      const x = position.x * widthRatio + deltaX;
+      const y = position.y * heightRatio + deltaY;
+
+      const movingNoteNewPosition = {
+        x,
+        y,
+        width: this.dimensions.width,
+        height: this.dimensions.height,
+      };
+
+      if (!this.isPositionInOverlay(movingNoteNewPosition)) {
+        this.onExistingNoteMouseup();
+        return;
+      }
+
+      this.movingNoteNewPosition = movingNoteNewPosition;
+    },
+    onNewNoteMouseup() {
+      if (!this.movingNoteNewPosition) return;
+
+      const { x, y } = this.movingNoteNewPosition;
+      this.setNewNoteCoordinates({ x, y });
+    },
+    onExistingNoteMouseup(note) {
+      if (!this.movingNoteStartPosition || !this.movingNoteNewPosition) {
+        this.updateActiveDiscussion(note.id);
+        this.$emit('closeCommentForm');
+        return;
+      }
+
+      const { x, y } = this.movingNoteNewPosition;
+      this.$emit('moveNote', {
+        noteId: this.movingNoteStartPosition.noteId,
+        discussionId: this.movingNoteStartPosition.discussionId,
+        coordinates: { x, y },
+      });
+    },
+    onNoteMousedown({ clientX, clientY }, note) {
+      this.movingNoteStartPosition = {
+        noteId: note?.id,
+        discussionId: note?.discussion.id,
+        clientX,
+        clientY,
+      };
+    },
+    onOverlayMousemove(e) {
+      if (!this.movingNoteStartPosition) return;
+
+      if (this.isMovingCurrentComment) {
+        this.onNewNoteMove(e);
+      } else {
+        this.onExistingNoteMove(e);
+      }
+    },
+    onNoteMouseup(note) {
+      if (!this.movingNoteStartPosition) return;
+
+      if (this.isMovingCurrentComment) {
+        this.onNewNoteMouseup();
+      } else {
+        this.onExistingNoteMouseup(note);
+      }
+
+      this.movingNoteStartPosition = null;
+      this.movingNoteNewPosition = null;
+    },
+    onAddCommentMouseup({ offsetX, offsetY }) {
+      if (this.disableCommenting) return;
+      if (this.activeDiscussion.id) {
+        this.updateActiveDiscussion();
+      }
+
+      this.setNewNoteCoordinates({ x: offsetX, y: offsetY });
+    },
+    updateActiveDiscussion(id) {
+      this.$apollo.mutate({
+        mutation: updateActiveDiscussionMutation,
+        variables: {
+          id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.pin,
+        },
+      });
+    },
+    isNoteInactive(note) {
+      return this.activeDiscussion.id && this.activeDiscussion.id !== note.id;
+    },
+    designPinClass(note) {
+      return { inactive: this.isNoteInactive(note), resolved: note.resolved };
+    },
+  },
+};
+</script>
+
+<template>
+  <div
+    class="position-absolute image-diff-overlay frame"
+    :style="overlayStyle"
+    @mousemove="onOverlayMousemove"
+    @mouseleave="onNoteMouseup"
+  >
+    <button
+      v-show="!disableCommenting"
+      type="button"
+      class="btn-transparent position-absolute image-diff-overlay-add-comment w-100 h-100 js-add-image-diff-note-button"
+      data-qa-selector="design_image_button"
+      @mouseup="onAddCommentMouseup"
+    ></button>
+    <template v-for="note in notes">
+      <design-note-pin
+        v-if="resolvedDiscussionsExpanded || !note.resolved"
+        :key="note.id"
+        :label="note.index"
+        :repositioning="isMovingNote(note.id)"
+        :position="
+          isMovingNote(note.id) && movingNoteNewPosition
+            ? getNotePositionStyle(movingNoteNewPosition)
+            : getNotePositionStyle(note.position)
+        "
+        :class="designPinClass(note)"
+        @mousedown.stop="onNoteMousedown($event, note)"
+        @mouseup.stop="onNoteMouseup(note)"
+      />
+    </template>
+
+    <design-note-pin
+      v-if="currentCommentForm"
+      :position="currentCommentPositionStyle"
+      :repositioning="isMovingCurrentComment"
+      @mousedown.stop="onNoteMousedown"
+      @mouseup.stop="onNoteMouseup"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_presentation.vue

+<script>
+import { throttle } from 'lodash';
+import DesignImage from './image.vue';
+import DesignOverlay from './design_overlay.vue';
+
+const CLICK_DRAG_BUFFER_PX = 2;
+
+export default {
+  components: {
+    DesignImage,
+    DesignOverlay,
+  },
+  props: {
+    image: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    imageName: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    discussions: {
+      type: Array,
+      required: true,
+    },
+    isAnnotating: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    scale: {
+      type: Number,
+      required: false,
+      default: 1,
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      overlayDimensions: null,
+      overlayPosition: null,
+      currentAnnotationPosition: null,
+      zoomFocalPoint: {
+        x: 0,
+        y: 0,
+        width: 0,
+        height: 0,
+      },
+      initialLoad: true,
+      lastDragPosition: null,
+      isDraggingDesign: false,
+    };
+  },
+  computed: {
+    discussionStartingNotes() {
+      return this.discussions.map(discussion => ({
+        ...discussion.notes[0],
+        index: discussion.index,
+      }));
+    },
+    currentCommentForm() {
+      return (this.isAnnotating && this.currentAnnotationPosition) || null;
+    },
+    presentationStyle() {
+      return {
+        cursor: this.isDraggingDesign ? 'grabbing' : undefined,
+      };
+    },
+  },
+  beforeDestroy() {
+    const { presentationViewport } = this.$refs;
+    if (!presentationViewport) return;
+
+    presentationViewport.removeEventListener('scroll', this.scrollThrottled, false);
+  },
+  mounted() {
+    const { presentationViewport } = this.$refs;
+    if (!presentationViewport) return;
+
+    this.scrollThrottled = throttle(() => {
+      this.shiftZoomFocalPoint();
+    }, 400);
+
+    presentationViewport.addEventListener('scroll', this.scrollThrottled, false);
+  },
+  methods: {
+    syncCurrentAnnotationPosition() {
+      if (!this.currentAnnotationPosition) return;
+
+      const widthRatio = this.overlayDimensions.width / this.currentAnnotationPosition.width;
+      const heightRatio = this.overlayDimensions.height / this.currentAnnotationPosition.height;
+      const x = this.currentAnnotationPosition.x * widthRatio;
+      const y = this.currentAnnotationPosition.y * heightRatio;
+
+      this.currentAnnotationPosition = this.getAnnotationPositon({ x, y });
+    },
+    setOverlayDimensions(overlayDimensions) {
+      this.overlayDimensions = overlayDimensions;
+
+      // every time we set overlay dimensions, we need to
+      // update the current annotation as well
+      this.syncCurrentAnnotationPosition();
+    },
+    setOverlayPosition() {
+      if (!this.overlayDimensions) {
+        this.overlayPosition = {};
+      }
+
+      const { presentationViewport } = this.$refs;
+      if (!presentationViewport) return;
+
+      // default to center
+      this.overlayPosition = {
+        left: `calc(50% - ${this.overlayDimensions.width / 2}px)`,
+        top: `calc(50% - ${this.overlayDimensions.height / 2}px)`,
+      };
+
+      // if the overlay overflows, then don't center
+      if (this.overlayDimensions.width > presentationViewport.offsetWidth) {
+        this.overlayPosition.left = '0';
+      }
+      if (this.overlayDimensions.height > presentationViewport.offsetHeight) {
+        this.overlayPosition.top = '0';
+      }
+    },
+    /**
+     * Return a point that represents the center of an
+     * overflowing child element w.r.t it's parent
+     */
+    getViewportCenter() {
+      const { presentationViewport } = this.$refs;
+      if (!presentationViewport) return {};
+
+      // get height of scroll bars (i.e. the max values for scrollTop, scrollLeft)
+      const scrollBarWidth = presentationViewport.scrollWidth - presentationViewport.offsetWidth;
+      const scrollBarHeight = presentationViewport.scrollHeight - presentationViewport.offsetHeight;
+
+      // determine how many child pixels have been scrolled
+      const xScrollRatio =
+        presentationViewport.scrollLeft > 0 ? presentationViewport.scrollLeft / scrollBarWidth : 0;
+      const yScrollRatio =
+        presentationViewport.scrollTop > 0 ? presentationViewport.scrollTop / scrollBarHeight : 0;
+      const xScrollOffset =
+        (presentationViewport.scrollWidth - presentationViewport.offsetWidth - 0) * xScrollRatio;
+      const yScrollOffset =
+        (presentationViewport.scrollHeight - presentationViewport.offsetHeight - 0) * yScrollRatio;
+
+      const viewportCenterX = presentationViewport.offsetWidth / 2;
+      const viewportCenterY = presentationViewport.offsetHeight / 2;
+      const focalPointX = viewportCenterX + xScrollOffset;
+      const focalPointY = viewportCenterY + yScrollOffset;
+
+      return {
+        x: focalPointX,
+        y: focalPointY,
+      };
+    },
+    /**
+     * Scroll the viewport such that the focal point is positioned centrally
+     */
+    scrollToFocalPoint() {
+      const { presentationViewport } = this.$refs;
+      if (!presentationViewport) return;
+
+      const scrollX = this.zoomFocalPoint.x - presentationViewport.offsetWidth / 2;
+      const scrollY = this.zoomFocalPoint.y - presentationViewport.offsetHeight / 2;
+
+      presentationViewport.scrollTo(scrollX, scrollY);
+    },
+    scaleZoomFocalPoint() {
+      const { x, y, width, height } = this.zoomFocalPoint;
+      const widthRatio = this.overlayDimensions.width / width;
+      const heightRatio = this.overlayDimensions.height / height;
+
+      this.zoomFocalPoint = {
+        x: Math.round(x * widthRatio * 100) / 100,
+        y: Math.round(y * heightRatio * 100) / 100,
+        ...this.overlayDimensions,
+      };
+    },
+    shiftZoomFocalPoint() {
+      this.zoomFocalPoint = {
+        ...this.getViewportCenter(),
+        ...this.overlayDimensions,
+      };
+    },
+    onImageResize(imageDimensions) {
+      this.setOverlayDimensions(imageDimensions);
+      this.setOverlayPosition();
+
+      this.$nextTick(() => {
+        if (this.initialLoad) {
+          // set focal point on initial load
+          this.shiftZoomFocalPoint();
+          this.initialLoad = false;
+        } else {
+          this.scaleZoomFocalPoint();
+          this.scrollToFocalPoint();
+        }
+      });
+    },
+    getAnnotationPositon(coordinates) {
+      const { x, y } = coordinates;
+      const { width, height } = this.overlayDimensions;
+      return {
+        x: Math.round(x),
+        y: Math.round(y),
+        width: Math.round(width),
+        height: Math.round(height),
+      };
+    },
+    openCommentForm(coordinates) {
+      this.currentAnnotationPosition = this.getAnnotationPositon(coordinates);
+      this.$emit('openCommentForm', this.currentAnnotationPosition);
+    },
+    closeCommentForm() {
+      this.currentAnnotationPosition = null;
+      this.$emit('closeCommentForm');
+    },
+    moveNote({ noteId, discussionId, coordinates }) {
+      const position = this.getAnnotationPositon(coordinates);
+      this.$emit('moveNote', { noteId, discussionId, position });
+    },
+    onPresentationMousedown({ clientX, clientY }) {
+      if (!this.isDesignOverflowing()) return;
+
+      this.lastDragPosition = {
+        x: clientX,
+        y: clientY,
+      };
+    },
+    getDragDelta(clientX, clientY) {
+      return {
+        deltaX: this.lastDragPosition.x - clientX,
+        deltaY: this.lastDragPosition.y - clientY,
+      };
+    },
+    exceedsDragThreshold(clientX, clientY) {
+      const { deltaX, deltaY } = this.getDragDelta(clientX, clientY);
+
+      return Math.abs(deltaX) > CLICK_DRAG_BUFFER_PX || Math.abs(deltaY) > CLICK_DRAG_BUFFER_PX;
+    },
+    shouldDragDesign(clientX, clientY) {
+      return (
+        this.lastDragPosition &&
+        (this.isDraggingDesign || this.exceedsDragThreshold(clientX, clientY))
+      );
+    },
+    onPresentationMousemove({ clientX, clientY }) {
+      const { presentationViewport } = this.$refs;
+      if (!presentationViewport || !this.shouldDragDesign(clientX, clientY)) return;
+
+      this.isDraggingDesign = true;
+
+      const { scrollLeft, scrollTop } = presentationViewport;
+      const { deltaX, deltaY } = this.getDragDelta(clientX, clientY);
+      presentationViewport.scrollTo(scrollLeft + deltaX, scrollTop + deltaY);
+
+      this.lastDragPosition = {
+        x: clientX,
+        y: clientY,
+      };
+    },
+    onPresentationMouseup() {
+      this.lastDragPosition = null;
+      this.isDraggingDesign = false;
+    },
+    isDesignOverflowing() {
+      const { presentationViewport } = this.$refs;
+      if (!presentationViewport) return false;
+
+      return (
+        presentationViewport.scrollWidth > presentationViewport.offsetWidth ||
+        presentationViewport.scrollHeight > presentationViewport.offsetHeight
+      );
+    },
+  },
+};
+</script>
+
+<template>
+  <div
+    ref="presentationViewport"
+    class="h-100 w-100 p-3 overflow-auto position-relative"
+    :style="presentationStyle"
+    @mousedown="onPresentationMousedown"
+    @mousemove="onPresentationMousemove"
+    @mouseup="onPresentationMouseup"
+    @mouseleave="onPresentationMouseup"
+    @touchstart="onPresentationMousedown"
+    @touchmove="onPresentationMousemove"
+    @touchend="onPresentationMouseup"
+    @touchcancel="onPresentationMouseup"
+  >
+    <div class="h-100 w-100 d-flex align-items-center position-relative">
+      <design-image
+        v-if="image"
+        :image="image"
+        :name="imageName"
+        :scale="scale"
+        @resize="onImageResize"
+      />
+      <design-overlay
+        v-if="overlayDimensions && overlayPosition"
+        :dimensions="overlayDimensions"
+        :position="overlayPosition"
+        :notes="discussionStartingNotes"
+        :current-comment-form="currentCommentForm"
+        :disable-commenting="isDraggingDesign"
+        :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+        @openCommentForm="openCommentForm"
+        @closeCommentForm="closeCommentForm"
+        @moveNote="moveNote"
+      />
+    </div>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_scaler.vue

+<script>
+import { GlIcon } from '@gitlab/ui';
+
+const SCALE_STEP_SIZE = 0.2;
+const DEFAULT_SCALE = 1;
+const MIN_SCALE = 1;
+const MAX_SCALE = 2;
+
+export default {
+  components: {
+    GlIcon,
+  },
+  data() {
+    return {
+      scale: DEFAULT_SCALE,
+    };
+  },
+  computed: {
+    disableReset() {
+      return this.scale <= MIN_SCALE;
+    },
+    disableDecrease() {
+      return this.scale === DEFAULT_SCALE;
+    },
+    disableIncrease() {
+      return this.scale >= MAX_SCALE;
+    },
+  },
+  methods: {
+    setScale(scale) {
+      if (scale < MIN_SCALE) {
+        return;
+      }
+
+      this.scale = Math.round(scale * 100) / 100;
+      this.$emit('scale', this.scale);
+    },
+    incrementScale() {
+      this.setScale(this.scale + SCALE_STEP_SIZE);
+    },
+    decrementScale() {
+      this.setScale(this.scale - SCALE_STEP_SIZE);
+    },
+    resetScale() {
+      this.setScale(DEFAULT_SCALE);
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="design-scaler btn-group" role="group">
+    <button class="btn" :disabled="disableDecrease" @click="decrementScale">
+      <span class="d-flex-center gl-icon s16">
+        –
+      </span>
+    </button>
+    <button class="btn" :disabled="disableReset" @click="resetScale">
+      <gl-icon name="redo" />
+    </button>
+    <button class="btn" :disabled="disableIncrease" @click="incrementScale">
+      <gl-icon name="plus" />
+    </button>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/design_sidebar.vue

+<script>
+import { s__ } from '~/locale';
+import Cookies from 'js-cookie';
+import { parseBoolean } from '~/lib/utils/common_utils';
+import { GlCollapse, GlButton, GlPopover } from '@gitlab/ui';
+import updateActiveDiscussionMutation from '../graphql/mutations/update_active_discussion.mutation.graphql';
+import { extractDiscussions, extractParticipants } from '../utils/design_management_utils';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../constants';
+import DesignDiscussion from './design_notes/design_discussion.vue';
+import Participants from '~/sidebar/components/participants/participants.vue';
+
+export default {
+  components: {
+    DesignDiscussion,
+    Participants,
+    GlCollapse,
+    GlButton,
+    GlPopover,
+  },
+  props: {
+    design: {
+      type: Object,
+      required: true,
+    },
+    resolvedDiscussionsExpanded: {
+      type: Boolean,
+      required: true,
+    },
+    markdownPreviewPath: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      isResolvedCommentsPopoverHidden: parseBoolean(Cookies.get(this.$options.cookieKey)),
+      discussionWithOpenForm: '',
+    };
+  },
+  computed: {
+    discussions() {
+      return extractDiscussions(this.design.discussions);
+    },
+    issue() {
+      return {
+        ...this.design.issue,
+        webPath: this.design.issue.webPath.substr(1),
+      };
+    },
+    discussionParticipants() {
+      return extractParticipants(this.issue.participants);
+    },
+    resolvedDiscussions() {
+      return this.discussions.filter(discussion => discussion.resolved);
+    },
+    unresolvedDiscussions() {
+      return this.discussions.filter(discussion => !discussion.resolved);
+    },
+    resolvedCommentsToggleIcon() {
+      return this.resolvedDiscussionsExpanded ? 'chevron-down' : 'chevron-right';
+    },
+  },
+  methods: {
+    handleSidebarClick() {
+      this.isResolvedCommentsPopoverHidden = true;
+      Cookies.set(this.$options.cookieKey, 'true', { expires: 365 * 10 });
+      this.updateActiveDiscussion();
+    },
+    updateActiveDiscussion(id) {
+      this.$apollo.mutate({
+        mutation: updateActiveDiscussionMutation,
+        variables: {
+          id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.discussion,
+        },
+      });
+    },
+    closeCommentForm() {
+      this.comment = '';
+      this.$emit('closeCommentForm');
+    },
+    updateDiscussionWithOpenForm(id) {
+      this.discussionWithOpenForm = id;
+    },
+  },
+  resolveCommentsToggleText: s__('DesignManagement|Resolved Comments'),
+  cookieKey: 'hide_design_resolved_comments_popover',
+};
+</script>
+
+<template>
+  <div class="image-notes" @click="handleSidebarClick">
+    <h2 class="gl-font-weight-bold gl-mt-0">
+      {{ issue.title }}
+    </h2>
+    <a
+      class="gl-text-gray-600 gl-text-decoration-none gl-mb-6 gl-display-block"
+      :href="issue.webUrl"
+      >{{ issue.webPath }}</a
+    >
+    <participants
+      :participants="discussionParticipants"
+      :show-participant-label="false"
+      class="gl-mb-4"
+    />
+    <h2
+      v-if="unresolvedDiscussions.length === 0"
+      class="new-discussion-disclaimer gl-font-base gl-m-0 gl-mb-4"
+      data-testid="new-discussion-disclaimer"
+    >
+      {{ s__("DesignManagement|Click the image where you'd like to start a new discussion") }}
+    </h2>
+    <design-discussion
+      v-for="discussion in unresolvedDiscussions"
+      :key="discussion.id"
+      :discussion="discussion"
+      :design-id="$route.params.id"
+      :noteable-id="design.id"
+      :markdown-preview-path="markdownPreviewPath"
+      :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+      :discussion-with-open-form="discussionWithOpenForm"
+      data-testid="unresolved-discussion"
+      @createNoteError="$emit('onDesignDiscussionError', $event)"
+      @updateNoteError="$emit('updateNoteError', $event)"
+      @resolveDiscussionError="$emit('resolveDiscussionError', $event)"
+      @click.native.stop="updateActiveDiscussion(discussion.notes[0].id)"
+      @openForm="updateDiscussionWithOpenForm"
+    />
+    <template v-if="resolvedDiscussions.length > 0">
+      <gl-button
+        id="resolved-comments"
+        data-testid="resolved-comments"
+        :icon="resolvedCommentsToggleIcon"
+        variant="link"
+        class="link-inherit-color gl-text-black-normal gl-text-decoration-none gl-font-weight-bold gl-mb-4"
+        @click="$emit('toggleResolvedComments')"
+        >{{ $options.resolveCommentsToggleText }} ({{ resolvedDiscussions.length }})
+      </gl-button>
+      <gl-popover
+        v-if="!isResolvedCommentsPopoverHidden"
+        :show="!isResolvedCommentsPopoverHidden"
+        target="resolved-comments"
+        container="popovercontainer"
+        placement="top"
+        :title="s__('DesignManagement|Resolved Comments')"
+      >
+        <p>
+          {{
+            s__(
+              'DesignManagement|Comments you resolve can be viewed and unresolved by going to the "Resolved Comments" section below',
+            )
+          }}
+        </p>
+        <a href="#" rel="noopener noreferrer" target="_blank">{{
+          s__('DesignManagement|Learn more about resolving comments')
+        }}</a>
+      </gl-popover>
+      <gl-collapse :visible="resolvedDiscussionsExpanded" class="gl-mt-3">
+        <design-discussion
+          v-for="discussion in resolvedDiscussions"
+          :key="discussion.id"
+          :discussion="discussion"
+          :design-id="$route.params.id"
+          :noteable-id="design.id"
+          :markdown-preview-path="markdownPreviewPath"
+          :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+          :discussion-with-open-form="discussionWithOpenForm"
+          data-testid="resolved-discussion"
+          @error="$emit('onDesignDiscussionError', $event)"
+          @updateNoteError="$emit('updateNoteError', $event)"
+          @openForm="updateDiscussionWithOpenForm"
+          @click.native.stop="updateActiveDiscussion(discussion.notes[0].id)"
+        />
+      </gl-collapse>
+    </template>
+    <slot name="replyForm"></slot>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/image.vue

+<script>
+import { throttle } from 'lodash';
+import { GlIcon } from '@gitlab/ui';
+
+export default {
+  components: {
+    GlIcon,
+  },
+  props: {
+    image: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    name: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    scale: {
+      type: Number,
+      required: false,
+      default: 1,
+    },
+  },
+  data() {
+    return {
+      baseImageSize: null,
+      imageStyle: null,
+      imageError: false,
+    };
+  },
+  watch: {
+    scale(val) {
+      this.zoom(val);
+    },
+  },
+  beforeDestroy() {
+    window.removeEventListener('resize', this.resizeThrottled, false);
+  },
+  mounted() {
+    this.onImgLoad();
+
+    this.resizeThrottled = throttle(() => {
+      // NOTE: if imageStyle is set, then baseImageSize
+      // won't change due to resize. We must still emit a
+      // `resize` event so that the parent can handle
+      // resizes appropriately (e.g. for design_overlay)
+      this.setBaseImageSize();
+    }, 400);
+    window.addEventListener('resize', this.resizeThrottled, false);
+  },
+  methods: {
+    onImgLoad() {
+      requestIdleCallback(this.setBaseImageSize, { timeout: 1000 });
+    },
+    onImgError() {
+      this.imageError = true;
+    },
+    setBaseImageSize() {
+      const { contentImg } = this.$refs;
+      if (!contentImg || contentImg.offsetHeight === 0 || contentImg.offsetWidth === 0) return;
+
+      this.baseImageSize = {
+        height: contentImg.offsetHeight,
+        width: contentImg.offsetWidth,
+      };
+      this.onResize({ width: this.baseImageSize.width, height: this.baseImageSize.height });
+    },
+    onResize({ width, height }) {
+      this.$emit('resize', { width, height });
+    },
+    zoom(amount) {
+      if (amount === 1) {
+        this.imageStyle = null;
+        this.$nextTick(() => {
+          this.setBaseImageSize();
+        });
+        return;
+      }
+      const width = this.baseImageSize.width * amount;
+      const height = this.baseImageSize.height * amount;
+
+      this.imageStyle = {
+        width: `${width}px`,
+        height: `${height}px`,
+      };
+
+      this.onResize({ width, height });
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="m-auto js-design-image">
+    <gl-icon v-if="imageError" class="text-secondary-100" name="media-broken" :size="48" />
+    <img
+      v-show="!imageError"
+      ref="contentImg"
+      class="mh-100"
+      :src="image"
+      :alt="name"
+      :style="imageStyle"
+      :class="{ 'img-fluid': !imageStyle }"
+      @error="onImgError"
+      @load="onImgLoad"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/list/item.vue

+<script>
+import { GlLoadingIcon, GlIcon, GlIntersectionObserver } from '@gitlab/ui';
+import Icon from '~/vue_shared/components/icon.vue';
+import Timeago from '~/vue_shared/components/time_ago_tooltip.vue';
+import { n__, __ } from '~/locale';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    GlLoadingIcon,
+    GlIntersectionObserver,
+    GlIcon,
+    Icon,
+    Timeago,
+  },
+  props: {
+    id: {
+      type: [Number, String],
+      required: true,
+    },
+    event: {
+      type: String,
+      required: true,
+    },
+    notesCount: {
+      type: Number,
+      required: true,
+    },
+    image: {
+      type: String,
+      required: true,
+    },
+    filename: {
+      type: String,
+      required: true,
+    },
+    updatedAt: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    isUploading: {
+      type: Boolean,
+      required: false,
+      default: true,
+    },
+    imageV432x230: {
+      type: String,
+      required: false,
+      default: null,
+    },
+  },
+  data() {
+    return {
+      imageLoading: true,
+      imageError: false,
+      wasInView: false,
+    };
+  },
+  computed: {
+    icon() {
+      const normalizedEvent = this.event.toLowerCase();
+      const icons = {
+        creation: {
+          name: 'file-addition-solid',
+          classes: 'text-success-500',
+          tooltip: __('Added in this version'),
+        },
+        modification: {
+          name: 'file-modified-solid',
+          classes: 'text-primary-500',
+          tooltip: __('Modified in this version'),
+        },
+        deletion: {
+          name: 'file-deletion-solid',
+          classes: 'text-danger-500',
+          tooltip: __('Deleted in this version'),
+        },
+      };
+
+      return icons[normalizedEvent] ? icons[normalizedEvent] : {};
+    },
+    notesLabel() {
+      return n__('%d comment', '%d comments', this.notesCount);
+    },
+    imageLink() {
+      return this.wasInView ? this.imageV432x230 || this.image : '';
+    },
+    showLoadingSpinner() {
+      return this.imageLoading || this.isUploading;
+    },
+    showImageErrorIcon() {
+      return this.wasInView && this.imageError;
+    },
+    showImage() {
+      return !this.showLoadingSpinner && !this.showImageErrorIcon;
+    },
+  },
+  methods: {
+    onImageLoad() {
+      this.imageLoading = false;
+      this.imageError = false;
+    },
+    onImageError() {
+      this.imageLoading = false;
+      this.imageError = true;
+    },
+    onAppear() {
+      // do nothing if image has previously
+      // been in view
+      if (this.wasInView) {
+        return;
+      }
+
+      this.wasInView = true;
+      this.imageLoading = true;
+    },
+  },
+  DESIGN_ROUTE_NAME,
+};
+</script>
+
+<template>
+  <router-link
+    :to="{
+      name: $options.DESIGN_ROUTE_NAME,
+      params: { id: filename },
+      query: $route.query,
+    }"
+    class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  >
+    <div class="card-body p-0 d-flex-center overflow-hidden position-relative">
+      <div v-if="icon.name" class="design-event position-absolute">
+        <span :title="icon.tooltip" :aria-label="icon.tooltip">
+          <icon :name="icon.name" :size="18" :class="icon.classes" />
+        </span>
+      </div>
+      <gl-intersection-observer @appear="onAppear">
+        <gl-loading-icon v-if="showLoadingSpinner" size="md" />
+        <gl-icon
+          v-else-if="showImageErrorIcon"
+          name="media-broken"
+          class="text-secondary"
+          :size="32"
+        />
+        <img
+          v-show="showImage"
+          :src="imageLink"
+          :alt="filename"
+          class="block mx-auto mw-100 mh-100 design-img"
+          data-qa-selector="design_image"
+          @load="onImageLoad"
+          @error="onImageError"
+        />
+      </gl-intersection-observer>
+    </div>
+    <div class="card-footer d-flex w-100">
+      <div class="d-flex flex-column str-truncated-100">
+        <span class="bold str-truncated-100" data-qa-selector="design_file_name">{{
+          filename
+        }}</span>
+        <span v-if="updatedAt" class="str-truncated-100">
+          {{ __('Updated') }} <timeago :time="updatedAt" tooltip-placement="bottom" />
+        </span>
+      </div>
+      <div v-if="notesCount" class="ml-auto d-flex align-items-center text-secondary">
+        <icon name="comments" class="ml-1" />
+        <span :aria-label="notesLabel" class="ml-1">
+          {{ notesCount }}
+        </span>
+      </div>
+    </div>
+  </router-link>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/index.vue

+<script>
+import { GlDeprecatedButton } from '@gitlab/ui';
+import { __, sprintf } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+import timeagoMixin from '~/vue_shared/mixins/timeago';
+import Pagination from './pagination.vue';
+import DeleteButton from '../delete_button.vue';
+import permissionsQuery from '../../graphql/queries/design_permissions.query.graphql';
+import appDataQuery from '../../graphql/queries/app_data.query.graphql';
+import { DESIGNS_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    Icon,
+    Pagination,
+    DeleteButton,
+    GlDeprecatedButton,
+  },
+  mixins: [timeagoMixin],
+  props: {
+    id: {
+      type: String,
+      required: true,
+    },
+    isDeleting: {
+      type: Boolean,
+      required: true,
+    },
+    filename: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    updatedAt: {
+      type: String,
+      required: false,
+      default: null,
+    },
+    updatedBy: {
+      type: Object,
+      required: false,
+      default: () => ({}),
+    },
+    isLatestVersion: {
+      type: Boolean,
+      required: true,
+    },
+    image: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      permissions: {
+        createDesign: false,
+      },
+      projectPath: '',
+      issueIid: null,
+    };
+  },
+  apollo: {
+    appData: {
+      query: appDataQuery,
+      manual: true,
+      result({ data: { projectPath, issueIid } }) {
+        this.projectPath = projectPath;
+        this.issueIid = issueIid;
+      },
+    },
+    permissions: {
+      query: permissionsQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+        };
+      },
+      update: data => data.project.issue.userPermissions,
+    },
+  },
+  computed: {
+    updatedText() {
+      return sprintf(__('Updated %{updated_at} by %{updated_by}'), {
+        updated_at: this.timeFormatted(this.updatedAt),
+        updated_by: this.updatedBy.name,
+      });
+    },
+    canDeleteDesign() {
+      return this.permissions.createDesign;
+    },
+  },
+  DESIGNS_ROUTE_NAME,
+};
+</script>
+
+<template>
+  <header class="d-flex p-2 bg-white align-items-center js-design-header">
+    <router-link
+      :to="{
+        name: $options.DESIGNS_ROUTE_NAME,
+        query: $route.query,
+      }"
+      :aria-label="s__('DesignManagement|Go back to designs')"
+      class="mr-3 text-plain d-flex justify-content-center align-items-center"
+    >
+      <icon :size="18" name="close" />
+    </router-link>
+    <div class="overflow-hidden d-flex align-items-center">
+      <h2 class="m-0 str-truncated-100 gl-font-base">{{ filename }}</h2>
+      <small v-if="updatedAt" class="text-secondary">{{ updatedText }}</small>
+    </div>
+    <pagination :id="id" class="ml-auto flex-shrink-0" />
+    <gl-deprecated-button :href="image" class="mr-2">
+      <icon :size="18" name="download" />
+    </gl-deprecated-button>
+    <delete-button
+      v-if="isLatestVersion && canDeleteDesign"
+      :is-deleting="isDeleting"
+      button-variant="danger"
+      @deleteSelectedDesigns="$emit('delete')"
+    >
+      <icon :size="18" name="remove" />
+    </delete-button>
+  </header>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/pagination.vue

+<script>
+/* global Mousetrap */
+import 'mousetrap';
+import { s__, sprintf } from '~/locale';
+import PaginationButton from './pagination_button.vue';
+import allDesignsMixin from '../../mixins/all_designs';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    PaginationButton,
+  },
+  mixins: [allDesignsMixin],
+  props: {
+    id: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    designsCount() {
+      return this.designs.length;
+    },
+    currentIndex() {
+      return this.designs.findIndex(design => design.filename === this.id);
+    },
+    paginationText() {
+      return sprintf(s__('DesignManagement|%{current_design} of %{designs_count}'), {
+        current_design: this.currentIndex + 1,
+        designs_count: this.designsCount,
+      });
+    },
+    previousDesign() {
+      if (!this.designsCount) return null;
+
+      return this.designs[this.currentIndex - 1];
+    },
+    nextDesign() {
+      if (!this.designsCount) return null;
+
+      return this.designs[this.currentIndex + 1];
+    },
+  },
+  mounted() {
+    Mousetrap.bind('left', () => this.navigateToDesign(this.previousDesign));
+    Mousetrap.bind('right', () => this.navigateToDesign(this.nextDesign));
+  },
+  beforeDestroy() {
+    Mousetrap.unbind(['left', 'right'], this.navigateToDesign);
+  },
+  methods: {
+    navigateToDesign(design) {
+      if (design) {
+        this.$router.push({
+          name: DESIGN_ROUTE_NAME,
+          params: { id: design.filename },
+          query: this.$route.query,
+        });
+      }
+    },
+  },
+};
+</script>
+
+<template>
+  <div v-if="designsCount" class="d-flex align-items-center">
+    {{ paginationText }}
+    <div class="btn-group ml-3 mr-3">
+      <pagination-button
+        :design="previousDesign"
+        :title="s__('DesignManagement|Go to previous design')"
+        icon-name="angle-left"
+        class="js-previous-design"
+      />
+      <pagination-button
+        :design="nextDesign"
+        :title="s__('DesignManagement|Go to next design')"
+        icon-name="angle-right"
+        class="js-next-design"
+      />
+    </div>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/toolbar/pagination_button.vue

+<script>
+import Icon from '~/vue_shared/components/icon.vue';
+import { DESIGN_ROUTE_NAME } from '../../router/constants';
+
+export default {
+  components: {
+    Icon,
+  },
+  props: {
+    design: {
+      type: Object,
+      required: false,
+      default: null,
+    },
+    title: {
+      type: String,
+      required: true,
+    },
+    iconName: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    designLink() {
+      if (!this.design) return {};
+
+      return {
+        name: DESIGN_ROUTE_NAME,
+        params: { id: this.design.filename },
+        query: this.$route.query,
+      };
+    },
+  },
+};
+</script>
+
+<template>
+  <router-link
+    :to="designLink"
+    :disabled="!design"
+    :class="{ disabled: !design }"
+    :aria-label="title"
+    class="btn btn-default"
+  >
+    <icon :name="iconName" />
+  </router-link>
+</template>

app/assets/javascripts/design_management_new/components/upload/button.vue

+<script>
+import { GlDeprecatedButton, GlLoadingIcon, GlTooltipDirective } from '@gitlab/ui';
+import { VALID_DESIGN_FILE_MIMETYPE } from '../../constants';
+
+export default {
+  components: {
+    GlDeprecatedButton,
+    GlLoadingIcon,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    isSaving: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  methods: {
+    openFileUpload() {
+      this.$refs.fileUpload.click();
+    },
+    onFileUploadChange(e) {
+      this.$emit('upload', e.target.files);
+    },
+  },
+  VALID_DESIGN_FILE_MIMETYPE,
+};
+</script>
+
+<template>
+  <div>
+    <gl-deprecated-button
+      v-gl-tooltip.hover
+      :title="
+        s__(
+          'DesignManagement|Adding a design with the same filename replaces the file in a new version.',
+        )
+      "
+      :disabled="isSaving"
+      variant="success"
+      @click="openFileUpload"
+    >
+      {{ s__('DesignManagement|Upload designs') }}
+      <gl-loading-icon v-if="isSaving" inline class="ml-1" />
+    </gl-deprecated-button>
+
+    <input
+      ref="fileUpload"
+      type="file"
+      name="design_file"
+      :accept="$options.VALID_DESIGN_FILE_MIMETYPE.mimetype"
+      class="hide"
+      multiple
+      @change="onFileUploadChange"
+    />
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/upload/design_dropzone.vue

+<script>
+import { GlIcon, GlLink, GlSprintf } from '@gitlab/ui';
+import createFlash from '~/flash';
+import uploadDesignMutation from '../../graphql/mutations/upload_design.mutation.graphql';
+import { UPLOAD_DESIGN_INVALID_FILETYPE_ERROR } from '../../utils/error_messages';
+import { isValidDesignFile } from '../../utils/design_management_utils';
+import { VALID_DATA_TRANSFER_TYPE, VALID_DESIGN_FILE_MIMETYPE } from '../../constants';
+
+export default {
+  components: {
+    GlIcon,
+    GlLink,
+    GlSprintf,
+  },
+  data() {
+    return {
+      dragCounter: 0,
+      isDragDataValid: false,
+    };
+  },
+  computed: {
+    dragging() {
+      return this.dragCounter !== 0;
+    },
+  },
+  methods: {
+    isValidUpload(files) {
+      return files.every(isValidDesignFile);
+    },
+    isValidDragDataType({ dataTransfer }) {
+      return Boolean(dataTransfer && dataTransfer.types.some(t => t === VALID_DATA_TRANSFER_TYPE));
+    },
+    ondrop({ dataTransfer = {} }) {
+      this.dragCounter = 0;
+      // User already had feedback when dropzone was active, so bail here
+      if (!this.isDragDataValid) {
+        return;
+      }
+
+      const { files } = dataTransfer;
+      if (!this.isValidUpload(Array.from(files))) {
+        createFlash(UPLOAD_DESIGN_INVALID_FILETYPE_ERROR);
+        return;
+      }
+
+      this.$emit('change', files);
+    },
+    ondragenter(e) {
+      this.dragCounter += 1;
+      this.isDragDataValid = this.isValidDragDataType(e);
+    },
+    ondragleave() {
+      this.dragCounter -= 1;
+    },
+    openFileUpload() {
+      this.$refs.fileUpload.click();
+    },
+    onDesignInputChange(e) {
+      this.$emit('change', e.target.files);
+    },
+  },
+  uploadDesignMutation,
+  VALID_DESIGN_FILE_MIMETYPE,
+};
+</script>
+
+<template>
+  <div
+    class="w-100 position-relative"
+    @dragstart.prevent.stop
+    @dragend.prevent.stop
+    @dragover.prevent.stop
+    @dragenter.prevent.stop="ondragenter"
+    @dragleave.prevent.stop="ondragleave"
+    @drop.prevent.stop="ondrop"
+  >
+    <slot>
+      <button
+        class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+        @click="openFileUpload"
+      >
+        <div class="d-flex-center flex-column text-center">
+          <gl-icon name="doc-new" :size="48" class="mb-4" />
+          <p>
+            <gl-sprintf
+              :message="
+                __(
+                  '%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}.',
+                )
+              "
+            >
+              <template #lineOne="{ content }"
+                ><span class="d-block">{{ content }}</span>
+              </template>
+
+              <template #link="{ content }">
+                <gl-link class="h-100 w-100" @click.stop="openFileUpload">{{ content }}</gl-link>
+              </template>
+            </gl-sprintf>
+          </p>
+        </div>
+      </button>
+
+      <input
+        ref="fileUpload"
+        type="file"
+        name="design_file"
+        :accept="$options.VALID_DESIGN_FILE_MIMETYPE.mimetype"
+        class="hide"
+        multiple
+        @change="onDesignInputChange"
+      />
+    </slot>
+    <transition name="design-dropzone-fade">
+      <div
+        v-show="dragging"
+        class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      >
+        <div v-show="!isDragDataValid" class="mw-50 text-center">
+          <h3>{{ __('Oh no!') }}</h3>
+          <span>{{
+            __(
+              'You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.',
+            )
+          }}</span>
+        </div>
+        <div v-show="isDragDataValid" class="mw-50 text-center">
+          <h3>{{ __('Incoming!') }}</h3>
+          <span>{{ __('Drop your designs to start your upload.') }}</span>
+        </div>
+      </div>
+    </transition>
+  </div>
+</template>

app/assets/javascripts/design_management_new/components/upload/design_version_dropdown.vue

+<script>
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import { __, sprintf } from '~/locale';
+import allVersionsMixin from '../../mixins/all_versions';
+import { findVersionId } from '../../utils/design_management_utils';
+
+export default {
+  components: {
+    GlDropdown,
+    GlDropdownItem,
+  },
+  mixins: [allVersionsMixin],
+  computed: {
+    queryVersion() {
+      return this.$route.query.version;
+    },
+    currentVersionIdx() {
+      if (!this.queryVersion) return 0;
+
+      const idx = this.allVersions.findIndex(
+        version => this.findVersionId(version.node.id) === this.queryVersion,
+      );
+
+      // if the currentVersionId isn't a valid version (i.e. not in allVersions)
+      // then return the latest version (index 0)
+      return idx !== -1 ? idx : 0;
+    },
+    currentVersionId() {
+      if (this.queryVersion) return this.queryVersion;
+
+      const currentVersion = this.allVersions[this.currentVersionIdx];
+      return this.findVersionId(currentVersion.node.id);
+    },
+    dropdownText() {
+      if (this.isLatestVersion) {
+        return __('Showing Latest Version');
+      }
+      // allVersions is sorted in reverse chronological order (latest first)
+      const currentVersionNumber = this.allVersions.length - this.currentVersionIdx;
+
+      return sprintf(__('Showing Version #%{versionNumber}'), {
+        versionNumber: currentVersionNumber,
+      });
+    },
+  },
+  methods: {
+    findVersionId,
+  },
+};
+</script>
+
+<template>
+  <gl-dropdown :text="dropdownText" variant="link" class="design-version-dropdown">
+    <gl-dropdown-item v-for="(version, index) in allVersions" :key="version.node.id">
+      <router-link
+        class="d-flex js-version-link"
+        :to="{ path: $route.path, query: { version: findVersionId(version.node.id) } }"
+      >
+        <div class="flex-grow-1 ml-2">
+          <div>
+            <strong
+              >{{ __('Version') }} {{ allVersions.length - index }}
+              <span v-if="findVersionId(version.node.id) === latestVersionId"
+                >({{ __('latest') }})</span
+              >
+            </strong>
+          </div>
+        </div>
+        <i
+          v-if="findVersionId(version.node.id) === currentVersionId"
+          class="fa fa-check pull-right"
+        ></i>
+      </router-link>
+    </gl-dropdown-item>
+  </gl-dropdown>
+</template>

app/assets/javascripts/design_management_new/constants.js

+// WARNING: replace this with something
+// more sensical as per https://gitlab.com/gitlab-org/gitlab/issues/118611
+export const VALID_DESIGN_FILE_MIMETYPE = {
+  mimetype: 'image/*',
+  regex: /image\/.+/,
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/API/DataTransfer/types
+export const VALID_DATA_TRANSFER_TYPE = 'Files';
+
+export const ACTIVE_DISCUSSION_SOURCE_TYPES = {
+  pin: 'pin',
+  discussion: 'discussion',
+};
+
+export const DESIGN_DETAIL_LAYOUT_CLASSLIST = ['design-detail-layout', 'overflow-hidden', 'm-0'];

app/assets/javascripts/design_management_new/graphql.js

+import Vue from 'vue';
+import VueApollo from 'vue-apollo';
+import { uniqueId } from 'lodash';
+import { defaultDataIdFromObject } from 'apollo-cache-inmemory';
+import createDefaultClient from '~/lib/graphql';
+import activeDiscussionQuery from './graphql/queries/active_discussion.query.graphql';
+import typeDefs from './graphql/typedefs.graphql';
+
+Vue.use(VueApollo);
+
+const resolvers = {
+  Mutation: {
+    updateActiveDiscussion: (_, { id = null, source }, { cache }) => {
+      const data = cache.readQuery({ query: activeDiscussionQuery });
+      data.activeDiscussion = {
+        __typename: 'ActiveDiscussion',
+        id,
+        source,
+      };
+      cache.writeQuery({ query: activeDiscussionQuery, data });
+    },
+  },
+};
+
+const defaultClient = createDefaultClient(
+  resolvers,
+  // This config is added temporarily to resolve an issue with duplicate design IDs.
+  // Should be removed as soon as https://gitlab.com/gitlab-org/gitlab/issues/13495 is resolved
+  {
+    cacheConfig: {
+      dataIdFromObject: object => {
+        // eslint-disable-next-line no-underscore-dangle, @gitlab/require-i18n-strings
+        if (object.__typename === 'Design') {
+          return object.id && object.image ? `${object.id}-${object.image}` : uniqueId();
+        }
+        return defaultDataIdFromObject(object);
+      },
+    },
+    typeDefs,
+  },
+);
+
+export default new VueApollo({
+  defaultClient,
+});

app/assets/javascripts/design_management_new/graphql/fragments/design.fragment.graphql

+#import "./design_note.fragment.graphql"
+#import "./design_list.fragment.graphql"
+#import "./diff_refs.fragment.graphql"
+#import "./discussion_resolved_status.fragment.graphql"
+
+fragment DesignItem on Design {
+  ...DesignListItem
+  fullPath
+  diffRefs {
+    ...DesignDiffRefs
+  }
+  discussions {
+    nodes {
+      id
+      replyId
+      ...ResolvedStatus
+      notes {
+        nodes {
+          ...DesignNote
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/design_list.fragment.graphql

+fragment DesignListItem on Design {
+  id
+  event
+  filename
+  notesCount
+  image
+  imageV432x230
+}

app/assets/javascripts/design_management_new/graphql/fragments/design_note.fragment.graphql

+#import "./diff_refs.fragment.graphql"
+#import "~/graphql_shared/fragments/author.fragment.graphql"
+#import "./note_permissions.fragment.graphql"
+
+fragment DesignNote on Note {
+  id
+  author {
+    ...Author
+  }
+  body
+  bodyHtml
+  createdAt
+  resolved
+  position {
+    diffRefs {
+      ...DesignDiffRefs
+    }
+    x
+    y
+    height
+    width
+  }
+  userPermissions {
+    ...DesignNotePermissions
+  }
+  discussion {
+    id
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/diff_refs.fragment.graphql

+fragment DesignDiffRefs on DiffRefs {
+  baseSha
+  startSha
+  headSha
+}

app/assets/javascripts/design_management_new/graphql/fragments/discussion_resolved_status.fragment.graphql

+fragment ResolvedStatus on Discussion {
+  resolvable
+  resolved
+  resolvedAt
+  resolvedBy {
+    name
+    webUrl
+  }
+}

app/assets/javascripts/design_management_new/graphql/fragments/note_permissions.fragment.graphql

+fragment DesignNotePermissions on NotePermissions {
+  adminNote
+}

app/assets/javascripts/design_management_new/graphql/fragments/version.fragment.graphql

+fragment VersionListItem on DesignVersion {
+  id
+  sha
+}

app/assets/javascripts/design_management_new/graphql/mutations/create_image_diff_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation createImageDiffNote($input: CreateImageDiffNoteInput!) {
+  createImageDiffNote(input: $input) {
+    note {
+      ...DesignNote
+      discussion {
+        id
+        replyId
+        notes {
+          edges {
+            node {
+              ...DesignNote
+            }
+          }
+        }
+      }
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/create_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation createNote($input: CreateNoteInput!) {
+  createNote(input: $input) {
+    note {
+      ...DesignNote
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/destroy_design.mutation.graphql

+#import "../fragments/version.fragment.graphql"
+
+mutation destroyDesign($filenames: [String!]!, $projectPath: ID!, $iid: ID!) {
+  designManagementDelete(input: { projectPath: $projectPath, iid: $iid, filenames: $filenames }) {
+    version {
+      ...VersionListItem
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/toggle_resolve_discussion.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+#import "../fragments/discussion_resolved_status.fragment.graphql"
+
+mutation toggleResolveDiscussion($id: ID!, $resolve: Boolean!) {
+  discussionToggleResolve(input: { id: $id, resolve: $resolve }) {
+    discussion {
+      id
+      ...ResolvedStatus
+      notes {
+        nodes {
+          ...DesignNote
+        }
+      }
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_active_discussion.mutation.graphql

+mutation updateActiveDiscussion($id: String, $source: String) {
+  updateActiveDiscussion (id: $id, source: $source ) @client
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_image_diff_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation updateImageDiffNote($input: UpdateImageDiffNoteInput!) {
+  updateImageDiffNote(input: $input) {
+    errors
+    note {
+      ...DesignNote
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/update_note.mutation.graphql

+#import "../fragments/design_note.fragment.graphql"
+
+mutation updateNote($input: UpdateNoteInput!) {
+  updateNote(input: $input) {
+    note {
+      ...DesignNote
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/mutations/upload_design.mutation.graphql

+#import "../fragments/design.fragment.graphql"
+
+mutation uploadDesign($files: [Upload!]!, $projectPath: ID!, $iid: ID!) {
+  designManagementUpload(input: { projectPath: $projectPath, iid: $iid, files: $files }) {
+    designs {
+      ...DesignItem
+      versions {
+        edges {
+          node {
+            id
+            sha
+          }
+        }
+      },
+    }
+    skippedDesigns {
+      filename
+    }
+    errors
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/active_discussion.query.graphql

+query activeDiscussion {
+  activeDiscussion @client {
+    id
+    source
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/app_data.query.graphql

+query projectFullPath {
+  projectPath @client
+  issueIid @client
+}

app/assets/javascripts/design_management_new/graphql/queries/design_permissions.query.graphql

+query permissions($fullPath: ID!, $iid: String!) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      userPermissions {
+        createDesign
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/get_design.query.graphql

+#import "../fragments/design.fragment.graphql"
+#import "~/graphql_shared/fragments/author.fragment.graphql"
+
+query getDesign($fullPath: ID!, $iid: String!, $atVersion: ID, $filenames: [String!]) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      designCollection {
+        designs(atVersion: $atVersion, filenames: $filenames) {
+          edges {
+            node {
+              ...DesignItem
+              issue {
+                title
+                webPath
+                webUrl
+                participants {
+                  edges {
+                    node {
+                      ...Author
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/queries/get_design_list.query.graphql

+#import "../fragments/design_list.fragment.graphql"
+#import "../fragments/version.fragment.graphql"
+
+query getDesignList($fullPath: ID!, $iid: String!, $atVersion: ID) {
+  project(fullPath: $fullPath) {
+    id
+    issue(iid: $iid) {
+      designCollection {
+        designs(atVersion: $atVersion) {
+          edges {
+            node {
+              ...DesignListItem
+            }
+          }
+        }
+        versions {
+          edges {
+            node {
+              ...VersionListItem
+            }
+          }
+        }
+      }
+    }
+  }
+}

app/assets/javascripts/design_management_new/graphql/typedefs.graphql

+type ActiveDiscussion {
+  id: ID
+  source: String
+}
+
+extend type Query {
+  activeDiscussion: ActiveDiscussion
+}
+
+extend type Mutation {
+  updateActiveDiscussion(id: ID!, source: String!): Boolean
+}

app/assets/javascripts/design_management_new/index.js

+import $ from 'jquery';
+import Vue from 'vue';
+import createRouter from './router';
+import App from './components/app.vue';
+import apolloProvider from './graphql';
+import getDesignListQuery from './graphql/queries/get_design_list.query.graphql';
+import { DESIGNS_ROUTE_NAME, ROOT_ROUTE_NAME } from './router/constants';
+
+export default () => {
+  const el = document.querySelector('.js-design-management-new');
+  const badge = document.querySelector('.js-designs-count');
+  const { issueIid, projectPath, issuePath } = el.dataset;
+  const router = createRouter(issuePath);
+
+  $('.js-issue-tabs').on('shown.bs.tab', ({ target: { id } }) => {
+    if (id === 'designs' && router.currentRoute.name === ROOT_ROUTE_NAME) {
+      router.push({ name: DESIGNS_ROUTE_NAME });
+    } else if (id === 'discussion') {
+      router.push({ name: ROOT_ROUTE_NAME });
+    }
+  });
+
+  apolloProvider.clients.defaultClient.cache.writeData({
+    data: {
+      projectPath,
+      issueIid,
+      activeDiscussion: {
+        __typename: 'ActiveDiscussion',
+        id: null,
+        source: null,
+      },
+    },
+  });
+
+  apolloProvider.clients.defaultClient
+    .watchQuery({
+      query: getDesignListQuery,
+      variables: {
+        fullPath: projectPath,
+        iid: issueIid,
+        atVersion: null,
+      },
+    })
+    .subscribe(({ data }) => {
+      if (badge) {
+        badge.textContent = data.project.issue.designCollection.designs.edges.length;
+      }
+    });
+
+  return new Vue({
+    el,
+    router,
+    apolloProvider,
+    render(createElement) {
+      return createElement(App);
+    },
+  });
+};

app/assets/javascripts/design_management_new/mixins/all_designs.js

+import { propertyOf } from 'lodash';
+import createFlash from '~/flash';
+import { s__ } from '~/locale';
+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import { extractNodes } from '../utils/design_management_utils';
+import allVersionsMixin from './all_versions';
+import { DESIGNS_ROUTE_NAME } from '../router/constants';
+
+export default {
+  mixins: [allVersionsMixin],
+  apollo: {
+    designs: {
+      query: getDesignListQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+          atVersion: this.designsVersion,
+        };
+      },
+      update: data => {
+        const designEdges = propertyOf(data)(['project', 'issue', 'designCollection', 'designs']);
+        if (designEdges) {
+          return extractNodes(designEdges);
+        }
+        return [];
+      },
+      error() {
+        this.error = true;
+      },
+      result() {
+        if (this.$route.query.version && !this.hasValidVersion) {
+          createFlash(
+            s__(
+              'DesignManagement|Requested design version does not exist. Showing latest version instead',
+            ),
+          );
+          this.$router.replace({ name: DESIGNS_ROUTE_NAME, query: { version: undefined } });
+        }
+      },
+    },
+  },
+  data() {
+    return {
+      designs: [],
+      error: false,
+    };
+  },
+};

app/assets/javascripts/design_management_new/mixins/all_versions.js

+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import appDataQuery from '../graphql/queries/app_data.query.graphql';
+import { findVersionId } from '../utils/design_management_utils';
+
+export default {
+  apollo: {
+    appData: {
+      query: appDataQuery,
+      manual: true,
+      result({ data: { projectPath, issueIid } }) {
+        this.projectPath = projectPath;
+        this.issueIid = issueIid;
+      },
+    },
+    allVersions: {
+      query: getDesignListQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+          atVersion: null,
+        };
+      },
+      update: data => data.project.issue.designCollection.versions.edges,
+    },
+  },
+  computed: {
+    hasValidVersion() {
+      return (
+        this.$route.query.version &&
+        this.allVersions &&
+        this.allVersions.some(version => version.node.id.endsWith(this.$route.query.version))
+      );
+    },
+    designsVersion() {
+      return this.hasValidVersion
+        ? `gid://gitlab/DesignManagement::Version/${this.$route.query.version}`
+        : null;
+    },
+    latestVersionId() {
+      const latestVersion = this.allVersions[0];
+      return latestVersion && findVersionId(latestVersion.node.id);
+    },
+    isLatestVersion() {
+      if (this.allVersions.length > 0) {
+        return (
+          !this.$route.query.version ||
+          !this.latestVersionId ||
+          this.$route.query.version === this.latestVersionId
+        );
+      }
+      return true;
+    },
+  },
+  data() {
+    return {
+      allVersions: [],
+      projectPath: '',
+      issueIid: null,
+    };
+  },
+};

app/assets/javascripts/design_management_new/pages/design/index.vue

+<script>
+import Mousetrap from 'mousetrap';
+import { GlLoadingIcon, GlAlert } from '@gitlab/ui';
+import { ApolloMutation } from 'vue-apollo';
+import createFlash from '~/flash';
+import { fetchPolicies } from '~/lib/graphql';
+import allVersionsMixin from '../../mixins/all_versions';
+import Toolbar from '../../components/toolbar/index.vue';
+import DesignDestroyer from '../../components/design_destroyer.vue';
+import DesignScaler from '../../components/design_scaler.vue';
+import DesignPresentation from '../../components/design_presentation.vue';
+import DesignReplyForm from '../../components/design_notes/design_reply_form.vue';
+import DesignSidebar from '../../components/design_sidebar.vue';
+import getDesignQuery from '../../graphql/queries/get_design.query.graphql';
+import appDataQuery from '../../graphql/queries/app_data.query.graphql';
+import createImageDiffNoteMutation from '../../graphql/mutations/create_image_diff_note.mutation.graphql';
+import updateImageDiffNoteMutation from '../../graphql/mutations/update_image_diff_note.mutation.graphql';
+import updateActiveDiscussionMutation from '../../graphql/mutations/update_active_discussion.mutation.graphql';
+import {
+  extractDiscussions,
+  extractDesign,
+  updateImageDiffNoteOptimisticResponse,
+} from '../../utils/design_management_utils';
+import {
+  updateStoreAfterAddImageDiffNote,
+  updateStoreAfterUpdateImageDiffNote,
+} from '../../utils/cache_update';
+import {
+  ADD_DISCUSSION_COMMENT_ERROR,
+  ADD_IMAGE_DIFF_NOTE_ERROR,
+  UPDATE_IMAGE_DIFF_NOTE_ERROR,
+  DESIGN_NOT_FOUND_ERROR,
+  DESIGN_VERSION_NOT_EXIST_ERROR,
+  UPDATE_NOTE_ERROR,
+  designDeletionError,
+} from '../../utils/error_messages';
+import { trackDesignDetailView } from '../../utils/tracking';
+import { DESIGNS_ROUTE_NAME } from '../../router/constants';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '../../constants';
+
+export default {
+  components: {
+    ApolloMutation,
+    DesignReplyForm,
+    DesignPresentation,
+    DesignScaler,
+    DesignDestroyer,
+    Toolbar,
+    GlLoadingIcon,
+    GlAlert,
+    DesignSidebar,
+  },
+  mixins: [allVersionsMixin],
+  props: {
+    id: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      design: {},
+      comment: '',
+      annotationCoordinates: null,
+      projectPath: '',
+      errorMessage: '',
+      issueIid: '',
+      scale: 1,
+      resolvedDiscussionsExpanded: false,
+    };
+  },
+  apollo: {
+    appData: {
+      query: appDataQuery,
+      manual: true,
+      result({ data: { projectPath, issueIid } }) {
+        this.projectPath = projectPath;
+        this.issueIid = issueIid;
+      },
+    },
+    design: {
+      query: getDesignQuery,
+      // We want to see cached design version if we have one, and fetch newer version on the background to update discussions
+      fetchPolicy: fetchPolicies.CACHE_AND_NETWORK,
+      variables() {
+        return this.designVariables;
+      },
+      update: data => extractDesign(data),
+      result(res) {
+        this.onDesignQueryResult(res);
+      },
+      error() {
+        this.onQueryError(DESIGN_NOT_FOUND_ERROR);
+      },
+    },
+  },
+  computed: {
+    isFirstLoading() {
+      // We only want to show spinner on initial design load (when opened from a deep link to design)
+      // If we already have cached a design, loading shouldn't be indicated to user
+      return this.$apollo.queries.design.loading && !this.design.filename;
+    },
+    discussions() {
+      if (!this.design.discussions) {
+        return [];
+      }
+      return extractDiscussions(this.design.discussions);
+    },
+    markdownPreviewPath() {
+      return `/${this.projectPath}/preview_markdown?target_type=Issue`;
+    },
+    isSubmitButtonDisabled() {
+      return this.comment.trim().length === 0;
+    },
+    designVariables() {
+      return {
+        fullPath: this.projectPath,
+        iid: this.issueIid,
+        filenames: [this.$route.params.id],
+        atVersion: this.designsVersion,
+      };
+    },
+    mutationPayload() {
+      const { x, y, width, height } = this.annotationCoordinates;
+      return {
+        noteableId: this.design.id,
+        body: this.comment,
+        position: {
+          headSha: this.design.diffRefs.headSha,
+          baseSha: this.design.diffRefs.baseSha,
+          startSha: this.design.diffRefs.startSha,
+          x,
+          y,
+          width,
+          height,
+          paths: {
+            newPath: this.design.fullPath,
+          },
+        },
+      };
+    },
+    isAnnotating() {
+      return Boolean(this.annotationCoordinates);
+    },
+    resolvedDiscussions() {
+      return this.discussions.filter(discussion => discussion.resolved);
+    },
+  },
+  watch: {
+    resolvedDiscussions(val) {
+      if (!val.length) {
+        this.resolvedDiscussionsExpanded = false;
+      }
+    },
+  },
+  mounted() {
+    Mousetrap.bind('esc', this.closeDesign);
+    this.trackEvent();
+    // We need to reset the active discussion when opening a new design
+    this.updateActiveDiscussion();
+  },
+  beforeDestroy() {
+    Mousetrap.unbind('esc', this.closeDesign);
+  },
+  methods: {
+    addImageDiffNoteToStore(
+      store,
+      {
+        data: { createImageDiffNote },
+      },
+    ) {
+      updateStoreAfterAddImageDiffNote(
+        store,
+        createImageDiffNote,
+        getDesignQuery,
+        this.designVariables,
+      );
+    },
+    updateImageDiffNoteInStore(
+      store,
+      {
+        data: { updateImageDiffNote },
+      },
+    ) {
+      return updateStoreAfterUpdateImageDiffNote(
+        store,
+        updateImageDiffNote,
+        getDesignQuery,
+        this.designVariables,
+      );
+    },
+    onMoveNote({ noteId, discussionId, position }) {
+      const discussion = this.discussions.find(({ id }) => id === discussionId);
+      const note = discussion.notes.find(
+        ({ discussion: noteDiscussion }) => noteDiscussion.id === discussionId,
+      );
+
+      const mutationPayload = {
+        optimisticResponse: updateImageDiffNoteOptimisticResponse(note, {
+          position,
+        }),
+        variables: {
+          input: {
+            id: noteId,
+            position,
+          },
+        },
+        mutation: updateImageDiffNoteMutation,
+        update: this.updateImageDiffNoteInStore,
+      };
+
+      return this.$apollo.mutate(mutationPayload).catch(e => this.onUpdateImageDiffNoteError(e));
+    },
+    onDesignQueryResult({ data, loading }) {
+      // On the initial load with cache-and-network policy data is undefined while loading is true
+      // To prevent throwing an error, we don't perform any logic until loading is false
+      if (loading) {
+        return;
+      }
+
+      if (!data || !extractDesign(data)) {
+        this.onQueryError(DESIGN_NOT_FOUND_ERROR);
+      } else if (this.$route.query.version && !this.hasValidVersion) {
+        this.onQueryError(DESIGN_VERSION_NOT_EXIST_ERROR);
+      }
+    },
+    onQueryError(message) {
+      // because we redirect user to /designs (the issue page),
+      // we want to create these flashes on the issue page
+      createFlash(message);
+      this.$router.push({ name: this.$options.DESIGNS_ROUTE_NAME });
+    },
+    onError(message, e) {
+      this.errorMessage = message;
+      throw e;
+    },
+    onCreateImageDiffNoteError(e) {
+      this.onError(ADD_IMAGE_DIFF_NOTE_ERROR, e);
+    },
+    onUpdateNoteError(e) {
+      this.onError(UPDATE_NOTE_ERROR, e);
+    },
+    onDesignDiscussionError(e) {
+      this.onError(ADD_DISCUSSION_COMMENT_ERROR, e);
+    },
+    onUpdateImageDiffNoteError(e) {
+      this.onError(UPDATE_IMAGE_DIFF_NOTE_ERROR, e);
+    },
+    onDesignDeleteError(e) {
+      this.onError(designDeletionError({ singular: true }), e);
+    },
+    onResolveDiscussionError(e) {
+      this.onError(UPDATE_IMAGE_DIFF_NOTE_ERROR, e);
+    },
+    openCommentForm(annotationCoordinates) {
+      this.annotationCoordinates = annotationCoordinates;
+      if (this.$refs.newDiscussionForm) {
+        this.$refs.newDiscussionForm.focusInput();
+      }
+    },
+    closeCommentForm() {
+      this.comment = '';
+      this.annotationCoordinates = null;
+    },
+    closeDesign() {
+      this.$router.push({
+        name: this.$options.DESIGNS_ROUTE_NAME,
+        query: this.$route.query,
+      });
+    },
+    trackEvent() {
+      // TODO: This needs to be made aware of referers, or if it's rendered in a different context than a Issue
+      trackDesignDetailView(
+        'issue-design-collection',
+        'issue',
+        this.$route.query.version || this.latestVersionId,
+        this.isLatestVersion,
+      );
+    },
+    updateActiveDiscussion(id) {
+      this.$apollo.mutate({
+        mutation: updateActiveDiscussionMutation,
+        variables: {
+          id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.discussion,
+        },
+      });
+    },
+    toggleResolvedComments() {
+      this.resolvedDiscussionsExpanded = !this.resolvedDiscussionsExpanded;
+    },
+  },
+  createImageDiffNoteMutation,
+  DESIGNS_ROUTE_NAME,
+};
+</script>
+
+<template>
+  <div
+    class="design-detail js-design-detail fixed-top w-100 position-bottom-0 d-flex justify-content-center flex-column flex-lg-row"
+  >
+    <gl-loading-icon v-if="isFirstLoading" size="xl" class="align-self-center" />
+    <template v-else>
+      <div class="d-flex overflow-hidden flex-grow-1 flex-column position-relative">
+        <design-destroyer
+          :filenames="[design.filename]"
+          :project-path="projectPath"
+          :iid="issueIid"
+          @done="$router.push({ name: $options.DESIGNS_ROUTE_NAME })"
+          @error="onDesignDeleteError"
+        >
+          <template #default="{ mutate, loading }">
+            <toolbar
+              :id="id"
+              :is-deleting="loading"
+              :is-latest-version="isLatestVersion"
+              v-bind="design"
+              @delete="mutate"
+            />
+          </template>
+        </design-destroyer>
+
+        <div v-if="errorMessage" class="p-3">
+          <gl-alert variant="danger" @dismiss="errorMessage = null">
+            {{ errorMessage }}
+          </gl-alert>
+        </div>
+        <design-presentation
+          :image="design.image"
+          :image-name="design.filename"
+          :discussions="discussions"
+          :is-annotating="isAnnotating"
+          :scale="scale"
+          :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+          @openCommentForm="openCommentForm"
+          @closeCommentForm="closeCommentForm"
+          @moveNote="onMoveNote"
+        />
+
+        <div class="design-scaler-wrapper position-absolute mb-4 d-flex-center">
+          <design-scaler @scale="scale = $event" />
+        </div>
+      </div>
+      <design-sidebar
+        :design="design"
+        :resolved-discussions-expanded="resolvedDiscussionsExpanded"
+        :markdown-preview-path="markdownPreviewPath"
+        @onDesignDiscussionError="onDesignDiscussionError"
+        @onCreateImageDiffNoteError="onCreateImageDiffNoteError"
+        @updateNoteError="onUpdateNoteError"
+        @resolveDiscussionError="onResolveDiscussionError"
+        @toggleResolvedComments="toggleResolvedComments"
+      >
+        <template #replyForm>
+          <apollo-mutation
+            v-if="isAnnotating"
+            #default="{ mutate, loading }"
+            :mutation="$options.createImageDiffNoteMutation"
+            :variables="{
+              input: mutationPayload,
+            }"
+            :update="addImageDiffNoteToStore"
+            @done="closeCommentForm"
+            @error="onCreateImageDiffNoteError"
+          >
+            <design-reply-form
+              ref="newDiscussionForm"
+              v-model="comment"
+              :is-saving="loading"
+              :markdown-preview-path="markdownPreviewPath"
+              @submitForm="mutate"
+              @cancelForm="closeCommentForm"
+            /> </apollo-mutation
+        ></template>
+      </design-sidebar>
+    </template>
+  </div>
+</template>

app/assets/javascripts/design_management_new/pages/index.vue

+<script>
+import { GlLoadingIcon, GlDeprecatedButton, GlAlert } from '@gitlab/ui';
+import createFlash from '~/flash';
+import { s__, sprintf } from '~/locale';
+import UploadButton from '../components/upload/button.vue';
+import DeleteButton from '../components/delete_button.vue';
+import Design from '../components/list/item.vue';
+import DesignDestroyer from '../components/design_destroyer.vue';
+import DesignVersionDropdown from '../components/upload/design_version_dropdown.vue';
+import DesignDropzone from '../components/upload/design_dropzone.vue';
+import uploadDesignMutation from '../graphql/mutations/upload_design.mutation.graphql';
+import permissionsQuery from '../graphql/queries/design_permissions.query.graphql';
+import getDesignListQuery from '../graphql/queries/get_design_list.query.graphql';
+import allDesignsMixin from '../mixins/all_designs';
+import {
+  UPLOAD_DESIGN_ERROR,
+  EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE,
+  EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE,
+  designUploadSkippedWarning,
+  designDeletionError,
+} from '../utils/error_messages';
+import { updateStoreAfterUploadDesign } from '../utils/cache_update';
+import {
+  designUploadOptimisticResponse,
+  isValidDesignFile,
+} from '../utils/design_management_utils';
+import { getFilename } from '~/lib/utils/file_upload';
+import { DESIGNS_ROUTE_NAME } from '../router/constants';
+
+const MAXIMUM_FILE_UPLOAD_LIMIT = 10;
+
+export default {
+  components: {
+    GlLoadingIcon,
+    GlAlert,
+    GlDeprecatedButton,
+    UploadButton,
+    Design,
+    DesignDestroyer,
+    DesignVersionDropdown,
+    DeleteButton,
+    DesignDropzone,
+  },
+  mixins: [allDesignsMixin],
+  apollo: {
+    permissions: {
+      query: permissionsQuery,
+      variables() {
+        return {
+          fullPath: this.projectPath,
+          iid: this.issueIid,
+        };
+      },
+      update: data => data.project.issue.userPermissions,
+    },
+  },
+  data() {
+    return {
+      permissions: {
+        createDesign: false,
+      },
+      filesToBeSaved: [],
+      selectedDesigns: [],
+    };
+  },
+  computed: {
+    isLoading() {
+      return this.$apollo.queries.designs.loading || this.$apollo.queries.permissions.loading;
+    },
+    isSaving() {
+      return this.filesToBeSaved.length > 0;
+    },
+    canCreateDesign() {
+      return this.permissions.createDesign;
+    },
+    showToolbar() {
+      return this.canCreateDesign && this.allVersions.length > 0;
+    },
+    hasDesigns() {
+      return this.designs.length > 0;
+    },
+    hasSelectedDesigns() {
+      return this.selectedDesigns.length > 0;
+    },
+    canDeleteDesigns() {
+      return this.isLatestVersion && this.hasSelectedDesigns;
+    },
+    projectQueryBody() {
+      return {
+        query: getDesignListQuery,
+        variables: { fullPath: this.projectPath, iid: this.issueIid, atVersion: null },
+      };
+    },
+    selectAllButtonText() {
+      return this.hasSelectedDesigns
+        ? s__('DesignManagement|Deselect all')
+        : s__('DesignManagement|Select all');
+    },
+  },
+  mounted() {
+    this.toggleOnPasteListener(this.$route.name);
+  },
+  methods: {
+    resetFilesToBeSaved() {
+      this.filesToBeSaved = [];
+    },
+    /**
+     * Determine if a design upload is valid, given [files]
+     * @param {Array<File>} files
+     */
+    isValidDesignUpload(files) {
+      if (!this.canCreateDesign) return false;
+
+      if (files.length > MAXIMUM_FILE_UPLOAD_LIMIT) {
+        createFlash(
+          sprintf(
+            s__(
+              'DesignManagement|The maximum number of designs allowed to be uploaded is %{upload_limit}. Please try again.',
+            ),
+            {
+              upload_limit: MAXIMUM_FILE_UPLOAD_LIMIT,
+            },
+          ),
+        );
+
+        return false;
+      }
+      return true;
+    },
+    onUploadDesign(files) {
+      // convert to Array so that we have Array methods (.map, .some, etc.)
+      this.filesToBeSaved = Array.from(files);
+      if (!this.isValidDesignUpload(this.filesToBeSaved)) return null;
+
+      const mutationPayload = {
+        optimisticResponse: designUploadOptimisticResponse(this.filesToBeSaved),
+        variables: {
+          files: this.filesToBeSaved,
+          projectPath: this.projectPath,
+          iid: this.issueIid,
+        },
+        context: {
+          hasUpload: true,
+        },
+        mutation: uploadDesignMutation,
+        update: this.afterUploadDesign,
+      };
+
+      return this.$apollo
+        .mutate(mutationPayload)
+        .then(res => this.onUploadDesignDone(res))
+        .catch(() => this.onUploadDesignError());
+    },
+    afterUploadDesign(
+      store,
+      {
+        data: { designManagementUpload },
+      },
+    ) {
+      updateStoreAfterUploadDesign(store, designManagementUpload, this.projectQueryBody);
+    },
+    onUploadDesignDone(res) {
+      const skippedFiles = res?.data?.designManagementUpload?.skippedDesigns || [];
+      const skippedWarningMessage = designUploadSkippedWarning(this.filesToBeSaved, skippedFiles);
+      if (skippedWarningMessage) {
+        createFlash(skippedWarningMessage, 'warning');
+      }
+
+      // if this upload resulted in a new version being created, redirect user to the latest version
+      if (!this.isLatestVersion) {
+        this.$router.push({ name: DESIGNS_ROUTE_NAME });
+      }
+      this.resetFilesToBeSaved();
+    },
+    onUploadDesignError() {
+      this.resetFilesToBeSaved();
+      createFlash(UPLOAD_DESIGN_ERROR);
+    },
+    changeSelectedDesigns(filename) {
+      if (this.isDesignSelected(filename)) {
+        this.selectedDesigns = this.selectedDesigns.filter(design => design !== filename);
+      } else {
+        this.selectedDesigns.push(filename);
+      }
+    },
+    toggleDesignsSelection() {
+      if (this.hasSelectedDesigns) {
+        this.selectedDesigns = [];
+      } else {
+        this.selectedDesigns = this.designs.map(design => design.filename);
+      }
+    },
+    isDesignSelected(filename) {
+      return this.selectedDesigns.includes(filename);
+    },
+    isDesignToBeSaved(filename) {
+      return this.filesToBeSaved.some(file => file.name === filename);
+    },
+    canSelectDesign(filename) {
+      return this.isLatestVersion && this.canCreateDesign && !this.isDesignToBeSaved(filename);
+    },
+    onDesignDelete() {
+      this.selectedDesigns = [];
+      if (this.$route.query.version) this.$router.push({ name: DESIGNS_ROUTE_NAME });
+    },
+    onDesignDeleteError() {
+      const errorMessage = designDeletionError({ singular: this.selectedDesigns.length === 1 });
+      createFlash(errorMessage);
+    },
+    onExistingDesignDropzoneChange(files, existingDesignFilename) {
+      const filesArr = Array.from(files);
+
+      if (filesArr.length > 1) {
+        createFlash(EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE);
+        return;
+      }
+
+      if (!filesArr.some(({ name }) => existingDesignFilename === name)) {
+        createFlash(EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE);
+        return;
+      }
+
+      this.onUploadDesign(files);
+    },
+    onDesignPaste(event) {
+      const { clipboardData } = event;
+      const files = Array.from(clipboardData.files);
+      if (clipboardData && files.length > 0) {
+        if (!files.some(isValidDesignFile)) {
+          return;
+        }
+        event.preventDefault();
+        let filename = getFilename(event);
+        if (!filename || filename === 'image.png') {
+          filename = `design_${Date.now()}.png`;
+        }
+        const newFile = new File([files[0]], filename);
+        this.onUploadDesign([newFile]);
+      }
+    },
+    toggleOnPasteListener(route) {
+      if (route === DESIGNS_ROUTE_NAME) {
+        document.addEventListener('paste', this.onDesignPaste);
+      } else {
+        document.removeEventListener('paste', this.onDesignPaste);
+      }
+    },
+  },
+  beforeRouteUpdate(to, from, next) {
+    this.toggleOnPasteListener(to.name);
+    this.selectedDesigns = [];
+    next();
+  },
+  beforeRouteLeave(to, from, next) {
+    this.toggleOnPasteListener(to.name);
+    next();
+  },
+};
+</script>
+
+<template>
+  <div>
+    <header v-if="showToolbar" class="row-content-block border-top-0 p-2 d-flex">
+      <div class="d-flex justify-content-between align-items-center w-100">
+        <design-version-dropdown />
+        <div :class="['qa-selector-toolbar', { 'd-flex': hasDesigns, 'd-none': !hasDesigns }]">
+          <gl-deprecated-button
+            v-if="isLatestVersion"
+            variant="link"
+            class="mr-2 js-select-all"
+            @click="toggleDesignsSelection"
+            >{{ selectAllButtonText }}</gl-deprecated-button
+          >
+          <design-destroyer
+            #default="{ mutate, loading }"
+            :filenames="selectedDesigns"
+            :project-path="projectPath"
+            :iid="issueIid"
+            @done="onDesignDelete"
+            @error="onDesignDeleteError"
+          >
+            <delete-button
+              v-if="isLatestVersion"
+              :is-deleting="loading"
+              button-class="btn-danger btn-inverted mr-2"
+              :has-selected-designs="hasSelectedDesigns"
+              @deleteSelectedDesigns="mutate()"
+            >
+              {{ s__('DesignManagement|Delete selected') }}
+              <gl-loading-icon v-if="loading" inline class="ml-1" />
+            </delete-button>
+          </design-destroyer>
+          <upload-button v-if="canCreateDesign" :is-saving="isSaving" @upload="onUploadDesign" />
+        </div>
+      </div>
+    </header>
+    <div class="mt-4">
+      <gl-loading-icon v-if="isLoading" size="md" />
+      <gl-alert v-else-if="error" variant="danger" :dismissible="false">
+        {{ __('An error occurred while loading designs. Please try again.') }}
+      </gl-alert>
+      <ol v-else class="list-unstyled row">
+        <li class="col-md-6 col-lg-4 mb-3">
+          <design-dropzone class="design-list-item" @change="onUploadDesign" />
+        </li>
+        <li v-for="design in designs" :key="design.id" class="col-md-6 col-lg-4 mb-3">
+          <design-dropzone @change="onExistingDesignDropzoneChange($event, design.filename)"
+            ><design v-bind="design" :is-uploading="isDesignToBeSaved(design.filename)"
+          /></design-dropzone>
+
+          <input
+            v-if="canSelectDesign(design.filename)"
+            :checked="isDesignSelected(design.filename)"
+            type="checkbox"
+            class="design-checkbox"
+            @change="changeSelectedDesigns(design.filename)"
+          />
+        </li>
+      </ol>
+    </div>
+    <router-view :key="$route.fullPath" />
+  </div>
+</template>

app/assets/javascripts/design_management_new/router/constants.js

+export const ROOT_ROUTE_NAME = 'root';
+export const DESIGNS_ROUTE_NAME = 'designs';
+export const DESIGN_ROUTE_NAME = 'design';

app/assets/javascripts/design_management_new/router/index.js

+import $ from 'jquery';
+import Vue from 'vue';
+import VueRouter from 'vue-router';
+import routes from './routes';
+import { DESIGN_ROUTE_NAME } from './constants';
+import { getPageLayoutElement } from '~/design_management_new/utils/design_management_utils';
+import { DESIGN_DETAIL_LAYOUT_CLASSLIST } from '../constants';
+
+Vue.use(VueRouter);
+
+export default function createRouter(base) {
+  const router = new VueRouter({
+    base,
+    mode: 'history',
+    routes,
+  });
+  const pageEl = getPageLayoutElement();
+
+  router.beforeEach(({ meta: { el }, name }, _, next) => {
+    $(`#${el}`).tab('show');
+
+    // apply a fullscreen layout style in Design View (a.k.a design detail)
+    if (pageEl) {
+      if (name === DESIGN_ROUTE_NAME) {
+        pageEl.classList.add(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+      } else {
+        pageEl.classList.remove(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+      }
+    }
+
+    next();
+  });
+
+  return router;
+}

app/assets/javascripts/design_management_new/router/routes.js

+import Home from '../pages/index.vue';
+import DesignDetail from '../pages/design/index.vue';
+import { ROOT_ROUTE_NAME, DESIGNS_ROUTE_NAME, DESIGN_ROUTE_NAME } from './constants';
+
+export default [
+  {
+    name: ROOT_ROUTE_NAME,
+    path: '/',
+    component: Home,
+    meta: {
+      el: 'discussion',
+    },
+  },
+  {
+    name: DESIGNS_ROUTE_NAME,
+    path: '/designs',
+    component: Home,
+    meta: {
+      el: 'designs',
+    },
+    children: [
+      {
+        name: DESIGN_ROUTE_NAME,
+        path: ':id',
+        component: DesignDetail,
+        meta: {
+          el: 'designs',
+        },
+        beforeEnter(
+          {
+            params: { id },
+          },
+          from,
+          next,
+        ) {
+          if (typeof id === 'string') {
+            next();
+          }
+        },
+        props: ({ params: { id } }) => ({ id }),
+      },
+    ],
+  },
+];

app/assets/javascripts/design_management_new/utils/cache_update.js

+/* eslint-disable @gitlab/require-i18n-strings */
+
+import createFlash from '~/flash';
+import { extractCurrentDiscussion, extractDesign } from './design_management_utils';
+import {
+  ADD_IMAGE_DIFF_NOTE_ERROR,
+  UPDATE_IMAGE_DIFF_NOTE_ERROR,
+  ADD_DISCUSSION_COMMENT_ERROR,
+  designDeletionError,
+} from './error_messages';
+
+const deleteDesignsFromStore = (store, query, selectedDesigns) => {
+  const data = store.readQuery(query);
+
+  const changedDesigns = data.project.issue.designCollection.designs.edges.filter(
+    ({ node }) => !selectedDesigns.includes(node.filename),
+  );
+  data.project.issue.designCollection.designs.edges = [...changedDesigns];
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+/**
+ * Adds a new version of designs to store
+ *
+ * @param {Object} store
+ * @param {Object} query
+ * @param {Object} version
+ */
+const addNewVersionToStore = (store, query, version) => {
+  if (!version) return;
+
+  const data = store.readQuery(query);
+  const newEdge = { node: version, __typename: 'DesignVersionEdge' };
+
+  data.project.issue.designCollection.versions.edges = [
+    newEdge,
+    ...data.project.issue.designCollection.versions.edges,
+  ];
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+const addDiscussionCommentToStore = (store, createNote, query, queryVariables, discussionId) => {
+  const data = store.readQuery({
+    query,
+    variables: queryVariables,
+  });
+
+  const design = extractDesign(data);
+  const currentDiscussion = extractCurrentDiscussion(design.discussions, discussionId);
+  currentDiscussion.notes.nodes = [...currentDiscussion.notes.nodes, createNote.note];
+
+  design.notesCount += 1;
+  if (
+    !design.issue.participants.edges.some(
+      participant => participant.node.username === createNote.note.author.username,
+    )
+  ) {
+    design.issue.participants.edges = [
+      ...design.issue.participants.edges,
+      {
+        __typename: 'UserEdge',
+        node: {
+          __typename: 'User',
+          ...createNote.note.author,
+        },
+      },
+    ];
+  }
+  store.writeQuery({
+    query,
+    variables: queryVariables,
+    data: {
+      ...data,
+      design: {
+        ...design,
+      },
+    },
+  });
+};
+
+const addImageDiffNoteToStore = (store, createImageDiffNote, query, variables) => {
+  const data = store.readQuery({
+    query,
+    variables,
+  });
+  const newDiscussion = {
+    __typename: 'Discussion',
+    id: createImageDiffNote.note.discussion.id,
+    replyId: createImageDiffNote.note.discussion.replyId,
+    resolvable: true,
+    resolved: false,
+    resolvedAt: null,
+    resolvedBy: null,
+    notes: {
+      __typename: 'NoteConnection',
+      nodes: [createImageDiffNote.note],
+    },
+  };
+  const design = extractDesign(data);
+  const notesCount = design.notesCount + 1;
+  design.discussions.nodes = [...design.discussions.nodes, newDiscussion];
+  if (
+    !design.issue.participants.edges.some(
+      participant => participant.node.username === createImageDiffNote.note.author.username,
+    )
+  ) {
+    design.issue.participants.edges = [
+      ...design.issue.participants.edges,
+      {
+        __typename: 'UserEdge',
+        node: {
+          __typename: 'User',
+          ...createImageDiffNote.note.author,
+        },
+      },
+    ];
+  }
+  store.writeQuery({
+    query,
+    variables,
+    data: {
+      ...data,
+      design: {
+        ...design,
+        notesCount,
+      },
+    },
+  });
+};
+
+const updateImageDiffNoteInStore = (store, updateImageDiffNote, query, variables) => {
+  const data = store.readQuery({
+    query,
+    variables,
+  });
+
+  const design = extractDesign(data);
+  const discussion = extractCurrentDiscussion(
+    design.discussions,
+    updateImageDiffNote.note.discussion.id,
+  );
+
+  discussion.notes = {
+    ...discussion.notes,
+    nodes: [updateImageDiffNote.note, ...discussion.notes.nodes.slice(1)],
+  };
+
+  store.writeQuery({
+    query,
+    variables,
+    data: {
+      ...data,
+      design,
+    },
+  });
+};
+
+const addNewDesignToStore = (store, designManagementUpload, query) => {
+  const data = store.readQuery(query);
+
+  const newDesigns = data.project.issue.designCollection.designs.edges.reduce((acc, design) => {
+    if (!acc.find(d => d.filename === design.node.filename)) {
+      acc.push(design.node);
+    }
+
+    return acc;
+  }, designManagementUpload.designs);
+
+  let newVersionNode;
+  const findNewVersions = designManagementUpload.designs.find(design => design.versions);
+
+  if (findNewVersions) {
+    const findNewVersionsEdges = findNewVersions.versions.edges;
+
+    if (findNewVersionsEdges && findNewVersionsEdges.length) {
+      newVersionNode = [findNewVersionsEdges[0]];
+    }
+  }
+
+  const newVersions = [
+    ...(newVersionNode || []),
+    ...data.project.issue.designCollection.versions.edges,
+  ];
+
+  const updatedDesigns = {
+    __typename: 'DesignCollection',
+    designs: {
+      __typename: 'DesignConnection',
+      edges: newDesigns.map(design => ({
+        __typename: 'DesignEdge',
+        node: design,
+      })),
+    },
+    versions: {
+      __typename: 'DesignVersionConnection',
+      edges: newVersions,
+    },
+  };
+
+  data.project.issue.designCollection = updatedDesigns;
+
+  store.writeQuery({
+    ...query,
+    data,
+  });
+};
+
+const onError = (data, message) => {
+  createFlash(message);
+  throw new Error(data.errors);
+};
+
+export const hasErrors = ({ errors = [] }) => errors?.length;
+
+/**
+ * Updates a store after design deletion
+ *
+ * @param {Object} store
+ * @param {Object} data
+ * @param {Object} query
+ * @param {Array} designs
+ */
+export const updateStoreAfterDesignsDelete = (store, data, query, designs) => {
+  if (hasErrors(data)) {
+    onError(data, designDeletionError({ singular: designs.length === 1 }));
+  } else {
+    deleteDesignsFromStore(store, query, designs);
+    addNewVersionToStore(store, query, data.version);
+  }
+};
+
+export const updateStoreAfterAddDiscussionComment = (
+  store,
+  data,
+  query,
+  queryVariables,
+  discussionId,
+) => {
+  if (hasErrors(data)) {
+    onError(data, ADD_DISCUSSION_COMMENT_ERROR);
+  } else {
+    addDiscussionCommentToStore(store, data, query, queryVariables, discussionId);
+  }
+};
+
+export const updateStoreAfterAddImageDiffNote = (store, data, query, queryVariables) => {
+  if (hasErrors(data)) {
+    onError(data, ADD_IMAGE_DIFF_NOTE_ERROR);
+  } else {
+    addImageDiffNoteToStore(store, data, query, queryVariables);
+  }
+};
+
+export const updateStoreAfterUpdateImageDiffNote = (store, data, query, queryVariables) => {
+  if (hasErrors(data)) {
+    onError(data, UPDATE_IMAGE_DIFF_NOTE_ERROR);
+  } else {
+    updateImageDiffNoteInStore(store, data, query, queryVariables);
+  }
+};
+
+export const updateStoreAfterUploadDesign = (store, data, query) => {
+  if (hasErrors(data)) {
+    onError(data, data.errors[0]);
+  } else {
+    addNewDesignToStore(store, data, query);
+  }
+};

app/assets/javascripts/design_management_new/utils/design_management_utils.js

+import { uniqueId } from 'lodash';
+import { VALID_DESIGN_FILE_MIMETYPE } from '../constants';
+
+export const isValidDesignFile = ({ type }) =>
+  (type.match(VALID_DESIGN_FILE_MIMETYPE.regex) || []).length > 0;
+
+/**
+ * Returns formatted array that doesn't contain
+ * `edges`->`node` nesting
+ *
+ * @param {Array} elements
+ */
+
+export const extractNodes = elements => elements.edges.map(({ node }) => node);
+
+/**
+ * Returns formatted array of discussions that doesn't contain
+ * `edges`->`node` nesting for child notes
+ *
+ * @param {Array} discussions
+ */
+
+export const extractDiscussions = discussions =>
+  discussions.nodes.map((discussion, index) => ({
+    ...discussion,
+    index: index + 1,
+    notes: discussion.notes.nodes,
+  }));
+
+/**
+ * Returns a discussion with the given id from discussions array
+ *
+ * @param {Array} discussions
+ */
+
+export const extractCurrentDiscussion = (discussions, id) =>
+  discussions.nodes.find(discussion => discussion.id === id);
+
+export const findVersionId = id => (id.match('::Version/(.+$)') || [])[1];
+
+export const findNoteId = id => (id.match('DiffNote/(.+$)') || [])[1];
+
+export const extractDesigns = data => data.project.issue.designCollection.designs.edges;
+
+export const extractDesign = data => (extractDesigns(data) || [])[0]?.node;
+
+/**
+ * Generates optimistic response for a design upload mutation
+ * @param {Array<File>} files
+ */
+export const designUploadOptimisticResponse = files => {
+  const designs = files.map(file => ({
+    // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+    // eslint-disable-next-line @gitlab/require-i18n-strings
+    __typename: 'Design',
+    id: -uniqueId(),
+    image: '',
+    imageV432x230: '',
+    filename: file.name,
+    fullPath: '',
+    notesCount: 0,
+    event: 'NONE',
+    diffRefs: {
+      __typename: 'DiffRefs',
+      baseSha: '',
+      startSha: '',
+      headSha: '',
+    },
+    discussions: {
+      __typename: 'DesignDiscussion',
+      nodes: [],
+    },
+    versions: {
+      __typename: 'DesignVersionConnection',
+      edges: {
+        __typename: 'DesignVersionEdge',
+        node: {
+          __typename: 'DesignVersion',
+          id: -uniqueId(),
+          sha: -uniqueId(),
+        },
+      },
+    },
+  }));
+
+  return {
+    // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+    // eslint-disable-next-line @gitlab/require-i18n-strings
+    __typename: 'Mutation',
+    designManagementUpload: {
+      __typename: 'DesignManagementUploadPayload',
+      designs,
+      skippedDesigns: [],
+      errors: [],
+    },
+  };
+};
+
+/**
+ * Generates optimistic response for a design upload mutation
+ * @param {Array<File>} files
+ */
+export const updateImageDiffNoteOptimisticResponse = (note, { position }) => ({
+  // False positive i18n lint: https://gitlab.com/gitlab-org/frontend/eslint-plugin-i18n/issues/26
+  // eslint-disable-next-line @gitlab/require-i18n-strings
+  __typename: 'Mutation',
+  updateImageDiffNote: {
+    __typename: 'UpdateImageDiffNotePayload',
+    note: {
+      ...note,
+      position: {
+        ...note.position,
+        ...position,
+      },
+    },
+    errors: [],
+  },
+});
+
+const normalizeAuthor = author => ({
+  ...author,
+  web_url: author.webUrl,
+  avatar_url: author.avatarUrl,
+});
+
+export const extractParticipants = users => users.edges.map(({ node }) => normalizeAuthor(node));
+
+export const getPageLayoutElement = () => document.querySelector('.layout-page');

app/assets/javascripts/design_management_new/utils/error_messages.js

+import { __, s__, n__, sprintf } from '~/locale';
+
+export const ADD_DISCUSSION_COMMENT_ERROR = s__(
+  'DesignManagement|Could not add a new comment. Please try again.',
+);
+
+export const ADD_IMAGE_DIFF_NOTE_ERROR = s__(
+  'DesignManagement|Could not create new discussion. Please try again.',
+);
+
+export const UPDATE_IMAGE_DIFF_NOTE_ERROR = s__(
+  'DesignManagement|Could not update discussion. Please try again.',
+);
+
+export const UPDATE_NOTE_ERROR = s__('DesignManagement|Could not update note. Please try again.');
+
+export const UPLOAD_DESIGN_ERROR = s__(
+  'DesignManagement|Error uploading a new design. Please try again.',
+);
+
+export const UPLOAD_DESIGN_INVALID_FILETYPE_ERROR = __(
+  'Could not upload your designs as one or more files uploaded are not supported.',
+);
+
+export const DESIGN_NOT_FOUND_ERROR = __('Could not find design.');
+
+export const DESIGN_VERSION_NOT_EXIST_ERROR = __('Requested design version does not exist.');
+
+const DESIGN_UPLOAD_SKIPPED_MESSAGE = s__('DesignManagement|Upload skipped.');
+
+const ALL_DESIGNS_SKIPPED_MESSAGE = `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${s__(
+  'The designs you tried uploading did not change.',
+)}`;
+
+export const EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE = __(
+  'You can only upload one design when dropping onto an existing design.',
+);
+
+export const EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE = __(
+  'You must upload a file with the same file name when dropping onto an existing design.',
+);
+
+const MAX_SKIPPED_FILES_LISTINGS = 5;
+
+const oneDesignSkippedMessage = filename =>
+  `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${sprintf(s__('DesignManagement|%{filename} did not change.'), {
+    filename,
+  })}`;
+
+/**
+ * Return warning message indicating that some (but not all) uploaded
+ * files were skipped.
+ * @param {Array<{ filename }>} skippedFiles
+ */
+const someDesignsSkippedMessage = skippedFiles => {
+  const designsSkippedMessage = `${DESIGN_UPLOAD_SKIPPED_MESSAGE} ${s__(
+    'Some of the designs you tried uploading did not change:',
+  )}`;
+
+  const moreText = sprintf(s__(`DesignManagement|and %{moreCount} more.`), {
+    moreCount: skippedFiles.length - MAX_SKIPPED_FILES_LISTINGS,
+  });
+
+  return `${designsSkippedMessage} ${skippedFiles
+    .slice(0, MAX_SKIPPED_FILES_LISTINGS)
+    .map(({ filename }) => filename)
+    .join(', ')}${skippedFiles.length > MAX_SKIPPED_FILES_LISTINGS ? `, ${moreText}` : '.'}`;
+};
+
+export const designDeletionError = ({ singular = true } = {}) => {
+  const design = singular ? __('a design') : __('designs');
+  return sprintf(s__('Could not delete %{design}. Please try again.'), {
+    design,
+  });
+};
+
+/**
+ * Return warning message, if applicable, that one, some or all uploaded
+ * files were skipped.
+ * @param {Array<{ filename }>} uploadedDesigns
+ * @param {Array<{ filename }>} skippedFiles
+ */
+export const designUploadSkippedWarning = (uploadedDesigns, skippedFiles) => {
+  if (skippedFiles.length === 0) {
+    return null;
+  }
+
+  if (skippedFiles.length === uploadedDesigns.length) {
+    const { filename } = skippedFiles[0];
+
+    return n__(oneDesignSkippedMessage(filename), ALL_DESIGNS_SKIPPED_MESSAGE, skippedFiles.length);
+  }
+
+  return someDesignsSkippedMessage(skippedFiles);
+};

app/assets/javascripts/design_management_new/utils/tracking.js

+import Tracking from '~/tracking';
+
+function assembleDesignPayload(payloadArr) {
+  return {
+    value: {
+      'internal-object-refrerer': payloadArr[0],
+      'design-collection-owner': payloadArr[1],
+      'design-version-number': payloadArr[2],
+      'design-is-current-version': payloadArr[3],
+    },
+  };
+}
+
+// Tracking Constants
+const DESIGN_TRACKING_PAGE_NAME = 'projects:issues:design';
+
+// eslint-disable-next-line import/prefer-default-export
+export function trackDesignDetailView(
+  referer = '',
+  owner = '',
+  designVersion = 1,
+  latestVersion = false,
+) {
+  Tracking.event(DESIGN_TRACKING_PAGE_NAME, 'design_viewed', {
+    label: 'design_viewed',
+    ...assembleDesignPayload([referer, owner, designVersion, latestVersion]),
+  });
+}

app/assets/javascripts/pages/projects/issues/show.js

@@ -13,14 +13,15 @@ export default function() {
   initSentryErrorStackTraceApp();
   initRelatedMergeRequestsApp();
 
-  // .js-design-management is currently EE-only.
-  // This will be moved to CE as part of https://gitlab.com/gitlab-org/gitlab/-/issues/212566#frontend
-  // at which point this conditional can be removed.
-  if (document.querySelector('.js-design-management')) {
-    import(/* webpackChunkName: 'design_management' */ '~/design_management')
-      .then(module => module.default())
-      .catch(() => {});
-  }
+  import(/* webpackChunkName: 'design_management' */ '~/design_management')
+    .then(module => module.default())
+    .catch(() => {});
+
+  // This will be removed when we remove the `design_management_moved` feature flag
+  // See https://gitlab.com/gitlab-org/gitlab/-/issues/223197
+  import(/* webpackChunkName: 'design_management' */ '~/design_management_new')
+    .then(module => module.default())
+    .catch(() => {});
 
   new Issue(); // eslint-disable-line no-new
   new ShortcutsIssuable(); // eslint-disable-line no-new

app/views/projects/issues/_design_management.html.haml

 - if @project.design_management_enabled?
-  .js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
+  - if Feature.enabled?(:design_management_moved, @project)
+    .js-design-management-new{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
+  - else
+    .js-design-management{ data: { project_path: @project.full_path, issue_iid: @issue.iid, issue_path: project_issue_path(@project, @issue) } }
 - else
   .mt-4
     .row.empty-state

spec/features/projects/issues/design_management/user_links_to_designs_in_issue_spec.rb

@@ -27,6 +27,10 @@ RSpec.describe 'viewing issues with design references' do
     MD
   end
 
+  before do
+    stub_feature_flags(design_management_moved: false)
+  end
+
   def visit_page_with_design_references
     public_issue = create(:issue, project: public_project, description: description)
     visit project_issue_path(public_issue.project, public_issue)

spec/features/projects/issues/design_management/user_paginates_designs_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe 'User paginates issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     create_list(:design, 2, :with_file, issue: issue)
 

spec/features/projects/issues/design_management/user_permissions_upload_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe 'User design permissions', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_uploads_designs_spec.rb

@@ -16,6 +16,7 @@ RSpec.describe 'User uploads new design', :js do
   context "when the feature is available" do
     before do
       enable_design_management
+      stub_feature_flags(design_management_moved: false)
 
       visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_views_design_images_spec.rb

@@ -13,6 +13,7 @@ RSpec.describe 'Users views raw design image files' do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
   end
 
   it 'serves the latest design version when no ref is given' do

spec/features/projects/issues/design_management/user_views_design_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe 'User views issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit project_issue_path(project, issue)
 

spec/features/projects/issues/design_management/user_views_designs_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe 'User views issue designs', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
   end
 
   context 'navigates from the issue view' do

spec/features/projects/issues/design_management/user_views_designs_with_svg_xss_spec.rb

@@ -12,6 +12,7 @@ RSpec.describe 'User views an SVG design that contains XSS', :js do
 
   before do
     enable_design_management
+    stub_feature_flags(design_management_moved: false)
 
     visit designs_project_issue_path(
       project,

spec/frontend/design_management_new/components/__snapshots__/design_note_pin_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design note pin component should match the snapshot of note when repositioning 1`] = `
+<button
+  aria-label="Comment form position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center btn-transparent comment-indicator"
+  style="left: 10px; top: 10px; cursor: move;"
+  type="button"
+>
+  <icon-stub
+    name="image-comment-dark"
+    size="16"
+  />
+</button>
+`;
+
+exports[`Design note pin component should match the snapshot of note with index 1`] = `
+<button
+  aria-label="Comment '1' position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center js-image-badge badge badge-pill"
+  style="left: 10px; top: 10px;"
+  type="button"
+>
+  
+    1
+  
+</button>
+`;
+
+exports[`Design note pin component should match the snapshot of note without index 1`] = `
+<button
+  aria-label="Comment form position"
+  class="design-pin gl-absolute gl-display-flex gl-align-items-center gl-justify-content-center btn-transparent comment-indicator"
+  style="left: 10px; top: 10px;"
+  type="button"
+>
+  <icon-stub
+    name="image-comment-dark"
+    size="16"
+  />
+</button>
+`;

spec/frontend/design_management_new/components/__snapshots__/design_presentation_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design presentation component currentCommentForm is equal to current annotation position when isAnnotating is true 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      currentcommentform="[object Object]"
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component currentCommentForm is null when isAnnotating is false 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component currentCommentForm is null when isAnnotating is true but annotation position is falsey 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component renders empty state when no image provided 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <!---->
+     
+    <!---->
+  </div>
+</div>
+`;
+
+exports[`Design management design presentation component renders image and overlay when image provided 1`] = `
+<div
+  class="h-100 w-100 p-3 overflow-auto position-relative"
+>
+  <div
+    class="h-100 w-100 d-flex align-items-center position-relative"
+  >
+    <design-image-stub
+      image="test.jpg"
+      name="test"
+      scale="1"
+    />
+     
+    <design-overlay-stub
+      dimensions="[object Object]"
+      notes=""
+      position="[object Object]"
+    />
+  </div>
+</div>
+`;

spec/frontend/design_management_new/components/__snapshots__/design_scaler_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design scaler component minus and reset buttons are disabled when scale === 1 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;
+
+exports[`Design management design scaler component minus and reset buttons are enabled when scale > 1 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;
+
+exports[`Design management design scaler component plus button is disabled when scale === 2 1`] = `
+<div
+  class="design-scaler btn-group"
+  role="group"
+>
+  <button
+    class="btn"
+  >
+    <span
+      class="d-flex-center gl-icon s16"
+    >
+      
+      –
+    
+    </span>
+  </button>
+   
+  <button
+    class="btn"
+  >
+    <gl-icon-stub
+      name="redo"
+      size="16"
+    />
+  </button>
+   
+  <button
+    class="btn"
+    disabled="disabled"
+  >
+    <gl-icon-stub
+      name="plus"
+      size="16"
+    />
+  </button>
+</div>
+`;

spec/frontend/design_management_new/components/__snapshots__/image_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management large image component renders image 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100 img-fluid"
+    src="test.jpg"
+  />
+</div>
+`;
+
+exports[`Design management large image component renders loading state 1`] = `
+<div
+  class="m-auto js-design-image"
+  isloading="true"
+>
+  <!---->
+   
+  <img
+    alt=""
+    class="mh-100 img-fluid"
+    src=""
+  />
+</div>
+`;
+
+exports[`Design management large image component renders media broken icon on error 1`] = `
+<gl-icon-stub
+  class="text-secondary-100"
+  name="media-broken"
+  size="48"
+/>
+`;
+
+exports[`Design management large image component sets correct classes and styles if imageStyle is set 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100"
+    src="test.jpg"
+    style="width: 100px; height: 100px;"
+  />
+</div>
+`;
+
+exports[`Design management large image component zoom sets image style when zoomed 1`] = `
+<div
+  class="m-auto js-design-image"
+>
+  <!---->
+   
+  <img
+    alt="test"
+    class="mh-100"
+    src="test.jpg"
+    style="width: 200px; height: 200px;"
+  />
+</div>
+`;

spec/frontend/design_management_new/components/delete_button_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlDeprecatedButton, GlModal, GlModalDirective } from '@gitlab/ui';
+import BatchDeleteButton from '~/design_management_new/components/delete_button.vue';
+
+describe('Batch delete button component', () => {
+  let wrapper;
+
+  const findButton = () => wrapper.find(GlDeprecatedButton);
+  const findModal = () => wrapper.find(GlModal);
+
+  function createComponent(isDeleting = false) {
+    wrapper = shallowMount(BatchDeleteButton, {
+      propsData: {
+        isDeleting,
+      },
+      directives: {
+        GlModalDirective,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders non-disabled button by default', () => {
+    createComponent();
+
+    expect(findButton().exists()).toBe(true);
+    expect(findButton().attributes('disabled')).toBeFalsy();
+  });
+
+  it('renders disabled button when design is deleting', () => {
+    createComponent(true);
+    expect(findButton().attributes('disabled')).toBeTruthy();
+  });
+
+  it('emits `deleteSelectedDesigns` event on modal ok click', () => {
+    createComponent();
+    findButton().vm.$emit('click');
+    return wrapper.vm
+      .$nextTick()
+      .then(() => {
+        findModal().vm.$emit('ok');
+        return wrapper.vm.$nextTick();
+      })
+      .then(() => {
+        expect(wrapper.emitted().deleteSelectedDesigns).toBeTruthy();
+      });
+  });
+});

spec/frontend/design_management_new/components/design_note_pin_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignNotePin from '~/design_management_new/components/design_note_pin.vue';
+
+describe('Design note pin component', () => {
+  let wrapper;
+
+  function createComponent(propsData = {}) {
+    wrapper = shallowMount(DesignNotePin, {
+      propsData: {
+        position: {
+          left: '10px',
+          top: '10px',
+        },
+        ...propsData,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('should match the snapshot of note without index', () => {
+    createComponent();
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('should match the snapshot of note with index', () => {
+    createComponent({ label: 1 });
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('should match the snapshot of note when repositioning', () => {
+    createComponent({ repositioning: true });
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  describe('pinStyle', () => {
+    it('sets cursor to `move` when repositioning = true', () => {
+      createComponent({ repositioning: true });
+      expect(wrapper.vm.pinStyle.cursor).toBe('move');
+    });
+
+    it('does not set cursor when repositioning = false', () => {
+      createComponent();
+      expect(wrapper.vm.pinStyle.cursor).toBe(undefined);
+    });
+  });
+});

spec/frontend/design_management_new/components/design_notes/__snapshots__/design_note_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design note component should match the snapshot 1`] = `
+<timeline-entry-item-stub
+  class="design-note note-form"
+  id="note_123"
+>
+  <user-avatar-link-stub
+    imgalt=""
+    imgcssclasses=""
+    imgsize="40"
+    imgsrc=""
+    linkhref=""
+    tooltipplacement="top"
+    tooltiptext=""
+    username=""
+  />
+   
+  <div
+    class="d-flex justify-content-between"
+  >
+    <div>
+      <a
+        class="js-user-link"
+        data-user-id="author-id"
+      >
+        <span
+          class="note-header-author-name bold"
+        >
+          
+        </span>
+         
+        <!---->
+         
+        <span
+          class="note-headline-light"
+        >
+          @
+        </span>
+      </a>
+       
+      <span
+        class="note-headline-light note-headline-meta"
+      >
+        <span
+          class="system-note-message"
+        />
+         
+        <!---->
+      </span>
+    </div>
+     
+    <div
+      class="gl-display-flex"
+    >
+       
+      <!---->
+    </div>
+  </div>
+   
+  <div
+    class="note-text js-note-text md"
+    data-qa-selector="note_content"
+  />
+   
+</timeline-entry-item-stub>
+`;

spec/frontend/design_management_new/components/design_notes/__snapshots__/design_reply_form_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design reply form component renders button text as "Comment" when creating a comment 1`] = `
+"<button data-track-event=\\"click_button\\" data-qa-selector=\\"save_comment_button\\" type=\\"submit\\" disabled=\\"disabled\\" class=\\"btn btn-success btn-md disabled\\">
+  <!---->
+  Comment
+</button>"
+`;
+
+exports[`Design reply form component renders button text as "Save comment" when creating a comment 1`] = `
+"<button data-track-event=\\"click_button\\" data-qa-selector=\\"save_comment_button\\" type=\\"submit\\" disabled=\\"disabled\\" class=\\"btn btn-success btn-md disabled\\">
+  <!---->
+  Save comment
+</button>"
+`;

spec/frontend/design_management_new/components/design_notes/design_discussion_spec.js

+import { mount } from '@vue/test-utils';
+import { GlLoadingIcon } from '@gitlab/ui';
+import notes from '../../mock_data/notes';
+import DesignDiscussion from '~/design_management_new/components/design_notes/design_discussion.vue';
+import DesignNote from '~/design_management_new/components/design_notes/design_note.vue';
+import DesignReplyForm from '~/design_management_new/components/design_notes/design_reply_form.vue';
+import createNoteMutation from '~/design_management_new/graphql/mutations/create_note.mutation.graphql';
+import toggleResolveDiscussionMutation from '~/design_management_new/graphql/mutations/toggle_resolve_discussion.mutation.graphql';
+import ReplyPlaceholder from '~/notes/components/discussion_reply_placeholder.vue';
+import ToggleRepliesWidget from '~/design_management_new/components/design_notes/toggle_replies_widget.vue';
+
+const discussion = {
+  id: '0',
+  resolved: false,
+  resolvable: true,
+  notes,
+};
+
+describe('Design discussions component', () => {
+  let wrapper;
+
+  const findDesignNotes = () => wrapper.findAll(DesignNote);
+  const findReplyPlaceholder = () => wrapper.find(ReplyPlaceholder);
+  const findReplyForm = () => wrapper.find(DesignReplyForm);
+  const findRepliesWidget = () => wrapper.find(ToggleRepliesWidget);
+  const findResolveButton = () => wrapper.find('[data-testid="resolve-button"]');
+  const findResolveIcon = () => wrapper.find('[data-testid="resolve-icon"]');
+  const findResolvedMessage = () => wrapper.find('[data-testid="resolved-message"]');
+  const findResolveLoadingIcon = () => wrapper.find(GlLoadingIcon);
+  const findResolveCheckbox = () => wrapper.find('[data-testid="resolve-checkbox"]');
+
+  const mutationVariables = {
+    mutation: createNoteMutation,
+    update: expect.anything(),
+    variables: {
+      input: {
+        noteableId: 'noteable-id',
+        body: 'test',
+        discussionId: '0',
+      },
+    },
+  };
+  const mutate = jest.fn(() => Promise.resolve());
+  const $apollo = {
+    mutate,
+  };
+
+  function createComponent(props = {}, data = {}) {
+    wrapper = mount(DesignDiscussion, {
+      propsData: {
+        resolvedDiscussionsExpanded: true,
+        discussion,
+        noteableId: 'noteable-id',
+        designId: 'design-id',
+        discussionIndex: 1,
+        discussionWithOpenForm: '',
+        ...props,
+      },
+      data() {
+        return {
+          ...data,
+        };
+      },
+      mocks: {
+        $apollo,
+        $route: {
+          hash: '#note_1',
+        },
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when discussion is not resolvable', () => {
+    beforeEach(() => {
+      createComponent({
+        discussion: {
+          ...discussion,
+          resolvable: false,
+        },
+      });
+    });
+
+    it('does not render an icon to resolve a thread', () => {
+      expect(findResolveIcon().exists()).toBe(false);
+    });
+
+    it('does not render a checkbox in reply form', () => {
+      findReplyPlaceholder().vm.$emit('onMouseDown');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findResolveCheckbox().exists()).toBe(false);
+      });
+    });
+  });
+
+  describe('when discussion is unresolved', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('renders correct amount of discussion notes', () => {
+      expect(findDesignNotes()).toHaveLength(2);
+      expect(findDesignNotes().wrappers.every(w => w.isVisible())).toBe(true);
+    });
+
+    it('renders reply placeholder', () => {
+      expect(findReplyPlaceholder().isVisible()).toBe(true);
+    });
+
+    it('does not render toggle replies widget', () => {
+      expect(findRepliesWidget().exists()).toBe(false);
+    });
+
+    it('renders a correct icon to resolve a thread', () => {
+      expect(findResolveIcon().props('name')).toBe('check-circle');
+    });
+
+    it('renders a checkbox with Resolve thread text in reply form', () => {
+      findReplyPlaceholder().vm.$emit('onClick');
+      wrapper.setProps({ discussionWithOpenForm: discussion.id });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findResolveCheckbox().text()).toBe('Resolve thread');
+      });
+    });
+
+    it('does not render resolved message', () => {
+      expect(findResolvedMessage().exists()).toBe(false);
+    });
+  });
+
+  describe('when discussion is resolved', () => {
+    beforeEach(() => {
+      createComponent({
+        discussion: {
+          ...discussion,
+          resolved: true,
+          resolvedBy: notes[0].author,
+          resolvedAt: '2020-05-08T07:10:45Z',
+        },
+      });
+    });
+
+    it('shows only the first note', () => {
+      expect(
+        findDesignNotes()
+          .at(0)
+          .isVisible(),
+      ).toBe(true);
+      expect(
+        findDesignNotes()
+          .at(1)
+          .isVisible(),
+      ).toBe(false);
+    });
+
+    it('renders resolved message', () => {
+      expect(findResolvedMessage().exists()).toBe(true);
+    });
+
+    it('does not show renders reply placeholder', () => {
+      expect(findReplyPlaceholder().isVisible()).toBe(false);
+    });
+
+    it('renders toggle replies widget with correct props', () => {
+      expect(findRepliesWidget().exists()).toBe(true);
+      expect(findRepliesWidget().props()).toEqual({
+        collapsed: true,
+        replies: notes.slice(1),
+      });
+    });
+
+    it('renders a correct icon to resolve a thread', () => {
+      expect(findResolveIcon().props('name')).toBe('check-circle-filled');
+    });
+
+    describe('when replies are expanded', () => {
+      beforeEach(() => {
+        findRepliesWidget().vm.$emit('toggle');
+        return wrapper.vm.$nextTick();
+      });
+
+      it('renders replies widget with collapsed prop equal to false', () => {
+        expect(findRepliesWidget().props('collapsed')).toBe(false);
+      });
+
+      it('renders the second note', () => {
+        expect(
+          findDesignNotes()
+            .at(1)
+            .isVisible(),
+        ).toBe(true);
+      });
+
+      it('renders a reply placeholder', () => {
+        expect(findReplyPlaceholder().isVisible()).toBe(true);
+      });
+
+      it('renders a checkbox with Unresolve thread text in reply form', () => {
+        findReplyPlaceholder().vm.$emit('onClick');
+        wrapper.setProps({ discussionWithOpenForm: discussion.id });
+
+        return wrapper.vm.$nextTick().then(() => {
+          expect(findResolveCheckbox().text()).toBe('Unresolve thread');
+        });
+      });
+    });
+  });
+
+  it('hides reply placeholder and opens form on placeholder click', () => {
+    createComponent();
+    findReplyPlaceholder().vm.$emit('onClick');
+    wrapper.setProps({ discussionWithOpenForm: discussion.id });
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(findReplyPlaceholder().exists()).toBe(false);
+      expect(findReplyForm().exists()).toBe(true);
+    });
+  });
+
+  it('calls mutation on submitting form and closes the form', () => {
+    createComponent(
+      { discussionWithOpenForm: discussion.id },
+      { discussionComment: 'test', isFormRendered: true },
+    );
+
+    findReplyForm().vm.$emit('submitForm');
+    expect(mutate).toHaveBeenCalledWith(mutationVariables);
+
+    return mutate()
+      .then(() => {
+        return wrapper.vm.$nextTick();
+      })
+      .then(() => {
+        expect(findReplyForm().exists()).toBe(false);
+      });
+  });
+
+  it('clears the discussion comment on closing comment form', () => {
+    createComponent(
+      { discussionWithOpenForm: discussion.id },
+      { discussionComment: 'test', isFormRendered: true },
+    );
+
+    return wrapper.vm
+      .$nextTick()
+      .then(() => {
+        findReplyForm().vm.$emit('cancelForm');
+
+        expect(wrapper.vm.discussionComment).toBe('');
+        return wrapper.vm.$nextTick();
+      })
+      .then(() => {
+        expect(findReplyForm().exists()).toBe(false);
+      });
+  });
+
+  it('applies correct class to design notes when discussion is highlighted', () => {
+    createComponent(
+      {},
+      {
+        activeDiscussion: {
+          id: notes[0].id,
+          source: 'pin',
+        },
+      },
+    );
+
+    expect(wrapper.findAll(DesignNote).wrappers.every(note => note.classes('gl-bg-blue-50'))).toBe(
+      true,
+    );
+  });
+
+  it('calls toggleResolveDiscussion mutation on resolve thread button click', () => {
+    createComponent();
+    findResolveButton().trigger('click');
+    expect(mutate).toHaveBeenCalledWith({
+      mutation: toggleResolveDiscussionMutation,
+      variables: {
+        id: discussion.id,
+        resolve: true,
+      },
+    });
+    return wrapper.vm.$nextTick(() => {
+      expect(findResolveLoadingIcon().exists()).toBe(true);
+    });
+  });
+
+  it('calls toggleResolveDiscussion mutation after adding a note if checkbox was checked', () => {
+    createComponent(
+      { discussionWithOpenForm: discussion.id },
+      { discussionComment: 'test', isFormRendered: true },
+    );
+    findResolveButton().trigger('click');
+    findReplyForm().vm.$emit('submitForm');
+
+    return mutate().then(() => {
+      expect(mutate).toHaveBeenCalledWith({
+        mutation: toggleResolveDiscussionMutation,
+        variables: {
+          id: discussion.id,
+          resolve: true,
+        },
+      });
+    });
+  });
+
+  it('emits openForm event on opening the form', () => {
+    createComponent();
+    findReplyPlaceholder().vm.$emit('onClick');
+
+    expect(wrapper.emitted('openForm')).toBeTruthy();
+  });
+});

spec/frontend/design_management_new/components/design_notes/design_note_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { ApolloMutation } from 'vue-apollo';
+import DesignNote from '~/design_management_new/components/design_notes/design_note.vue';
+import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import DesignReplyForm from '~/design_management_new/components/design_notes/design_reply_form.vue';
+
+const scrollIntoViewMock = jest.fn();
+const note = {
+  id: 'gid://gitlab/DiffNote/123',
+  author: {
+    id: 'author-id',
+  },
+  body: 'test',
+  userPermissions: {
+    adminNote: false,
+  },
+};
+HTMLElement.prototype.scrollIntoView = scrollIntoViewMock;
+
+const $route = {
+  hash: '#note_123',
+};
+
+const mutate = jest.fn().mockResolvedValue({ data: { updateNote: {} } });
+
+describe('Design note component', () => {
+  let wrapper;
+
+  const findUserAvatar = () => wrapper.find(UserAvatarLink);
+  const findUserLink = () => wrapper.find('.js-user-link');
+  const findReplyForm = () => wrapper.find(DesignReplyForm);
+  const findEditButton = () => wrapper.find('.js-note-edit');
+  const findNoteContent = () => wrapper.find('.js-note-text');
+
+  function createComponent(props = {}, data = { isEditing: false }) {
+    wrapper = shallowMount(DesignNote, {
+      propsData: {
+        note: {},
+        ...props,
+      },
+      data() {
+        return {
+          ...data,
+        };
+      },
+      mocks: {
+        $route,
+        $apollo: {
+          mutate,
+        },
+      },
+      stubs: {
+        ApolloMutation,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('should match the snapshot', () => {
+    createComponent({
+      note,
+    });
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('should render an author', () => {
+    createComponent({
+      note,
+    });
+
+    expect(findUserAvatar().exists()).toBe(true);
+    expect(findUserLink().exists()).toBe(true);
+  });
+
+  it('should render a time ago tooltip if note has createdAt property', () => {
+    createComponent({
+      note: {
+        ...note,
+        createdAt: '2019-07-26T15:02:20Z',
+      },
+    });
+
+    expect(wrapper.find(TimeAgoTooltip).exists()).toBe(true);
+  });
+
+  it('should trigger a scrollIntoView method', () => {
+    createComponent({
+      note,
+    });
+
+    expect(scrollIntoViewMock).toHaveBeenCalled();
+  });
+
+  it('should not render edit icon when user does not have a permission', () => {
+    createComponent({
+      note,
+    });
+
+    expect(findEditButton().exists()).toBe(false);
+  });
+
+  describe('when user has a permission to edit note', () => {
+    it('should open an edit form on edit button click', () => {
+      createComponent({
+        note: {
+          ...note,
+          userPermissions: {
+            adminNote: true,
+          },
+        },
+      });
+
+      findEditButton().trigger('click');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findReplyForm().exists()).toBe(true);
+        expect(findNoteContent().exists()).toBe(false);
+      });
+    });
+
+    describe('when edit form is rendered', () => {
+      beforeEach(() => {
+        createComponent(
+          {
+            note: {
+              ...note,
+              userPermissions: {
+                adminNote: true,
+              },
+            },
+          },
+          { isEditing: true },
+        );
+      });
+
+      it('should not render note content and should render reply form', () => {
+        expect(findNoteContent().exists()).toBe(false);
+        expect(findReplyForm().exists()).toBe(true);
+      });
+
+      it('hides the form on hideForm event', () => {
+        findReplyForm().vm.$emit('cancelForm');
+
+        return wrapper.vm.$nextTick().then(() => {
+          expect(findReplyForm().exists()).toBe(false);
+          expect(findNoteContent().exists()).toBe(true);
+        });
+      });
+
+      it('calls a mutation on submitForm event and hides a form', () => {
+        findReplyForm().vm.$emit('submitForm');
+        expect(mutate).toHaveBeenCalled();
+
+        return mutate()
+          .then(() => {
+            return wrapper.vm.$nextTick();
+          })
+          .then(() => {
+            expect(findReplyForm().exists()).toBe(false);
+            expect(findNoteContent().exists()).toBe(true);
+          });
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/design_notes/design_reply_form_spec.js

+import { mount } from '@vue/test-utils';
+import DesignReplyForm from '~/design_management_new/components/design_notes/design_reply_form.vue';
+
+const showModal = jest.fn();
+
+const GlModal = {
+  template: '<div><slot name="modal-title"></slot><slot></slot><slot name="modal-ok"></slot></div>',
+  methods: {
+    show: showModal,
+  },
+};
+
+describe('Design reply form component', () => {
+  let wrapper;
+
+  const findTextarea = () => wrapper.find('textarea');
+  const findSubmitButton = () => wrapper.find({ ref: 'submitButton' });
+  const findCancelButton = () => wrapper.find({ ref: 'cancelButton' });
+  const findModal = () => wrapper.find({ ref: 'cancelCommentModal' });
+
+  function createComponent(props = {}, mountOptions = {}) {
+    wrapper = mount(DesignReplyForm, {
+      propsData: {
+        value: '',
+        isSaving: false,
+        ...props,
+      },
+      stubs: { GlModal },
+      ...mountOptions,
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('textarea has focus after component mount', () => {
+    // We need to attach to document, so that `document.activeElement` is properly set in jsdom
+    createComponent({}, { attachToDocument: true });
+
+    expect(findTextarea().element).toEqual(document.activeElement);
+  });
+
+  it('renders button text as "Comment" when creating a comment', () => {
+    createComponent();
+
+    expect(findSubmitButton().html()).toMatchSnapshot();
+  });
+
+  it('renders button text as "Save comment" when creating a comment', () => {
+    createComponent({ isNewComment: false });
+
+    expect(findSubmitButton().html()).toMatchSnapshot();
+  });
+
+  describe('when form has no text', () => {
+    beforeEach(() => {
+      createComponent({
+        value: '',
+      });
+    });
+
+    it('submit button is disabled', () => {
+      expect(findSubmitButton().attributes().disabled).toBeTruthy();
+    });
+
+    it('does not emit submitForm event on textarea ctrl+enter keydown', () => {
+      findTextarea().trigger('keydown.enter', {
+        ctrlKey: true,
+      });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('submitForm')).toBeFalsy();
+      });
+    });
+
+    it('does not emit submitForm event on textarea meta+enter keydown', () => {
+      findTextarea().trigger('keydown.enter', {
+        metaKey: true,
+      });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('submitForm')).toBeFalsy();
+      });
+    });
+
+    it('emits cancelForm event on pressing escape button on textarea', () => {
+      findTextarea().trigger('keyup.esc');
+
+      expect(wrapper.emitted('cancelForm')).toBeTruthy();
+    });
+
+    it('emits cancelForm event on clicking Cancel button', () => {
+      findCancelButton().vm.$emit('click');
+
+      expect(wrapper.emitted('cancelForm')).toHaveLength(1);
+    });
+  });
+
+  describe('when form has text', () => {
+    beforeEach(() => {
+      createComponent({
+        value: 'test',
+      });
+    });
+
+    it('submit button is enabled', () => {
+      expect(findSubmitButton().attributes().disabled).toBeFalsy();
+    });
+
+    it('emits submitForm event on Comment button click', () => {
+      findSubmitButton().vm.$emit('click');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('submitForm')).toBeTruthy();
+      });
+    });
+
+    it('emits submitForm event on textarea ctrl+enter keydown', () => {
+      findTextarea().trigger('keydown.enter', {
+        ctrlKey: true,
+      });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('submitForm')).toBeTruthy();
+      });
+    });
+
+    it('emits submitForm event on textarea meta+enter keydown', () => {
+      findTextarea().trigger('keydown.enter', {
+        metaKey: true,
+      });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('submitForm')).toBeTruthy();
+      });
+    });
+
+    it('emits input event on changing textarea content', () => {
+      findTextarea().setValue('test2');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('input')).toBeTruthy();
+      });
+    });
+
+    it('emits cancelForm event on Escape key if text was not changed', () => {
+      findTextarea().trigger('keyup.esc');
+
+      expect(wrapper.emitted('cancelForm')).toBeTruthy();
+    });
+
+    it('opens confirmation modal on Escape key when text has changed', () => {
+      wrapper.setProps({ value: 'test2' });
+
+      return wrapper.vm.$nextTick().then(() => {
+        findTextarea().trigger('keyup.esc');
+        expect(showModal).toHaveBeenCalled();
+      });
+    });
+
+    it('emits cancelForm event on Cancel button click if text was not changed', () => {
+      findCancelButton().trigger('click');
+
+      expect(wrapper.emitted('cancelForm')).toBeTruthy();
+    });
+
+    it('opens confirmation modal on Cancel button click when text has changed', () => {
+      wrapper.setProps({ value: 'test2' });
+
+      return wrapper.vm.$nextTick().then(() => {
+        findCancelButton().trigger('click');
+        expect(showModal).toHaveBeenCalled();
+      });
+    });
+
+    it('emits cancelForm event on modal Ok button click', () => {
+      findTextarea().trigger('keyup.esc');
+      findModal().vm.$emit('ok');
+
+      expect(wrapper.emitted('cancelForm')).toBeTruthy();
+    });
+  });
+});

spec/frontend/design_management_new/components/design_notes/toggle_replies_widget_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlIcon, GlButton, GlLink } from '@gitlab/ui';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+import ToggleRepliesWidget from '~/design_management_new/components/design_notes/toggle_replies_widget.vue';
+import notes from '../../mock_data/notes';
+
+describe('Toggle replies widget component', () => {
+  let wrapper;
+
+  const findToggleWrapper = () => wrapper.find('[data-testid="toggle-comments-wrapper"]');
+  const findIcon = () => wrapper.find(GlIcon);
+  const findButton = () => wrapper.find(GlButton);
+  const findAuthorLink = () => wrapper.find(GlLink);
+  const findTimeAgo = () => wrapper.find(TimeAgoTooltip);
+
+  function createComponent(props = {}) {
+    wrapper = shallowMount(ToggleRepliesWidget, {
+      propsData: {
+        collapsed: true,
+        replies: notes,
+        ...props,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when replies are collapsed', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('should not have expanded class', () => {
+      expect(findToggleWrapper().classes()).not.toContain('expanded');
+    });
+
+    it('should render chevron-right icon', () => {
+      expect(findIcon().props('name')).toBe('chevron-right');
+    });
+
+    it('should have replies length on button', () => {
+      expect(findButton().text()).toBe('2 replies');
+    });
+
+    it('should render a link to the last reply author', () => {
+      expect(findAuthorLink().exists()).toBe(true);
+      expect(findAuthorLink().text()).toBe(notes[1].author.name);
+      expect(findAuthorLink().attributes('href')).toBe(notes[1].author.webUrl);
+    });
+
+    it('should render correct time ago tooltip', () => {
+      expect(findTimeAgo().exists()).toBe(true);
+      expect(findTimeAgo().props('time')).toBe(notes[1].createdAt);
+    });
+  });
+
+  describe('when replies are expanded', () => {
+    beforeEach(() => {
+      createComponent({ collapsed: false });
+    });
+
+    it('should have expanded class', () => {
+      expect(findToggleWrapper().classes()).toContain('expanded');
+    });
+
+    it('should render chevron-down icon', () => {
+      expect(findIcon().props('name')).toBe('chevron-down');
+    });
+
+    it('should have Collapse replies text on button', () => {
+      expect(findButton().text()).toBe('Collapse replies');
+    });
+
+    it('should not have a link to the last reply author', () => {
+      expect(findAuthorLink().exists()).toBe(false);
+    });
+
+    it('should not render time ago tooltip', () => {
+      expect(findTimeAgo().exists()).toBe(false);
+    });
+  });
+
+  it('should emit toggle event on icon click', () => {
+    createComponent();
+    findIcon().vm.$emit('click', new MouseEvent('click'));
+
+    expect(wrapper.emitted('toggle')).toHaveLength(1);
+  });
+
+  it('should emit toggle event on button click', () => {
+    createComponent();
+    findButton().vm.$emit('click', new MouseEvent('click'));
+
+    expect(wrapper.emitted('toggle')).toHaveLength(1);
+  });
+});

spec/frontend/design_management_new/components/design_overlay_spec.js

+import { mount } from '@vue/test-utils';
+import DesignOverlay from '~/design_management_new/components/design_overlay.vue';
+import updateActiveDiscussion from '~/design_management_new/graphql/mutations/update_active_discussion.mutation.graphql';
+import notes from '../mock_data/notes';
+import { ACTIVE_DISCUSSION_SOURCE_TYPES } from '~/design_management_new/constants';
+
+const mutate = jest.fn(() => Promise.resolve());
+
+describe('Design overlay component', () => {
+  let wrapper;
+
+  const mockDimensions = { width: 100, height: 100 };
+
+  const findOverlay = () => wrapper.find('.image-diff-overlay');
+  const findAllNotes = () => wrapper.findAll('.js-image-badge');
+  const findCommentBadge = () => wrapper.find('.comment-indicator');
+  const findFirstBadge = () => findAllNotes().at(0);
+  const findSecondBadge = () => findAllNotes().at(1);
+
+  const clickAndDragBadge = (elem, fromPoint, toPoint) => {
+    elem.trigger('mousedown', { clientX: fromPoint.x, clientY: fromPoint.y });
+    return wrapper.vm.$nextTick().then(() => {
+      elem.trigger('mousemove', { clientX: toPoint.x, clientY: toPoint.y });
+      return wrapper.vm.$nextTick();
+    });
+  };
+
+  function createComponent(props = {}, data = {}) {
+    wrapper = mount(DesignOverlay, {
+      propsData: {
+        dimensions: mockDimensions,
+        position: {
+          top: '0',
+          left: '0',
+        },
+        resolvedDiscussionsExpanded: false,
+        ...props,
+      },
+      data() {
+        return {
+          activeDiscussion: {
+            id: null,
+            source: null,
+          },
+          ...data,
+        };
+      },
+      mocks: {
+        $apollo: {
+          mutate,
+        },
+      },
+    });
+  }
+
+  it('should have correct inline style', () => {
+    createComponent();
+
+    expect(wrapper.find('.image-diff-overlay').attributes().style).toBe(
+      'width: 100px; height: 100px; top: 0px; left: 0px;',
+    );
+  });
+
+  it('should emit `openCommentForm` when clicking on overlay', () => {
+    createComponent();
+    const newCoordinates = {
+      x: 10,
+      y: 10,
+    };
+
+    wrapper
+      .find('.image-diff-overlay-add-comment')
+      .trigger('mouseup', { offsetX: newCoordinates.x, offsetY: newCoordinates.y });
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.emitted('openCommentForm')).toEqual([
+        [{ x: newCoordinates.x, y: newCoordinates.y }],
+      ]);
+    });
+  });
+
+  describe('with notes', () => {
+    it('should render only the first note', () => {
+      createComponent({
+        notes,
+      });
+      expect(findAllNotes()).toHaveLength(1);
+    });
+
+    describe('with resolved discussions toggle expanded', () => {
+      beforeEach(() => {
+        createComponent({
+          notes,
+          resolvedDiscussionsExpanded: true,
+        });
+      });
+
+      it('should render all notes', () => {
+        expect(findAllNotes()).toHaveLength(notes.length);
+      });
+
+      it('should have set the correct position for each note badge', () => {
+        expect(findFirstBadge().attributes().style).toBe('left: 10px; top: 15px;');
+        expect(findSecondBadge().attributes().style).toBe('left: 50px; top: 50px;');
+      });
+
+      it('should apply resolved class to the resolved note pin', () => {
+        expect(findSecondBadge().classes()).toContain('resolved');
+      });
+
+      it('when there is an active discussion, should apply inactive class to all pins besides the active one', () => {
+        wrapper.setData({
+          activeDiscussion: {
+            id: notes[0].id,
+            source: 'discussion',
+          },
+        });
+
+        return wrapper.vm.$nextTick().then(() => {
+          expect(findSecondBadge().classes()).toContain('inactive');
+        });
+      });
+    });
+
+    it('should recalculate badges positions on window resize', () => {
+      createComponent({
+        notes,
+        dimensions: {
+          width: 400,
+          height: 400,
+        },
+      });
+
+      expect(findFirstBadge().attributes().style).toBe('left: 40px; top: 60px;');
+
+      wrapper.setProps({
+        dimensions: {
+          width: 200,
+          height: 200,
+        },
+      });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findFirstBadge().attributes().style).toBe('left: 20px; top: 30px;');
+      });
+    });
+
+    it('should call an update active discussion mutation when clicking a note without moving it', () => {
+      const note = notes[0];
+      const { position } = note;
+      const mutationVariables = {
+        mutation: updateActiveDiscussion,
+        variables: {
+          id: note.id,
+          source: ACTIVE_DISCUSSION_SOURCE_TYPES.pin,
+        },
+      };
+
+      findFirstBadge().trigger('mousedown', { clientX: position.x, clientY: position.y });
+
+      return wrapper.vm.$nextTick().then(() => {
+        findFirstBadge().trigger('mouseup', { clientX: position.x, clientY: position.y });
+        expect(mutate).toHaveBeenCalledWith(mutationVariables);
+      });
+    });
+  });
+
+  describe('when moving notes', () => {
+    it('should update badge style when note is being moved', () => {
+      createComponent({
+        notes,
+      });
+
+      const { position } = notes[0];
+
+      return clickAndDragBadge(
+        findFirstBadge(),
+        { x: position.x, y: position.y },
+        { x: 20, y: 20 },
+      ).then(() => {
+        expect(findFirstBadge().attributes().style).toBe('left: 20px; top: 20px; cursor: move;');
+      });
+    });
+
+    it('should emit `moveNote` event when note-moving action ends', () => {
+      createComponent({ notes });
+      const note = notes[0];
+      const { position } = note;
+      const newCoordinates = { x: 20, y: 20 };
+
+      wrapper.setData({
+        movingNoteNewPosition: {
+          ...position,
+          ...newCoordinates,
+        },
+        movingNoteStartPosition: {
+          noteId: notes[0].id,
+          discussionId: notes[0].discussion.id,
+          ...position,
+        },
+      });
+
+      const badge = findFirstBadge();
+      return clickAndDragBadge(badge, { x: position.x, y: position.y }, newCoordinates)
+        .then(() => {
+          badge.trigger('mouseup');
+          return wrapper.vm.$nextTick();
+        })
+        .then(() => {
+          expect(wrapper.emitted('moveNote')).toEqual([
+            [
+              {
+                noteId: notes[0].id,
+                discussionId: notes[0].discussion.id,
+                coordinates: newCoordinates,
+              },
+            ],
+          ]);
+        });
+    });
+
+    describe('without [adminNote] permission', () => {
+      const mockNoteNotAuthorised = {
+        ...notes[0],
+        userPermissions: {
+          adminNote: false,
+        },
+      };
+
+      const mockNoteCoordinates = {
+        x: mockNoteNotAuthorised.position.x,
+        y: mockNoteNotAuthorised.position.y,
+      };
+
+      it('should be unable to move a note', () => {
+        createComponent({
+          dimensions: mockDimensions,
+          notes: [mockNoteNotAuthorised],
+        });
+
+        const badge = findAllNotes().at(0);
+        return clickAndDragBadge(badge, { ...mockNoteCoordinates }, { x: 20, y: 20 }).then(() => {
+          // note position should not change after a click-and-drag attempt
+          expect(findFirstBadge().attributes().style).toContain(
+            `left: ${mockNoteCoordinates.x}px; top: ${mockNoteCoordinates.y}px;`,
+          );
+        });
+      });
+    });
+  });
+
+  describe('with a new form', () => {
+    it('should render a new comment badge', () => {
+      createComponent({
+        currentCommentForm: {
+          ...notes[0].position,
+        },
+      });
+
+      expect(findCommentBadge().exists()).toBe(true);
+      expect(findCommentBadge().attributes().style).toBe('left: 10px; top: 15px;');
+    });
+
+    describe('when moving the comment badge', () => {
+      it('should update badge style to reflect new position', () => {
+        const { position } = notes[0];
+
+        createComponent({
+          currentCommentForm: {
+            ...position,
+          },
+        });
+
+        return clickAndDragBadge(
+          findCommentBadge(),
+          { x: position.x, y: position.y },
+          { x: 20, y: 20 },
+        ).then(() => {
+          expect(findCommentBadge().attributes().style).toBe(
+            'left: 20px; top: 20px; cursor: move;',
+          );
+        });
+      });
+
+      it('should update badge style when note-moving action ends', () => {
+        const { position } = notes[0];
+        createComponent({
+          currentCommentForm: {
+            ...position,
+          },
+        });
+
+        const commentBadge = findCommentBadge();
+        const toPoint = { x: 20, y: 20 };
+
+        return clickAndDragBadge(commentBadge, { x: position.x, y: position.y }, toPoint)
+          .then(() => {
+            commentBadge.trigger('mouseup');
+            // simulates the currentCommentForm being updated in index.vue component, and
+            // propagated back down to this prop
+            wrapper.setProps({
+              currentCommentForm: { height: position.height, width: position.width, ...toPoint },
+            });
+            return wrapper.vm.$nextTick();
+          })
+          .then(() => {
+            expect(commentBadge.attributes().style).toBe('left: 20px; top: 20px;');
+          });
+      });
+
+      it.each`
+        element            | getElementFunc      | event
+        ${'overlay'}       | ${findOverlay}      | ${'mouseleave'}
+        ${'comment badge'} | ${findCommentBadge} | ${'mouseup'}
+      `(
+        'should emit `openCommentForm` event when $event fired on $element element',
+        ({ getElementFunc, event }) => {
+          createComponent({
+            notes,
+            currentCommentForm: {
+              ...notes[0].position,
+            },
+          });
+
+          const newCoordinates = { x: 20, y: 20 };
+          wrapper.setData({
+            movingNoteStartPosition: {
+              ...notes[0].position,
+            },
+            movingNoteNewPosition: {
+              ...notes[0].position,
+              ...newCoordinates,
+            },
+          });
+
+          getElementFunc().trigger(event);
+          return wrapper.vm.$nextTick().then(() => {
+            expect(wrapper.emitted('openCommentForm')).toEqual([[newCoordinates]]);
+          });
+        },
+      );
+    });
+  });
+
+  describe('getMovingNotePositionDelta', () => {
+    it('should calculate delta correctly from state', () => {
+      createComponent();
+
+      wrapper.setData({
+        movingNoteStartPosition: {
+          clientX: 10,
+          clientY: 20,
+        },
+      });
+
+      const mockMouseEvent = {
+        clientX: 30,
+        clientY: 10,
+      };
+
+      expect(wrapper.vm.getMovingNotePositionDelta(mockMouseEvent)).toEqual({
+        deltaX: 20,
+        deltaY: -10,
+      });
+    });
+  });
+
+  describe('isPositionInOverlay', () => {
+    createComponent({ dimensions: mockDimensions });
+
+    it.each`
+      test                        | coordinates           | expectedResult
+      ${'within overlay bounds'}  | ${{ x: 50, y: 50 }}   | ${true}
+      ${'outside overlay bounds'} | ${{ x: 101, y: 101 }} | ${false}
+    `('returns [$expectedResult] when position is $test', ({ coordinates, expectedResult }) => {
+      const position = { ...mockDimensions, ...coordinates };
+
+      expect(wrapper.vm.isPositionInOverlay(position)).toBe(expectedResult);
+    });
+  });
+
+  describe('getNoteRelativePosition', () => {
+    it('calculates position correctly', () => {
+      createComponent({ dimensions: mockDimensions });
+      const position = { x: 50, y: 50, width: 200, height: 200 };
+
+      expect(wrapper.vm.getNoteRelativePosition(position)).toEqual({ left: 25, top: 25 });
+    });
+  });
+
+  describe('canMoveNote', () => {
+    it.each`
+      adminNotePermission | canMoveNoteResult
+      ${true}             | ${true}
+      ${false}            | ${false}
+      ${undefined}        | ${false}
+    `(
+      'returns [$canMoveNoteResult] when [adminNote permission] is [$adminNotePermission]',
+      ({ adminNotePermission, canMoveNoteResult }) => {
+        createComponent();
+
+        const note = {
+          userPermissions: {
+            adminNote: adminNotePermission,
+          },
+        };
+        expect(wrapper.vm.canMoveNote(note)).toBe(canMoveNoteResult);
+      },
+    );
+  });
+});

spec/frontend/design_management_new/components/design_presentation_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignPresentation from '~/design_management_new/components/design_presentation.vue';
+import DesignOverlay from '~/design_management_new/components/design_overlay.vue';
+
+const mockOverlayData = {
+  overlayDimensions: {
+    width: 100,
+    height: 100,
+  },
+  overlayPosition: {
+    top: '0',
+    left: '0',
+  },
+};
+
+describe('Design management design presentation component', () => {
+  let wrapper;
+
+  function createComponent(
+    {
+      image,
+      imageName,
+      discussions = [],
+      isAnnotating = false,
+      resolvedDiscussionsExpanded = false,
+    } = {},
+    data = {},
+    stubs = {},
+  ) {
+    wrapper = shallowMount(DesignPresentation, {
+      propsData: {
+        image,
+        imageName,
+        discussions,
+        isAnnotating,
+        resolvedDiscussionsExpanded,
+      },
+      stubs,
+    });
+
+    wrapper.setData(data);
+    wrapper.element.scrollTo = jest.fn();
+  }
+
+  const findOverlayCommentButton = () => wrapper.find('.image-diff-overlay-add-comment');
+
+  /**
+   * Spy on $refs and mock given values
+   * @param {Object} viewportDimensions {width, height}
+   * @param {Object} childDimensions {width, height}
+   * @param {Float} scrollTopPerc 0 < x < 1
+   * @param {Float} scrollLeftPerc  0 < x < 1
+   */
+  function mockRefDimensions(
+    ref,
+    viewportDimensions,
+    childDimensions,
+    scrollTopPerc,
+    scrollLeftPerc,
+  ) {
+    jest.spyOn(ref, 'scrollWidth', 'get').mockReturnValue(childDimensions.width);
+    jest.spyOn(ref, 'scrollHeight', 'get').mockReturnValue(childDimensions.height);
+    jest.spyOn(ref, 'offsetWidth', 'get').mockReturnValue(viewportDimensions.width);
+    jest.spyOn(ref, 'offsetHeight', 'get').mockReturnValue(viewportDimensions.height);
+    jest
+      .spyOn(ref, 'scrollLeft', 'get')
+      .mockReturnValue((childDimensions.width - viewportDimensions.width) * scrollLeftPerc);
+    jest
+      .spyOn(ref, 'scrollTop', 'get')
+      .mockReturnValue((childDimensions.height - viewportDimensions.height) * scrollTopPerc);
+  }
+
+  function clickDragExplore(startCoords, endCoords, { useTouchEvents, mouseup } = {}) {
+    const event = useTouchEvents
+      ? {
+          mousedown: 'touchstart',
+          mousemove: 'touchmove',
+          mouseup: 'touchend',
+        }
+      : {
+          mousedown: 'mousedown',
+          mousemove: 'mousemove',
+          mouseup: 'mouseup',
+        };
+
+    const addCommentOverlay = findOverlayCommentButton();
+
+    // triggering mouse events on this element best simulates
+    // reality, as it is the lowest-level node that needs to
+    // respond to mouse events
+    addCommentOverlay.trigger(event.mousedown, {
+      clientX: startCoords.clientX,
+      clientY: startCoords.clientY,
+    });
+    return wrapper.vm
+      .$nextTick()
+      .then(() => {
+        addCommentOverlay.trigger(event.mousemove, {
+          clientX: endCoords.clientX,
+          clientY: endCoords.clientY,
+        });
+
+        return wrapper.vm.$nextTick();
+      })
+      .then(() => {
+        if (mouseup) {
+          addCommentOverlay.trigger(event.mouseup);
+          return wrapper.vm.$nextTick();
+        }
+
+        return undefined;
+      });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders image and overlay when image provided', () => {
+    createComponent(
+      {
+        image: 'test.jpg',
+        imageName: 'test',
+      },
+      mockOverlayData,
+    );
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('renders empty state when no image provided', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('openCommentForm event emits correct data', () => {
+    createComponent(
+      {
+        image: 'test.jpg',
+        imageName: 'test',
+      },
+      mockOverlayData,
+    );
+
+    wrapper.vm.openCommentForm({ x: 1, y: 1 });
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.emitted('openCommentForm')).toEqual([
+        [{ ...mockOverlayData.overlayDimensions, x: 1, y: 1 }],
+      ]);
+    });
+  });
+
+  describe('currentCommentForm', () => {
+    it('is null when isAnnotating is false', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        mockOverlayData,
+      );
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.currentCommentForm).toBeNull();
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('is null when isAnnotating is true but annotation position is falsey', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+          isAnnotating: true,
+        },
+        mockOverlayData,
+      );
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.currentCommentForm).toBeNull();
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('is equal to current annotation position when isAnnotating is true', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+          isAnnotating: true,
+        },
+        {
+          ...mockOverlayData,
+          currentAnnotationPosition: {
+            x: 1,
+            y: 1,
+            width: 100,
+            height: 100,
+          },
+        },
+      );
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.currentCommentForm).toEqual({
+          x: 1,
+          y: 1,
+          width: 100,
+          height: 100,
+        });
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+  });
+
+  describe('setOverlayPosition', () => {
+    beforeEach(() => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        mockOverlayData,
+      );
+    });
+
+    afterEach(() => {
+      jest.clearAllMocks();
+    });
+
+    it('sets overlay position correctly when overlay is smaller than viewport', () => {
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetWidth', 'get').mockReturnValue(200);
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetHeight', 'get').mockReturnValue(200);
+
+      wrapper.vm.setOverlayPosition();
+      expect(wrapper.vm.overlayPosition).toEqual({
+        left: `calc(50% - ${mockOverlayData.overlayDimensions.width / 2}px)`,
+        top: `calc(50% - ${mockOverlayData.overlayDimensions.height / 2}px)`,
+      });
+    });
+
+    it('sets overlay position correctly when overlay width is larger than viewports', () => {
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetWidth', 'get').mockReturnValue(50);
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetHeight', 'get').mockReturnValue(200);
+
+      wrapper.vm.setOverlayPosition();
+      expect(wrapper.vm.overlayPosition).toEqual({
+        left: '0',
+        top: `calc(50% - ${mockOverlayData.overlayDimensions.height / 2}px)`,
+      });
+    });
+
+    it('sets overlay position correctly when overlay height is larger than viewports', () => {
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetWidth', 'get').mockReturnValue(200);
+      jest.spyOn(wrapper.vm.$refs.presentationViewport, 'offsetHeight', 'get').mockReturnValue(50);
+
+      wrapper.vm.setOverlayPosition();
+      expect(wrapper.vm.overlayPosition).toEqual({
+        left: `calc(50% - ${mockOverlayData.overlayDimensions.width / 2}px)`,
+        top: '0',
+      });
+    });
+  });
+
+  describe('getViewportCenter', () => {
+    beforeEach(() => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        mockOverlayData,
+      );
+    });
+
+    it('calculate center correctly with no scroll', () => {
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 10, height: 10 },
+        { width: 20, height: 20 },
+        0,
+        0,
+      );
+
+      expect(wrapper.vm.getViewportCenter()).toEqual({
+        x: 5,
+        y: 5,
+      });
+    });
+
+    it('calculate center correctly with some scroll', () => {
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 10, height: 10 },
+        { width: 20, height: 20 },
+        0.5,
+        0.5,
+      );
+
+      expect(wrapper.vm.getViewportCenter()).toEqual({
+        x: 10,
+        y: 10,
+      });
+    });
+
+    it('Returns default case if no overflow (scrollWidth==offsetWidth, etc.)', () => {
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 20, height: 20 },
+        { width: 20, height: 20 },
+        0.5,
+        0.5,
+      );
+
+      expect(wrapper.vm.getViewportCenter()).toEqual({
+        x: 10,
+        y: 10,
+      });
+    });
+  });
+
+  describe('scaleZoomFocalPoint', () => {
+    it('scales focal point correctly when zooming in', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        {
+          ...mockOverlayData,
+          zoomFocalPoint: {
+            x: 5,
+            y: 5,
+            width: 50,
+            height: 50,
+          },
+        },
+      );
+
+      wrapper.vm.scaleZoomFocalPoint();
+      expect(wrapper.vm.zoomFocalPoint).toEqual({
+        x: 10,
+        y: 10,
+        width: 100,
+        height: 100,
+      });
+    });
+
+    it('scales focal point correctly when zooming out', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        {
+          ...mockOverlayData,
+          zoomFocalPoint: {
+            x: 10,
+            y: 10,
+            width: 200,
+            height: 200,
+          },
+        },
+      );
+
+      wrapper.vm.scaleZoomFocalPoint();
+      expect(wrapper.vm.zoomFocalPoint).toEqual({
+        x: 5,
+        y: 5,
+        width: 100,
+        height: 100,
+      });
+    });
+  });
+
+  describe('onImageResize', () => {
+    it('sets zoom focal point on initial load', () => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        mockOverlayData,
+      );
+
+      wrapper.setMethods({
+        shiftZoomFocalPoint: jest.fn(),
+        scaleZoomFocalPoint: jest.fn(),
+        scrollToFocalPoint: jest.fn(),
+      });
+
+      wrapper.vm.onImageResize({ width: 10, height: 10 });
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.shiftZoomFocalPoint).toHaveBeenCalled();
+        expect(wrapper.vm.initialLoad).toBe(false);
+      });
+    });
+
+    it('calls scaleZoomFocalPoint and scrollToFocalPoint after initial load', () => {
+      wrapper.vm.onImageResize({ width: 10, height: 10 });
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.scaleZoomFocalPoint).toHaveBeenCalled();
+        expect(wrapper.vm.scrollToFocalPoint).toHaveBeenCalled();
+      });
+    });
+  });
+
+  describe('onPresentationMousedown', () => {
+    it.each`
+      scenario                        | width  | height
+      ${'width overflows'}            | ${101} | ${100}
+      ${'height overflows'}           | ${100} | ${101}
+      ${'width and height overflows'} | ${200} | ${200}
+    `('sets lastDragPosition when design $scenario', ({ width, height }) => {
+      createComponent();
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 100, height: 100 },
+        { width, height },
+      );
+
+      const newLastDragPosition = { x: 2, y: 2 };
+      wrapper.vm.onPresentationMousedown({
+        clientX: newLastDragPosition.x,
+        clientY: newLastDragPosition.y,
+      });
+
+      expect(wrapper.vm.lastDragPosition).toStrictEqual(newLastDragPosition);
+    });
+
+    it('does not set lastDragPosition if design does not overflow', () => {
+      const lastDragPosition = { x: 1, y: 1 };
+
+      createComponent({}, { lastDragPosition });
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 100, height: 100 },
+        { width: 50, height: 50 },
+      );
+
+      wrapper.vm.onPresentationMousedown({ clientX: 2, clientY: 2 });
+
+      // check lastDragPosition is unchanged
+      expect(wrapper.vm.lastDragPosition).toStrictEqual(lastDragPosition);
+    });
+  });
+
+  describe('getAnnotationPositon', () => {
+    it.each`
+      coordinates               | overlayDimensions                | position
+      ${{ x: 100, y: 100 }}     | ${{ width: 50, height: 50 }}     | ${{ x: 100, y: 100, width: 50, height: 50 }}
+      ${{ x: 100.2, y: 100.5 }} | ${{ width: 50.6, height: 50.0 }} | ${{ x: 100, y: 101, width: 51, height: 50 }}
+    `('returns correct annotation position', ({ coordinates, overlayDimensions, position }) => {
+      createComponent(undefined, {
+        overlayDimensions: {
+          width: overlayDimensions.width,
+          height: overlayDimensions.height,
+        },
+      });
+
+      expect(wrapper.vm.getAnnotationPositon(coordinates)).toStrictEqual(position);
+    });
+  });
+
+  describe('when design is overflowing', () => {
+    beforeEach(() => {
+      createComponent(
+        {
+          image: 'test.jpg',
+          imageName: 'test',
+        },
+        mockOverlayData,
+        {
+          'design-overlay': DesignOverlay,
+        },
+      );
+
+      // mock a design that overflows
+      mockRefDimensions(
+        wrapper.vm.$refs.presentationViewport,
+        { width: 10, height: 10 },
+        { width: 20, height: 20 },
+        0,
+        0,
+      );
+    });
+
+    it('opens a comment form if design was not dragged', () => {
+      const addCommentOverlay = findOverlayCommentButton();
+      const startCoords = {
+        clientX: 1,
+        clientY: 1,
+      };
+
+      addCommentOverlay.trigger('mousedown', {
+        clientX: startCoords.clientX,
+        clientY: startCoords.clientY,
+      });
+
+      return wrapper.vm
+        .$nextTick()
+        .then(() => {
+          addCommentOverlay.trigger('mouseup');
+          return wrapper.vm.$nextTick();
+        })
+        .then(() => {
+          expect(wrapper.emitted('openCommentForm')).toBeDefined();
+        });
+    });
+
+    describe('when clicking and dragging', () => {
+      it.each`
+        description               | useTouchEvents
+        ${'with touch events'}    | ${true}
+        ${'without touch events'} | ${false}
+      `('calls scrollTo with correct arguments $description', ({ useTouchEvents }) => {
+        return clickDragExplore(
+          { clientX: 0, clientY: 0 },
+          { clientX: 10, clientY: 10 },
+          { useTouchEvents },
+        ).then(() => {
+          expect(wrapper.element.scrollTo).toHaveBeenCalledTimes(1);
+          expect(wrapper.element.scrollTo).toHaveBeenCalledWith(-10, -10);
+        });
+      });
+
+      it('does not open a comment form when drag position exceeds buffer', () => {
+        return clickDragExplore(
+          { clientX: 0, clientY: 0 },
+          { clientX: 10, clientY: 10 },
+          { mouseup: true },
+        ).then(() => {
+          expect(wrapper.emitted('openCommentForm')).toBeFalsy();
+        });
+      });
+
+      it('opens a comment form when drag position is within buffer', () => {
+        return clickDragExplore(
+          { clientX: 0, clientY: 0 },
+          { clientX: 1, clientY: 0 },
+          { mouseup: true },
+        ).then(() => {
+          expect(wrapper.emitted('openCommentForm')).toBeDefined();
+        });
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/design_scaler_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignScaler from '~/design_management_new/components/design_scaler.vue';
+
+describe('Design management design scaler component', () => {
+  let wrapper;
+
+  function createComponent(propsData, data = {}) {
+    wrapper = shallowMount(DesignScaler, {
+      propsData,
+    });
+    wrapper.setData(data);
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const getButton = type => {
+    const buttonTypeOrder = ['minus', 'reset', 'plus'];
+    const buttons = wrapper.findAll('button');
+    return buttons.at(buttonTypeOrder.indexOf(type));
+  };
+
+  it('emits @scale event when "plus" button clicked', () => {
+    createComponent();
+
+    getButton('plus').trigger('click');
+    expect(wrapper.emitted('scale')).toEqual([[1.2]]);
+  });
+
+  it('emits @scale event when "reset" button clicked (scale > 1)', () => {
+    createComponent({}, { scale: 1.6 });
+    return wrapper.vm.$nextTick().then(() => {
+      getButton('reset').trigger('click');
+      expect(wrapper.emitted('scale')).toEqual([[1]]);
+    });
+  });
+
+  it('emits @scale event when "minus" button clicked (scale > 1)', () => {
+    createComponent({}, { scale: 1.6 });
+
+    return wrapper.vm.$nextTick().then(() => {
+      getButton('minus').trigger('click');
+      expect(wrapper.emitted('scale')).toEqual([[1.4]]);
+    });
+  });
+
+  it('minus and reset buttons are disabled when scale === 1', () => {
+    createComponent();
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('minus and reset buttons are enabled when scale > 1', () => {
+    createComponent({}, { scale: 1.2 });
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('plus button is disabled when scale === 2', () => {
+    createComponent({}, { scale: 2 });
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+});

spec/frontend/design_management_new/components/design_sidebar_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlCollapse, GlPopover } from '@gitlab/ui';
+import Cookies from 'js-cookie';
+import DesignSidebar from '~/design_management_new/components/design_sidebar.vue';
+import Participants from '~/sidebar/components/participants/participants.vue';
+import DesignDiscussion from '~/design_management_new/components/design_notes/design_discussion.vue';
+import design from '../mock_data/design';
+import updateActiveDiscussionMutation from '~/design_management_new/graphql/mutations/update_active_discussion.mutation.graphql';
+
+const updateActiveDiscussionMutationVariables = {
+  mutation: updateActiveDiscussionMutation,
+  variables: {
+    id: design.discussions.nodes[0].notes.nodes[0].id,
+    source: 'discussion',
+  },
+};
+
+const $route = {
+  params: {
+    id: '1',
+  },
+};
+
+const cookieKey = 'hide_design_resolved_comments_popover';
+
+const mutate = jest.fn().mockResolvedValue();
+
+describe('Design management design sidebar component', () => {
+  let wrapper;
+
+  const findDiscussions = () => wrapper.findAll(DesignDiscussion);
+  const findFirstDiscussion = () => findDiscussions().at(0);
+  const findUnresolvedDiscussions = () => wrapper.findAll('[data-testid="unresolved-discussion"]');
+  const findResolvedDiscussions = () => wrapper.findAll('[data-testid="resolved-discussion"]');
+  const findParticipants = () => wrapper.find(Participants);
+  const findCollapsible = () => wrapper.find(GlCollapse);
+  const findToggleResolvedCommentsButton = () => wrapper.find('[data-testid="resolved-comments"]');
+  const findPopover = () => wrapper.find(GlPopover);
+  const findNewDiscussionDisclaimer = () =>
+    wrapper.find('[data-testid="new-discussion-disclaimer"]');
+
+  function createComponent(props = {}) {
+    wrapper = shallowMount(DesignSidebar, {
+      propsData: {
+        design,
+        resolvedDiscussionsExpanded: false,
+        markdownPreviewPath: '',
+        ...props,
+      },
+      mocks: {
+        $route,
+        $apollo: {
+          mutate,
+        },
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders participants', () => {
+    createComponent();
+
+    expect(findParticipants().exists()).toBe(true);
+  });
+
+  it('passes the correct amount of participants to the Participants component', () => {
+    createComponent();
+
+    expect(findParticipants().props('participants')).toHaveLength(1);
+  });
+
+  describe('when has no discussions', () => {
+    beforeEach(() => {
+      createComponent({
+        design: {
+          ...design,
+          discussions: {
+            nodes: [],
+          },
+        },
+      });
+    });
+
+    it('does not render discussions', () => {
+      expect(findDiscussions().exists()).toBe(false);
+    });
+
+    it('renders a message about possibility to create a new discussion', () => {
+      expect(findNewDiscussionDisclaimer().exists()).toBe(true);
+    });
+  });
+
+  describe('when has discussions', () => {
+    beforeEach(() => {
+      Cookies.set(cookieKey, true);
+      createComponent();
+    });
+
+    it('renders correct amount of unresolved discussions', () => {
+      expect(findUnresolvedDiscussions()).toHaveLength(1);
+    });
+
+    it('renders correct amount of resolved discussions', () => {
+      expect(findResolvedDiscussions()).toHaveLength(1);
+    });
+
+    it('has resolved comments collapsible collapsed', () => {
+      expect(findCollapsible().attributes('visible')).toBeUndefined();
+    });
+
+    it('emits toggleResolveComments event on resolve comments button click', () => {
+      findToggleResolvedCommentsButton().vm.$emit('click');
+      expect(wrapper.emitted('toggleResolvedComments')).toHaveLength(1);
+    });
+
+    it('opens a collapsible when resolvedDiscussionsExpanded prop changes to true', () => {
+      expect(findCollapsible().attributes('visible')).toBeUndefined();
+      wrapper.setProps({
+        resolvedDiscussionsExpanded: true,
+      });
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findCollapsible().attributes('visible')).toBe('true');
+      });
+    });
+
+    it('does not popover about resolved comments', () => {
+      expect(findPopover().exists()).toBe(false);
+    });
+
+    it('sends a mutation to set an active discussion when clicking on a discussion', () => {
+      findFirstDiscussion().trigger('click');
+
+      expect(mutate).toHaveBeenCalledWith(updateActiveDiscussionMutationVariables);
+    });
+
+    it('sends a mutation to reset an active discussion when clicking outside of discussion', () => {
+      wrapper.trigger('click');
+
+      expect(mutate).toHaveBeenCalledWith({
+        ...updateActiveDiscussionMutationVariables,
+        variables: { id: undefined, source: 'discussion' },
+      });
+    });
+
+    it('emits correct event on discussion create note error', () => {
+      findFirstDiscussion().vm.$emit('createNoteError', 'payload');
+      expect(wrapper.emitted('onDesignDiscussionError')).toEqual([['payload']]);
+    });
+
+    it('emits correct event on discussion update note error', () => {
+      findFirstDiscussion().vm.$emit('updateNoteError', 'payload');
+      expect(wrapper.emitted('updateNoteError')).toEqual([['payload']]);
+    });
+
+    it('emits correct event on discussion resolve error', () => {
+      findFirstDiscussion().vm.$emit('resolveDiscussionError', 'payload');
+      expect(wrapper.emitted('resolveDiscussionError')).toEqual([['payload']]);
+    });
+
+    it('changes prop correctly on opening discussion form', () => {
+      findFirstDiscussion().vm.$emit('openForm', 'some-id');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findFirstDiscussion().props('discussionWithOpenForm')).toBe('some-id');
+      });
+    });
+  });
+
+  describe('when all discussions are resolved', () => {
+    beforeEach(() => {
+      createComponent({
+        design: {
+          ...design,
+          discussions: {
+            nodes: [
+              {
+                id: 'discussion-id',
+                replyId: 'discussion-reply-id',
+                resolved: true,
+                notes: {
+                  nodes: [
+                    {
+                      id: 'note-id',
+                      body: '123',
+                      author: {
+                        name: 'Administrator',
+                        username: 'root',
+                        webUrl: 'link-to-author',
+                        avatarUrl: 'link-to-avatar',
+                      },
+                    },
+                  ],
+                },
+              },
+            ],
+          },
+        },
+      });
+    });
+
+    it('renders a message about possibility to create a new discussion', () => {
+      expect(findNewDiscussionDisclaimer().exists()).toBe(true);
+    });
+
+    it('does not render unresolved discussions', () => {
+      expect(findUnresolvedDiscussions()).toHaveLength(0);
+    });
+  });
+
+  describe('when showing resolved discussions for the first time', () => {
+    beforeEach(() => {
+      Cookies.set(cookieKey, false);
+      createComponent();
+    });
+
+    it('renders a popover if we show resolved comments collapsible for the first time', () => {
+      expect(findPopover().exists()).toBe(true);
+    });
+
+    it('dismisses a popover on the outside click', () => {
+      wrapper.trigger('click');
+      return wrapper.vm.$nextTick(() => {
+        expect(findPopover().exists()).toBe(false);
+      });
+    });
+
+    it(`sets a ${cookieKey} cookie on clicking outside the popover`, () => {
+      jest.spyOn(Cookies, 'set');
+      wrapper.trigger('click');
+      expect(Cookies.set).toHaveBeenCalledWith(cookieKey, 'true', { expires: 365 * 10 });
+    });
+  });
+});

spec/frontend/design_management_new/components/image_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlIcon } from '@gitlab/ui';
+import DesignImage from '~/design_management_new/components/image.vue';
+
+describe('Design management large image component', () => {
+  let wrapper;
+
+  function createComponent(propsData, data = {}) {
+    wrapper = shallowMount(DesignImage, {
+      propsData,
+    });
+    wrapper.setData(data);
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders loading state', () => {
+    createComponent({
+      isLoading: true,
+    });
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders image', () => {
+    createComponent({
+      isLoading: false,
+      image: 'test.jpg',
+      name: 'test',
+    });
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('sets correct classes and styles if imageStyle is set', () => {
+    createComponent(
+      {
+        isLoading: false,
+        image: 'test.jpg',
+        name: 'test',
+      },
+      {
+        imageStyle: {
+          width: '100px',
+          height: '100px',
+        },
+      },
+    );
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('renders media broken icon on error', () => {
+    createComponent({
+      isLoading: false,
+      image: 'test.jpg',
+      name: 'test',
+    });
+
+    const image = wrapper.find('img');
+    image.trigger('error');
+    return wrapper.vm.$nextTick().then(() => {
+      expect(image.isVisible()).toBe(false);
+      expect(wrapper.find(GlIcon).element).toMatchSnapshot();
+    });
+  });
+
+  describe('zoom', () => {
+    const baseImageWidth = 100;
+    const baseImageHeight = 100;
+
+    beforeEach(() => {
+      createComponent(
+        {
+          isLoading: false,
+          image: 'test.jpg',
+          name: 'test',
+        },
+        {
+          imageStyle: {
+            width: `${baseImageWidth}px`,
+            height: `${baseImageHeight}px`,
+          },
+          baseImageSize: {
+            width: baseImageWidth,
+            height: baseImageHeight,
+          },
+        },
+      );
+
+      jest.spyOn(wrapper.vm.$refs.contentImg, 'offsetWidth', 'get').mockReturnValue(baseImageWidth);
+      jest
+        .spyOn(wrapper.vm.$refs.contentImg, 'offsetHeight', 'get')
+        .mockReturnValue(baseImageHeight);
+    });
+
+    it('emits @resize event on zoom', () => {
+      const zoomAmount = 2;
+      wrapper.vm.zoom(zoomAmount);
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('resize')).toEqual([
+          [{ width: baseImageWidth * zoomAmount, height: baseImageHeight * zoomAmount }],
+        ]);
+      });
+    });
+
+    it('emits @resize event with base image size when scale=1', () => {
+      wrapper.vm.zoom(1);
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('resize')).toEqual([
+          [{ width: baseImageWidth, height: baseImageHeight }],
+        ]);
+      });
+    });
+
+    it('sets image style when zoomed', () => {
+      const zoomAmount = 2;
+      wrapper.vm.zoom(zoomAmount);
+      expect(wrapper.vm.imageStyle).toEqual({
+        width: `${baseImageWidth * zoomAmount}px`,
+        height: `${baseImageHeight * zoomAmount}px`,
+      });
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/list/__snapshots__/item_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management list item component when item appears in view after image is loaded renders media broken icon when image onerror triggered 1`] = `
+<gl-icon-stub
+  class="text-secondary"
+  name="media-broken"
+  size="32"
+/>
+`;
+
+exports[`Design management list item component with no notes renders item with correct status icon for creation event 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <div
+      class="design-event position-absolute"
+    >
+      <span
+        aria-label="Added in this version"
+        title="Added in this version"
+      >
+        <icon-stub
+          class="text-success-500"
+          name="file-addition-solid"
+          size="18"
+        />
+      </span>
+    </div>
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <!---->
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with no notes renders item with correct status icon for deletion event 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <div
+      class="design-event position-absolute"
+    >
+      <span
+        aria-label="Deleted in this version"
+        title="Deleted in this version"
+      >
+        <icon-stub
+          class="text-danger-500"
+          name="file-deletion-solid"
+          size="18"
+        />
+      </span>
+    </div>
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <!---->
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with no notes renders item with correct status icon for modification event 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <div
+      class="design-event position-absolute"
+    >
+      <span
+        aria-label="Modified in this version"
+        title="Modified in this version"
+      >
+        <icon-stub
+          class="text-primary-500"
+          name="file-modified-solid"
+          size="18"
+        />
+      </span>
+    </div>
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <!---->
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with no notes renders item with no status icon for none event 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <!---->
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <!---->
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with no notes renders loading spinner when isUploading is true 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <!---->
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <gl-loading-icon-stub
+        color="orange"
+        label="Loading"
+        size="md"
+      />
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+        style="display: none;"
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <!---->
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with notes renders item with multiple comments 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <!---->
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <div
+      class="ml-auto d-flex align-items-center text-secondary"
+    >
+      <icon-stub
+        class="ml-1"
+        name="comments"
+        size="16"
+      />
+       
+      <span
+        aria-label="2 comments"
+        class="ml-1"
+      >
+        
+        2
+      
+      </span>
+    </div>
+  </div>
+</router-link-stub>
+`;
+
+exports[`Design management list item component with notes renders item with single comment 1`] = `
+<router-link-stub
+  class="card cursor-pointer text-plain js-design-list-item design-list-item"
+  to="[object Object]"
+>
+  <div
+    class="card-body p-0 d-flex-center overflow-hidden position-relative"
+  >
+    <!---->
+     
+    <gl-intersection-observer-stub
+      options="[object Object]"
+    >
+      <!---->
+       
+      <img
+        alt="test"
+        class="block mx-auto mw-100 mh-100 design-img"
+        data-qa-selector="design_image"
+        src=""
+      />
+    </gl-intersection-observer-stub>
+  </div>
+   
+  <div
+    class="card-footer d-flex w-100"
+  >
+    <div
+      class="d-flex flex-column str-truncated-100"
+    >
+      <span
+        class="bold str-truncated-100"
+        data-qa-selector="design_file_name"
+      >
+        test
+      </span>
+       
+      <span
+        class="str-truncated-100"
+      >
+        
+        Updated 
+        <timeago-stub
+          cssclass=""
+          time="01-01-2019"
+          tooltipplacement="bottom"
+        />
+      </span>
+    </div>
+     
+    <div
+      class="ml-auto d-flex align-items-center text-secondary"
+    >
+      <icon-stub
+        class="ml-1"
+        name="comments"
+        size="16"
+      />
+       
+      <span
+        aria-label="1 comment"
+        class="ml-1"
+      >
+        
+        1
+      
+      </span>
+    </div>
+  </div>
+</router-link-stub>
+`;

spec/frontend/design_management_new/components/list/item_spec.js

+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { GlIcon, GlLoadingIcon, GlIntersectionObserver } from '@gitlab/ui';
+import VueRouter from 'vue-router';
+import Item from '~/design_management_new/components/list/item.vue';
+
+const localVue = createLocalVue();
+localVue.use(VueRouter);
+const router = new VueRouter();
+
+// Referenced from: doc/api/graphql/reference/gitlab_schema.graphql:DesignVersionEvent
+const DESIGN_VERSION_EVENT = {
+  CREATION: 'CREATION',
+  DELETION: 'DELETION',
+  MODIFICATION: 'MODIFICATION',
+  NO_CHANGE: 'NONE',
+};
+
+describe('Design management list item component', () => {
+  let wrapper;
+
+  function createComponent({
+    notesCount = 0,
+    event = DESIGN_VERSION_EVENT.NO_CHANGE,
+    isUploading = false,
+    imageLoading = false,
+  } = {}) {
+    wrapper = shallowMount(Item, {
+      localVue,
+      router,
+      propsData: {
+        id: 1,
+        filename: 'test',
+        image: 'http://via.placeholder.com/300',
+        isUploading,
+        event,
+        notesCount,
+        updatedAt: '01-01-2019',
+      },
+      data() {
+        return {
+          imageLoading,
+        };
+      },
+      stubs: ['router-link'],
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when item is not in view', () => {
+    it('image is not rendered', () => {
+      createComponent();
+
+      const image = wrapper.find('img');
+      expect(image.attributes('src')).toBe('');
+    });
+  });
+
+  describe('when item appears in view', () => {
+    let image;
+    let glIntersectionObserver;
+
+    beforeEach(() => {
+      createComponent();
+      image = wrapper.find('img');
+      glIntersectionObserver = wrapper.find(GlIntersectionObserver);
+
+      glIntersectionObserver.vm.$emit('appear');
+      return wrapper.vm.$nextTick();
+    });
+
+    describe('before image is loaded', () => {
+      it('renders loading spinner', () => {
+        expect(wrapper.find(GlLoadingIcon)).toExist();
+      });
+    });
+
+    describe('after image is loaded', () => {
+      beforeEach(() => {
+        image.trigger('load');
+        return wrapper.vm.$nextTick();
+      });
+
+      it('renders an image', () => {
+        expect(image.attributes('src')).toBe('http://via.placeholder.com/300');
+        expect(image.isVisible()).toBe(true);
+      });
+
+      it('renders media broken icon when image onerror triggered', () => {
+        image.trigger('error');
+        return wrapper.vm.$nextTick().then(() => {
+          expect(image.isVisible()).toBe(false);
+          expect(wrapper.find(GlIcon).element).toMatchSnapshot();
+        });
+      });
+
+      describe('when imageV432x230 and image provided', () => {
+        it('renders imageV432x230 image', () => {
+          const mockSrc = 'mock-imageV432x230-url';
+          wrapper.setProps({ imageV432x230: mockSrc });
+
+          return wrapper.vm.$nextTick().then(() => {
+            expect(image.attributes('src')).toBe(mockSrc);
+          });
+        });
+      });
+
+      describe('when image disappears from view and then reappears', () => {
+        beforeEach(() => {
+          glIntersectionObserver.vm.$emit('appear');
+          return wrapper.vm.$nextTick();
+        });
+
+        it('renders an image', () => {
+          expect(image.isVisible()).toBe(true);
+        });
+      });
+    });
+  });
+
+  describe('with notes', () => {
+    it('renders item with single comment', () => {
+      createComponent({ notesCount: 1 });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('renders item with multiple comments', () => {
+      createComponent({ notesCount: 2 });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('with no notes', () => {
+    it('renders item with no status icon for none event', () => {
+      createComponent();
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('renders item with correct status icon for modification event', () => {
+      createComponent({ event: DESIGN_VERSION_EVENT.MODIFICATION });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('renders item with correct status icon for deletion event', () => {
+      createComponent({ event: DESIGN_VERSION_EVENT.DELETION });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('renders item with correct status icon for creation event', () => {
+      createComponent({ event: DESIGN_VERSION_EVENT.CREATION });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('renders loading spinner when isUploading is true', () => {
+      createComponent({ isUploading: true });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+});

spec/frontend/design_management_new/components/toolbar/__snapshots__/index_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management toolbar component renders design and updated data 1`] = `
+<header
+  class="d-flex p-2 bg-white align-items-center js-design-header"
+>
+  <a
+    aria-label="Go back to designs"
+    class="mr-3 text-plain d-flex justify-content-center align-items-center"
+  >
+    <icon-stub
+      name="close"
+      size="18"
+    />
+  </a>
+   
+  <div
+    class="overflow-hidden d-flex align-items-center"
+  >
+    <h2
+      class="m-0 str-truncated-100 gl-font-base"
+    >
+      test.jpg
+    </h2>
+     
+    <small
+      class="text-secondary"
+    >
+      Updated 1 hour ago by Test Name
+    </small>
+  </div>
+   
+  <pagination-stub
+    class="ml-auto flex-shrink-0"
+    id="1"
+  />
+   
+  <gl-deprecated-button-stub
+    class="mr-2"
+    href="/-/designs/306/7f747adcd4693afadbe968d7ba7d983349b9012d"
+    size="md"
+    variant="secondary"
+  >
+    <icon-stub
+      name="download"
+      size="18"
+    />
+  </gl-deprecated-button-stub>
+   
+  <delete-button-stub
+    buttonclass=""
+    buttonvariant="danger"
+    hasselecteddesigns="true"
+  >
+    <icon-stub
+      name="remove"
+      size="18"
+    />
+  </delete-button-stub>
+</header>
+`;

spec/frontend/design_management_new/components/toolbar/__snapshots__/pagination_button_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management pagination button component disables button when no design is passed 1`] = `
+<router-link-stub
+  aria-label="Test title"
+  class="btn btn-default disabled"
+  disabled="true"
+  to="[object Object]"
+>
+  <icon-stub
+    name="angle-right"
+    size="16"
+  />
+</router-link-stub>
+`;
+
+exports[`Design management pagination button component renders router-link 1`] = `
+<router-link-stub
+  aria-label="Test title"
+  class="btn btn-default"
+  to="[object Object]"
+>
+  <icon-stub
+    name="angle-right"
+    size="16"
+  />
+</router-link-stub>
+`;

spec/frontend/design_management_new/components/toolbar/__snapshots__/pagination_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management pagination component hides components when designs are empty 1`] = `<!---->`;
+
+exports[`Design management pagination component renders pagination buttons 1`] = `
+<div
+  class="d-flex align-items-center"
+>
+  
+  0 of 2
+  
+  <div
+    class="btn-group ml-3 mr-3"
+  >
+    <pagination-button-stub
+      class="js-previous-design"
+      iconname="angle-left"
+      title="Go to previous design"
+    />
+     
+    <pagination-button-stub
+      class="js-next-design"
+      design="[object Object]"
+      iconname="angle-right"
+      title="Go to next design"
+    />
+  </div>
+</div>
+`;

spec/frontend/design_management_new/components/toolbar/index_spec.js

+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import VueRouter from 'vue-router';
+import Toolbar from '~/design_management_new/components/toolbar/index.vue';
+import DeleteButton from '~/design_management_new/components/delete_button.vue';
+import { DESIGNS_ROUTE_NAME } from '~/design_management_new/router/constants';
+import { GlDeprecatedButton } from '@gitlab/ui';
+
+const localVue = createLocalVue();
+localVue.use(VueRouter);
+const router = new VueRouter();
+
+const RouterLinkStub = {
+  props: {
+    to: {
+      type: Object,
+    },
+  },
+  render(createElement) {
+    return createElement('a', {}, this.$slots.default);
+  },
+};
+
+describe('Design management toolbar component', () => {
+  let wrapper;
+
+  function createComponent(isLoading = false, createDesign = true, props) {
+    const updatedAt = new Date();
+    updatedAt.setHours(updatedAt.getHours() - 1);
+
+    wrapper = shallowMount(Toolbar, {
+      localVue,
+      router,
+      propsData: {
+        id: '1',
+        isLatestVersion: true,
+        isLoading,
+        isDeleting: false,
+        filename: 'test.jpg',
+        updatedAt: updatedAt.toString(),
+        updatedBy: {
+          name: 'Test Name',
+        },
+        image: '/-/designs/306/7f747adcd4693afadbe968d7ba7d983349b9012d',
+        ...props,
+      },
+      stubs: {
+        'router-link': RouterLinkStub,
+      },
+    });
+
+    wrapper.setData({
+      permissions: {
+        createDesign,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders design and updated data', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('links back to designs list', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      const link = wrapper.find('a');
+
+      expect(link.props('to')).toEqual({
+        name: DESIGNS_ROUTE_NAME,
+        query: {
+          version: undefined,
+        },
+      });
+    });
+  });
+
+  it('renders delete button on latest designs version with logged in user', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.find(DeleteButton).exists()).toBe(true);
+    });
+  });
+
+  it('does not render delete button on non-latest version', () => {
+    createComponent(false, true, { isLatestVersion: false });
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.find(DeleteButton).exists()).toBe(false);
+    });
+  });
+
+  it('does not render delete button when user is not logged in', () => {
+    createComponent(false, false);
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.find(DeleteButton).exists()).toBe(false);
+    });
+  });
+
+  it('emits `delete` event on deleteButton `deleteSelectedDesigns` event', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      wrapper.find(DeleteButton).vm.$emit('deleteSelectedDesigns');
+      expect(wrapper.emitted().delete).toBeTruthy();
+    });
+  });
+
+  it('renders download button with correct link', () => {
+    expect(wrapper.find(GlDeprecatedButton).attributes('href')).toBe(
+      '/-/designs/306/7f747adcd4693afadbe968d7ba7d983349b9012d',
+    );
+  });
+});

spec/frontend/design_management_new/components/toolbar/pagination_button_spec.js

+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import VueRouter from 'vue-router';
+import PaginationButton from '~/design_management_new/components/toolbar/pagination_button.vue';
+import { DESIGN_ROUTE_NAME } from '~/design_management_new/router/constants';
+
+const localVue = createLocalVue();
+localVue.use(VueRouter);
+const router = new VueRouter();
+
+describe('Design management pagination button component', () => {
+  let wrapper;
+
+  function createComponent(design = null) {
+    wrapper = shallowMount(PaginationButton, {
+      localVue,
+      router,
+      propsData: {
+        design,
+        title: 'Test title',
+        iconName: 'angle-right',
+      },
+      stubs: ['router-link'],
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('disables button when no design is passed', () => {
+    createComponent();
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders router-link', () => {
+    createComponent({ id: '2' });
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  describe('designLink', () => {
+    it('returns empty link when design is null', () => {
+      createComponent();
+
+      expect(wrapper.vm.designLink).toEqual({});
+    });
+
+    it('returns design link', () => {
+      createComponent({ id: '2', filename: 'test' });
+
+      wrapper.vm.$router.replace('/root/test-project/issues/1/designs/test?version=1');
+
+      expect(wrapper.vm.designLink).toEqual({
+        name: DESIGN_ROUTE_NAME,
+        params: { id: 'test' },
+        query: { version: '1' },
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/toolbar/pagination_spec.js

+/* global Mousetrap */
+import 'mousetrap';
+import { shallowMount } from '@vue/test-utils';
+import Pagination from '~/design_management_new/components/toolbar/pagination.vue';
+import { DESIGN_ROUTE_NAME } from '~/design_management_new/router/constants';
+
+const push = jest.fn();
+const $router = {
+  push,
+};
+
+const $route = {
+  path: '/designs/design-2',
+  query: {},
+};
+
+describe('Design management pagination component', () => {
+  let wrapper;
+
+  function createComponent() {
+    wrapper = shallowMount(Pagination, {
+      propsData: {
+        id: '2',
+      },
+      mocks: {
+        $router,
+        $route,
+      },
+    });
+  }
+
+  beforeEach(() => {
+    createComponent();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('hides components when designs are empty', () => {
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders pagination buttons', () => {
+    wrapper.setData({
+      designs: [{ id: '1' }, { id: '2' }],
+    });
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('keyboard buttons navigation', () => {
+    beforeEach(() => {
+      wrapper.setData({
+        designs: [{ filename: '1' }, { filename: '2' }, { filename: '3' }],
+      });
+    });
+
+    it('routes to previous design on Left button', () => {
+      Mousetrap.trigger('left');
+      expect(push).toHaveBeenCalledWith({
+        name: DESIGN_ROUTE_NAME,
+        params: { id: '1' },
+        query: {},
+      });
+    });
+
+    it('routes to next design on Right button', () => {
+      Mousetrap.trigger('right');
+      expect(push).toHaveBeenCalledWith({
+        name: DESIGN_ROUTE_NAME,
+        params: { id: '3' },
+        query: {},
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/upload/__snapshots__/button_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management upload button component renders inverted upload design button 1`] = `
+<div
+  isinverted="true"
+>
+  <gl-deprecated-button-stub
+    size="md"
+    title="Adding a design with the same filename replaces the file in a new version."
+    variant="success"
+  >
+    
+    Upload designs
+    
+    <!---->
+  </gl-deprecated-button-stub>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+</div>
+`;
+
+exports[`Design management upload button component renders loading icon 1`] = `
+<div>
+  <gl-deprecated-button-stub
+    disabled="true"
+    size="md"
+    title="Adding a design with the same filename replaces the file in a new version."
+    variant="success"
+  >
+    
+    Upload designs
+    
+    <gl-loading-icon-stub
+      class="ml-1"
+      color="orange"
+      inline="true"
+      label="Loading"
+      size="sm"
+    />
+  </gl-deprecated-button-stub>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+</div>
+`;
+
+exports[`Design management upload button component renders upload design button 1`] = `
+<div>
+  <gl-deprecated-button-stub
+    size="md"
+    title="Adding a design with the same filename replaces the file in a new version."
+    variant="success"
+  >
+    
+    Upload designs
+    
+    <!---->
+  </gl-deprecated-button-stub>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+</div>
+`;

spec/frontend/design_management_new/components/upload/__snapshots__/design_dropzone_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management dropzone component when dragging renders correct template when drag event contains files 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style=""
+    >
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style=""
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when dragging renders correct template when drag event contains files and text 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style=""
+    >
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style=""
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when dragging renders correct template when drag event contains text 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style=""
+    >
+      <div
+        class="mw-50 text-center"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when dragging renders correct template when drag event is empty 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style=""
+    >
+      <div
+        class="mw-50 text-center"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when dragging renders correct template when dragging stops 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style="display: none;"
+    >
+      <div
+        class="mw-50 text-center"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when no slot provided renders default dropzone card 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <button
+    class="card design-dropzone-card design-dropzone-border w-100 h-100 d-flex-center p-3"
+  >
+    <div
+      class="d-flex-center flex-column text-center"
+    >
+      <gl-icon-stub
+        class="mb-4"
+        name="doc-new"
+        size="48"
+      />
+       
+      <p>
+        <gl-sprintf-stub
+          message="%{lineOneStart}Drag and drop to upload your designs%{lineOneEnd} or %{linkStart}click to upload%{linkEnd}."
+        />
+      </p>
+    </div>
+  </button>
+   
+  <input
+    accept="image/*"
+    class="hide"
+    multiple="multiple"
+    name="design_file"
+    type="file"
+  />
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style="display: none;"
+    >
+      <div
+        class="mw-50 text-center"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;
+
+exports[`Design management dropzone component when slot provided renders dropzone with slot content 1`] = `
+<div
+  class="w-100 position-relative"
+>
+  <div>
+    dropzone slot
+  </div>
+   
+  <transition-stub
+    name="design-dropzone-fade"
+  >
+    <div
+      class="card design-dropzone-border design-dropzone-overlay w-100 h-100 position-absolute d-flex-center p-3 bg-white"
+      style="display: none;"
+    >
+      <div
+        class="mw-50 text-center"
+      >
+        <h3>
+          Oh no!
+        </h3>
+         
+        <span>
+          You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico.
+        </span>
+      </div>
+       
+      <div
+        class="mw-50 text-center"
+        style="display: none;"
+      >
+        <h3>
+          Incoming!
+        </h3>
+         
+        <span>
+          Drop your designs to start your upload.
+        </span>
+      </div>
+    </div>
+  </transition-stub>
+</div>
+`;

spec/frontend/design_management_new/components/upload/__snapshots__/design_version_dropdown_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design version dropdown component renders design version dropdown button 1`] = `
+<gl-dropdown-stub
+  class="design-version-dropdown"
+  issueiid=""
+  projectpath=""
+  text="Showing Latest Version"
+  variant="link"
+>
+  <gl-dropdown-item-stub>
+    <router-link-stub
+      class="d-flex js-version-link"
+      to="[object Object]"
+    >
+      <div
+        class="flex-grow-1 ml-2"
+      >
+        <div>
+          <strong>
+            Version 2
+            
+            <span>
+              (latest)
+            </span>
+          </strong>
+        </div>
+      </div>
+       
+      <i
+        class="fa fa-check pull-right"
+      />
+    </router-link-stub>
+  </gl-dropdown-item-stub>
+  <gl-dropdown-item-stub>
+    <router-link-stub
+      class="d-flex js-version-link"
+      to="[object Object]"
+    >
+      <div
+        class="flex-grow-1 ml-2"
+      >
+        <div>
+          <strong>
+            Version 1
+            
+            <!---->
+          </strong>
+        </div>
+      </div>
+       
+      <!---->
+    </router-link-stub>
+  </gl-dropdown-item-stub>
+</gl-dropdown-stub>
+`;
+
+exports[`Design management design version dropdown component renders design version list 1`] = `
+<gl-dropdown-stub
+  class="design-version-dropdown"
+  issueiid=""
+  projectpath=""
+  text="Showing Latest Version"
+  variant="link"
+>
+  <gl-dropdown-item-stub>
+    <router-link-stub
+      class="d-flex js-version-link"
+      to="[object Object]"
+    >
+      <div
+        class="flex-grow-1 ml-2"
+      >
+        <div>
+          <strong>
+            Version 2
+            
+            <span>
+              (latest)
+            </span>
+          </strong>
+        </div>
+      </div>
+       
+      <i
+        class="fa fa-check pull-right"
+      />
+    </router-link-stub>
+  </gl-dropdown-item-stub>
+  <gl-dropdown-item-stub>
+    <router-link-stub
+      class="d-flex js-version-link"
+      to="[object Object]"
+    >
+      <div
+        class="flex-grow-1 ml-2"
+      >
+        <div>
+          <strong>
+            Version 1
+            
+            <!---->
+          </strong>
+        </div>
+      </div>
+       
+      <!---->
+    </router-link-stub>
+  </gl-dropdown-item-stub>
+</gl-dropdown-stub>
+`;

spec/frontend/design_management_new/components/upload/button_spec.js

+import { shallowMount } from '@vue/test-utils';
+import UploadButton from '~/design_management_new/components/upload/button.vue';
+
+describe('Design management upload button component', () => {
+  let wrapper;
+
+  function createComponent(isSaving = false, isInverted = false) {
+    wrapper = shallowMount(UploadButton, {
+      propsData: {
+        isSaving,
+        isInverted,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders upload design button', () => {
+    createComponent();
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders inverted upload design button', () => {
+    createComponent(false, true);
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders loading icon', () => {
+    createComponent(true);
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  describe('onFileUploadChange', () => {
+    it('emits upload event', () => {
+      createComponent();
+
+      wrapper.vm.onFileUploadChange({ target: { files: 'test' } });
+
+      expect(wrapper.emitted().upload[0]).toEqual(['test']);
+    });
+  });
+
+  describe('openFileUpload', () => {
+    it('triggers click on input', () => {
+      createComponent();
+
+      const clickSpy = jest.spyOn(wrapper.find('input').element, 'click');
+
+      wrapper.vm.openFileUpload();
+
+      expect(clickSpy).toHaveBeenCalled();
+    });
+  });
+});

spec/frontend/design_management_new/components/upload/design_dropzone_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignDropzone from '~/design_management_new/components/upload/design_dropzone.vue';
+import createFlash from '~/flash';
+
+jest.mock('~/flash');
+
+describe('Design management dropzone component', () => {
+  let wrapper;
+
+  const mockDragEvent = ({ types = ['Files'], files = [] }) => {
+    return { dataTransfer: { types, files } };
+  };
+
+  const findDropzoneCard = () => wrapper.find('.design-dropzone-card');
+
+  function createComponent({ slots = {}, data = {} } = {}) {
+    wrapper = shallowMount(DesignDropzone, {
+      slots,
+      data() {
+        return data;
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when slot provided', () => {
+    it('renders dropzone with slot content', () => {
+      createComponent({
+        slots: {
+          default: ['<div>dropzone slot</div>'],
+        },
+      });
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('when no slot provided', () => {
+    it('renders default dropzone card', () => {
+      createComponent();
+
+      expect(wrapper.element).toMatchSnapshot();
+    });
+
+    it('triggers click event on file input element when clicked', () => {
+      createComponent();
+      const clickSpy = jest.spyOn(wrapper.find('input').element, 'click');
+
+      findDropzoneCard().trigger('click');
+      expect(clickSpy).toHaveBeenCalled();
+    });
+  });
+
+  describe('when dragging', () => {
+    it.each`
+      description                  | eventPayload
+      ${'is empty'}                | ${{}}
+      ${'contains text'}           | ${mockDragEvent({ types: ['text'] })}
+      ${'contains files and text'} | ${mockDragEvent({ types: ['Files', 'text'] })}
+      ${'contains files'}          | ${mockDragEvent({ types: ['Files'] })}
+    `('renders correct template when drag event $description', ({ eventPayload }) => {
+      createComponent();
+
+      wrapper.trigger('dragenter', eventPayload);
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('renders correct template when dragging stops', () => {
+      createComponent();
+
+      wrapper.trigger('dragenter');
+      return wrapper.vm
+        .$nextTick()
+        .then(() => {
+          wrapper.trigger('dragleave');
+          return wrapper.vm.$nextTick();
+        })
+        .then(() => {
+          expect(wrapper.element).toMatchSnapshot();
+        });
+    });
+  });
+
+  describe('when dropping', () => {
+    it('emits upload event', () => {
+      createComponent();
+      const mockFile = { name: 'test', type: 'image/jpg' };
+      const mockEvent = mockDragEvent({ files: [mockFile] });
+
+      wrapper.trigger('dragenter', mockEvent);
+      return wrapper.vm
+        .$nextTick()
+        .then(() => {
+          wrapper.trigger('drop', mockEvent);
+          return wrapper.vm.$nextTick();
+        })
+        .then(() => {
+          expect(wrapper.emitted().change[0]).toEqual([[mockFile]]);
+        });
+    });
+  });
+
+  describe('ondrop', () => {
+    const mockData = { dragCounter: 1, isDragDataValid: true };
+
+    describe('when drag data is valid', () => {
+      it('emits upload event for valid files', () => {
+        createComponent({ data: mockData });
+
+        const mockFile = { type: 'image/jpg' };
+        const mockEvent = mockDragEvent({ files: [mockFile] });
+
+        wrapper.vm.ondrop(mockEvent);
+        expect(wrapper.emitted().change[0]).toEqual([[mockFile]]);
+      });
+
+      it('calls createFlash when files are invalid', () => {
+        createComponent({ data: mockData });
+
+        const mockEvent = mockDragEvent({ files: [{ type: 'audio/midi' }] });
+
+        wrapper.vm.ondrop(mockEvent);
+        expect(createFlash).toHaveBeenCalledTimes(1);
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/upload/design_version_dropdown_spec.js

+import { shallowMount } from '@vue/test-utils';
+import DesignVersionDropdown from '~/design_management_new/components/upload/design_version_dropdown.vue';
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import mockAllVersions from './mock_data/all_versions';
+
+const LATEST_VERSION_ID = 3;
+const PREVIOUS_VERSION_ID = 2;
+
+const designRouteFactory = versionId => ({
+  path: `/designs?version=${versionId}`,
+  query: {
+    version: `${versionId}`,
+  },
+});
+
+const MOCK_ROUTE = {
+  path: '/designs',
+  query: {},
+};
+
+describe('Design management design version dropdown component', () => {
+  let wrapper;
+
+  function createComponent({ maxVersions = -1, $route = MOCK_ROUTE } = {}) {
+    wrapper = shallowMount(DesignVersionDropdown, {
+      propsData: {
+        projectPath: '',
+        issueIid: '',
+      },
+      mocks: {
+        $route,
+      },
+      stubs: ['router-link'],
+    });
+
+    wrapper.setData({
+      allVersions: maxVersions > -1 ? mockAllVersions.slice(0, maxVersions) : mockAllVersions,
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  const findVersionLink = index => wrapper.findAll('.js-version-link').at(index);
+
+  it('renders design version dropdown button', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  it('renders design version list', () => {
+    createComponent();
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('selected version name', () => {
+    it('has "latest" on most recent version item', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findVersionLink(0).text()).toContain('latest');
+      });
+    });
+  });
+
+  describe('versions list', () => {
+    it('displays latest version text by default', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('displays latest version text when only 1 version is present', () => {
+      createComponent({ maxVersions: 1 });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('displays version text when the current version is not the latest', () => {
+      createComponent({ $route: designRouteFactory(PREVIOUS_VERSION_ID) });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe(`Showing Version #1`);
+      });
+    });
+
+    it('displays latest version text when the current version is the latest', () => {
+      createComponent({ $route: designRouteFactory(LATEST_VERSION_ID) });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.find(GlDropdown).attributes('text')).toBe('Showing Latest Version');
+      });
+    });
+
+    it('should have the same length as apollo query', () => {
+      createComponent();
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.findAll(GlDropdownItem)).toHaveLength(wrapper.vm.allVersions.length);
+      });
+    });
+  });
+});

spec/frontend/design_management_new/components/upload/mock_data/all_versions.js

+export default [
+  {
+    node: {
+      id: 'gid://gitlab/DesignManagement::Version/3',
+      sha: '0945756378e0b1588b9dd40d5a6b99e8b7198f55',
+    },
+  },
+  {
+    node: {
+      id: 'gid://gitlab/DesignManagement::Version/2',
+      sha: '5b063fef0cd7213b312db65b30e24f057df21b20',
+    },
+  },
+];

spec/frontend/design_management_new/mock_data/all_versions.js

+export default [
+  {
+    node: {
+      id: 'gid://gitlab/DesignManagement::Version/1',
+      sha: 'b389071a06c153509e11da1f582005b316667001',
+    },
+  },
+];

spec/frontend/design_management_new/mock_data/design.js

+export default {
+  id: 'design-id',
+  filename: 'test.jpg',
+  fullPath: 'full-design-path',
+  image: 'test.jpg',
+  updatedAt: '01-01-2019',
+  updatedBy: {
+    name: 'test',
+  },
+  issue: {
+    title: 'My precious issue',
+    webPath: 'full-issue-path',
+    webUrl: 'full-issue-url',
+    participants: {
+      edges: [
+        {
+          node: {
+            name: 'Administrator',
+            username: 'root',
+            webUrl: 'link-to-author',
+            avatarUrl: 'link-to-avatar',
+          },
+        },
+      ],
+    },
+  },
+  discussions: {
+    nodes: [
+      {
+        id: 'discussion-id',
+        replyId: 'discussion-reply-id',
+        resolved: false,
+        notes: {
+          nodes: [
+            {
+              id: 'note-id',
+              body: '123',
+              author: {
+                name: 'Administrator',
+                username: 'root',
+                webUrl: 'link-to-author',
+                avatarUrl: 'link-to-avatar',
+              },
+            },
+          ],
+        },
+      },
+      {
+        id: 'discussion-resolved',
+        replyId: 'discussion-reply-resolved',
+        resolved: true,
+        notes: {
+          nodes: [
+            {
+              id: 'note-resolved',
+              body: '123',
+              author: {
+                name: 'Administrator',
+                username: 'root',
+                webUrl: 'link-to-author',
+                avatarUrl: 'link-to-avatar',
+              },
+            },
+          ],
+        },
+      },
+    ],
+  },
+  diffRefs: {
+    headSha: 'headSha',
+    baseSha: 'baseSha',
+    startSha: 'startSha',
+  },
+};

spec/frontend/design_management_new/mock_data/designs.js

+import design from './design';
+
+export default {
+  project: {
+    issue: {
+      designCollection: {
+        designs: {
+          edges: [
+            {
+              node: design,
+            },
+          ],
+        },
+      },
+    },
+  },
+};

spec/frontend/design_management_new/mock_data/no_designs.js

+export default {
+  project: {
+    issue: {
+      designCollection: {
+        designs: {
+          edges: [],
+        },
+      },
+    },
+  },
+};

spec/frontend/design_management_new/mock_data/notes.js

+export default [
+  {
+    id: 'note-id-1',
+    index: 1,
+    position: {
+      height: 100,
+      width: 100,
+      x: 10,
+      y: 15,
+    },
+    author: {
+      name: 'John',
+      webUrl: 'link-to-john-profile',
+    },
+    createdAt: '2020-05-08T07:10:45Z',
+    userPermissions: {
+      adminNote: true,
+    },
+    discussion: {
+      id: 'discussion-id-1',
+    },
+    resolved: false,
+  },
+  {
+    id: 'note-id-2',
+    index: 2,
+    position: {
+      height: 50,
+      width: 50,
+      x: 25,
+      y: 25,
+    },
+    author: {
+      name: 'Mary',
+      webUrl: 'link-to-mary-profile',
+    },
+    createdAt: '2020-05-08T07:10:45Z',
+    userPermissions: {
+      adminNote: true,
+    },
+    discussion: {
+      id: 'discussion-id-2',
+    },
+    resolved: true,
+  },
+];

spec/frontend/design_management_new/pages/__snapshots__/index_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management index page designs does not render toolbar when there is no permission 1`] = `
+<div>
+  <!---->
+   
+  <div
+    class="mt-4"
+  >
+    <ol
+      class="list-unstyled row"
+    >
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub
+          class="design-list-item"
+        />
+      </li>
+       
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-1-name"
+            id="design-1"
+            image="design-1-image"
+            notescount="0"
+          />
+        </design-dropzone-stub>
+         
+        <!---->
+      </li>
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-2-name"
+            id="design-2"
+            image="design-2-image"
+            notescount="1"
+          />
+        </design-dropzone-stub>
+         
+        <!---->
+      </li>
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-3-name"
+            id="design-3"
+            image="design-3-image"
+            notescount="0"
+          />
+        </design-dropzone-stub>
+         
+        <!---->
+      </li>
+    </ol>
+  </div>
+   
+  <router-view-stub
+    name="default"
+  />
+</div>
+`;
+
+exports[`Design management index page designs renders designs list and header with upload button 1`] = `
+<div>
+  <header
+    class="row-content-block border-top-0 p-2 d-flex"
+  >
+    <div
+      class="d-flex justify-content-between align-items-center w-100"
+    >
+      <design-version-dropdown-stub />
+       
+      <div
+        class="qa-selector-toolbar d-flex"
+      >
+        <gl-deprecated-button-stub
+          class="mr-2 js-select-all"
+          size="md"
+          variant="link"
+        >
+          Select all
+        </gl-deprecated-button-stub>
+         
+        <div>
+          <delete-button-stub
+            buttonclass="btn-danger btn-inverted mr-2"
+            buttonvariant=""
+          >
+            
+            Delete selected
+            
+            <!---->
+          </delete-button-stub>
+        </div>
+         
+        <upload-button-stub />
+      </div>
+    </div>
+  </header>
+   
+  <div
+    class="mt-4"
+  >
+    <ol
+      class="list-unstyled row"
+    >
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub
+          class="design-list-item"
+        />
+      </li>
+       
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-1-name"
+            id="design-1"
+            image="design-1-image"
+            notescount="0"
+          />
+        </design-dropzone-stub>
+         
+        <input
+          class="design-checkbox"
+          type="checkbox"
+        />
+      </li>
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-2-name"
+            id="design-2"
+            image="design-2-image"
+            notescount="1"
+          />
+        </design-dropzone-stub>
+         
+        <input
+          class="design-checkbox"
+          type="checkbox"
+        />
+      </li>
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub>
+          <design-stub
+            event="NONE"
+            filename="design-3-name"
+            id="design-3"
+            image="design-3-image"
+            notescount="0"
+          />
+        </design-dropzone-stub>
+         
+        <input
+          class="design-checkbox"
+          type="checkbox"
+        />
+      </li>
+    </ol>
+  </div>
+   
+  <router-view-stub
+    name="default"
+  />
+</div>
+`;
+
+exports[`Design management index page designs renders error 1`] = `
+<div>
+  <!---->
+   
+  <div
+    class="mt-4"
+  >
+    <gl-alert-stub
+      dismisslabel="Dismiss"
+      primarybuttonlink=""
+      primarybuttontext=""
+      secondarybuttonlink=""
+      secondarybuttontext=""
+      title=""
+      variant="danger"
+    >
+      
+      An error occurred while loading designs. Please try again.
+    
+    </gl-alert-stub>
+  </div>
+   
+  <router-view-stub
+    name="default"
+  />
+</div>
+`;
+
+exports[`Design management index page designs renders loading icon 1`] = `
+<div>
+  <!---->
+   
+  <div
+    class="mt-4"
+  >
+    <gl-loading-icon-stub
+      color="orange"
+      label="Loading"
+      size="md"
+    />
+  </div>
+   
+  <router-view-stub
+    name="default"
+  />
+</div>
+`;
+
+exports[`Design management index page when has no designs renders empty text 1`] = `
+<div>
+  <!---->
+   
+  <div
+    class="mt-4"
+  >
+    <ol
+      class="list-unstyled row"
+    >
+      <li
+        class="col-md-6 col-lg-4 mb-3"
+      >
+        <design-dropzone-stub
+          class="design-list-item"
+        />
+      </li>
+       
+    </ol>
+  </div>
+   
+  <router-view-stub
+    name="default"
+  />
+</div>
+`;

spec/frontend/design_management_new/pages/design/__snapshots__/index_spec.js.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Design management design index page renders design index 1`] = `
+<div
+  class="design-detail js-design-detail fixed-top w-100 position-bottom-0 d-flex justify-content-center flex-column flex-lg-row"
+>
+  <div
+    class="d-flex overflow-hidden flex-grow-1 flex-column position-relative"
+  >
+    <design-destroyer-stub
+      filenames="test.jpg"
+      iid="1"
+      projectpath=""
+    />
+     
+    <!---->
+     
+    <design-presentation-stub
+      discussions="[object Object],[object Object]"
+      image="test.jpg"
+      imagename="test.jpg"
+      scale="1"
+    />
+     
+    <div
+      class="design-scaler-wrapper position-absolute mb-4 d-flex-center"
+    >
+      <design-scaler-stub />
+    </div>
+  </div>
+   
+  <div
+    class="image-notes"
+  >
+    <h2
+      class="gl-font-weight-bold gl-mt-0"
+    >
+      
+    My precious issue
+  
+    </h2>
+     
+    <a
+      class="gl-text-gray-600 gl-text-decoration-none gl-mb-6 gl-display-block"
+      href="full-issue-url"
+    >
+      ull-issue-path
+    </a>
+     
+    <participants-stub
+      class="gl-mb-4"
+      numberoflessparticipants="7"
+      participants="[object Object]"
+    />
+     
+    <!---->
+     
+    <design-discussion-stub
+      data-testid="unresolved-discussion"
+      designid="test"
+      discussion="[object Object]"
+      discussionwithopenform=""
+      markdownpreviewpath="//preview_markdown?target_type=Issue"
+      noteableid="design-id"
+    />
+     
+    <gl-button-stub
+      category="tertiary"
+      class="link-inherit-color gl-text-black-normal gl-text-decoration-none gl-font-weight-bold gl-mb-4"
+      data-testid="resolved-comments"
+      icon="chevron-right"
+      id="resolved-comments"
+      size="medium"
+      variant="link"
+    >
+      Resolved Comments (1)
+    
+    </gl-button-stub>
+     
+    <gl-popover-stub
+      container="popovercontainer"
+      cssclasses=""
+      placement="top"
+      show="true"
+      target="resolved-comments"
+      title="Resolved Comments"
+    >
+      <p>
+        
+        Comments you resolve can be viewed and unresolved by going to the "Resolved Comments" section below
+      
+      </p>
+       
+      <a
+        href="#"
+        rel="noopener noreferrer"
+        target="_blank"
+      >
+        Learn more about resolving comments
+      </a>
+    </gl-popover-stub>
+     
+    <gl-collapse-stub
+      class="gl-mt-3"
+    >
+      <design-discussion-stub
+        data-testid="resolved-discussion"
+        designid="test"
+        discussion="[object Object]"
+        discussionwithopenform=""
+        markdownpreviewpath="//preview_markdown?target_type=Issue"
+        noteableid="design-id"
+      />
+    </gl-collapse-stub>
+     
+  </div>
+</div>
+`;
+
+exports[`Design management design index page sets loading state 1`] = `
+<div
+  class="design-detail js-design-detail fixed-top w-100 position-bottom-0 d-flex justify-content-center flex-column flex-lg-row"
+>
+  <gl-loading-icon-stub
+    class="align-self-center"
+    color="orange"
+    label="Loading"
+    size="xl"
+  />
+</div>
+`;
+
+exports[`Design management design index page with error GlAlert is rendered in correct position with correct content 1`] = `
+<div
+  class="design-detail js-design-detail fixed-top w-100 position-bottom-0 d-flex justify-content-center flex-column flex-lg-row"
+>
+  <div
+    class="d-flex overflow-hidden flex-grow-1 flex-column position-relative"
+  >
+    <design-destroyer-stub
+      filenames="test.jpg"
+      iid="1"
+      projectpath=""
+    />
+     
+    <div
+      class="p-3"
+    >
+      <gl-alert-stub
+        dismissible="true"
+        dismisslabel="Dismiss"
+        primarybuttonlink=""
+        primarybuttontext=""
+        secondarybuttonlink=""
+        secondarybuttontext=""
+        title=""
+        variant="danger"
+      >
+        
+          woops
+        
+      </gl-alert-stub>
+    </div>
+     
+    <design-presentation-stub
+      discussions=""
+      image="test.jpg"
+      imagename="test.jpg"
+      scale="1"
+    />
+     
+    <div
+      class="design-scaler-wrapper position-absolute mb-4 d-flex-center"
+    >
+      <design-scaler-stub />
+    </div>
+  </div>
+   
+  <div
+    class="image-notes"
+  >
+    <h2
+      class="gl-font-weight-bold gl-mt-0"
+    >
+      
+    My precious issue
+  
+    </h2>
+     
+    <a
+      class="gl-text-gray-600 gl-text-decoration-none gl-mb-6 gl-display-block"
+      href="full-issue-url"
+    >
+      ull-issue-path
+    </a>
+     
+    <participants-stub
+      class="gl-mb-4"
+      numberoflessparticipants="7"
+      participants="[object Object]"
+    />
+     
+    <h2
+      class="new-discussion-disclaimer gl-font-base gl-m-0 gl-mb-4"
+      data-testid="new-discussion-disclaimer"
+    >
+      
+    Click the image where you'd like to start a new discussion
+  
+    </h2>
+      
+    <!---->
+     
+  </div>
+</div>
+`;

spec/frontend/design_management_new/pages/design/index_spec.js

+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import VueRouter from 'vue-router';
+import { GlAlert } from '@gitlab/ui';
+import { ApolloMutation } from 'vue-apollo';
+import createFlash from '~/flash';
+import DesignIndex from '~/design_management_new/pages/design/index.vue';
+import DesignSidebar from '~/design_management_new/components/design_sidebar.vue';
+import DesignPresentation from '~/design_management_new/components/design_presentation.vue';
+import createImageDiffNoteMutation from '~/design_management_new/graphql/mutations/create_image_diff_note.mutation.graphql';
+import design from '../../mock_data/design';
+import mockResponseWithDesigns from '../../mock_data/designs';
+import mockResponseNoDesigns from '../../mock_data/no_designs';
+import mockAllVersions from '../../mock_data/all_versions';
+import {
+  DESIGN_NOT_FOUND_ERROR,
+  DESIGN_VERSION_NOT_EXIST_ERROR,
+} from '~/design_management_new/utils/error_messages';
+import { DESIGNS_ROUTE_NAME } from '~/design_management_new/router/constants';
+import createRouter from '~/design_management_new/router';
+import * as utils from '~/design_management_new/utils/design_management_utils';
+import { DESIGN_DETAIL_LAYOUT_CLASSLIST } from '~/design_management_new/constants';
+
+jest.mock('~/flash');
+jest.mock('mousetrap', () => ({
+  bind: jest.fn(),
+  unbind: jest.fn(),
+}));
+
+const focusInput = jest.fn();
+
+const DesignReplyForm = {
+  template: '<div><textarea ref="textarea"></textarea></div>',
+  methods: {
+    focusInput,
+  },
+};
+
+const localVue = createLocalVue();
+localVue.use(VueRouter);
+
+describe('Design management design index page', () => {
+  let wrapper;
+  let router;
+
+  const newComment = 'new comment';
+  const annotationCoordinates = {
+    x: 10,
+    y: 10,
+    width: 100,
+    height: 100,
+  };
+  const createDiscussionMutationVariables = {
+    mutation: createImageDiffNoteMutation,
+    update: expect.anything(),
+    variables: {
+      input: {
+        body: newComment,
+        noteableId: design.id,
+        position: {
+          headSha: 'headSha',
+          baseSha: 'baseSha',
+          startSha: 'startSha',
+          paths: {
+            newPath: 'full-design-path',
+          },
+          ...annotationCoordinates,
+        },
+      },
+    },
+  };
+
+  const mutate = jest.fn().mockResolvedValue();
+
+  const findDiscussionForm = () => wrapper.find(DesignReplyForm);
+  const findSidebar = () => wrapper.find(DesignSidebar);
+  const findDesignPresentation = () => wrapper.find(DesignPresentation);
+
+  function createComponent(loading = false, data = {}) {
+    const $apollo = {
+      queries: {
+        design: {
+          loading,
+        },
+      },
+      mutate,
+    };
+
+    router = createRouter();
+
+    wrapper = shallowMount(DesignIndex, {
+      propsData: { id: '1' },
+      mocks: { $apollo },
+      stubs: {
+        ApolloMutation,
+        DesignSidebar,
+        DesignReplyForm,
+      },
+      data() {
+        return {
+          issueIid: '1',
+          activeDiscussion: {
+            id: null,
+            source: null,
+          },
+          ...data,
+        };
+      },
+      localVue,
+      router,
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when navigating', () => {
+    it('applies fullscreen layout', () => {
+      const mockEl = {
+        classList: {
+          add: jest.fn(),
+          remove: jest.fn(),
+        },
+      };
+      jest.spyOn(utils, 'getPageLayoutElement').mockReturnValue(mockEl);
+      createComponent(true);
+
+      wrapper.vm.$router.push('/designs/test');
+      expect(mockEl.classList.add).toHaveBeenCalledTimes(1);
+      expect(mockEl.classList.add).toHaveBeenCalledWith(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+    });
+  });
+
+  it('sets loading state', () => {
+    createComponent(true);
+
+    expect(wrapper.element).toMatchSnapshot();
+  });
+
+  it('renders design index', () => {
+    createComponent(false, { design });
+
+    expect(wrapper.element).toMatchSnapshot();
+    expect(wrapper.find(GlAlert).exists()).toBe(false);
+  });
+
+  it('passes correct props to sidebar component', () => {
+    createComponent(false, { design });
+
+    expect(findSidebar().props()).toEqual({
+      design,
+      markdownPreviewPath: '//preview_markdown?target_type=Issue',
+      resolvedDiscussionsExpanded: false,
+    });
+  });
+
+  it('opens a new discussion form', () => {
+    createComponent(false, {
+      design: {
+        ...design,
+        discussions: {
+          nodes: [],
+        },
+      },
+    });
+
+    findDesignPresentation().vm.$emit('openCommentForm', { x: 0, y: 0 });
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(findDiscussionForm().exists()).toBe(true);
+    });
+  });
+
+  it('keeps new discussion form focused', () => {
+    createComponent(false, {
+      design: {
+        ...design,
+        discussions: {
+          nodes: [],
+        },
+      },
+      annotationCoordinates,
+    });
+
+    findDesignPresentation().vm.$emit('openCommentForm', { x: 10, y: 10 });
+
+    expect(focusInput).toHaveBeenCalled();
+  });
+
+  it('sends a mutation on submitting form and closes form', () => {
+    createComponent(false, {
+      design: {
+        ...design,
+        discussions: {
+          nodes: [],
+        },
+      },
+      annotationCoordinates,
+      comment: newComment,
+    });
+
+    findDiscussionForm().vm.$emit('submitForm');
+    expect(mutate).toHaveBeenCalledWith(createDiscussionMutationVariables);
+
+    return wrapper.vm
+      .$nextTick()
+      .then(() => {
+        return mutate({ variables: createDiscussionMutationVariables });
+      })
+      .then(() => {
+        expect(findDiscussionForm().exists()).toBe(false);
+      });
+  });
+
+  it('closes the form and clears the comment on canceling form', () => {
+    createComponent(false, {
+      design: {
+        ...design,
+        discussions: {
+          nodes: [],
+        },
+      },
+      annotationCoordinates,
+      comment: newComment,
+    });
+
+    findDiscussionForm().vm.$emit('cancelForm');
+
+    expect(wrapper.vm.comment).toBe('');
+
+    return wrapper.vm.$nextTick().then(() => {
+      expect(findDiscussionForm().exists()).toBe(false);
+    });
+  });
+
+  describe('with error', () => {
+    beforeEach(() => {
+      createComponent(false, {
+        design: {
+          ...design,
+          discussions: {
+            nodes: [],
+          },
+        },
+        errorMessage: 'woops',
+      });
+    });
+
+    it('GlAlert is rendered in correct position with correct content', () => {
+      expect(wrapper.element).toMatchSnapshot();
+    });
+  });
+
+  describe('onDesignQueryResult', () => {
+    describe('with no designs', () => {
+      it('redirects to /designs', () => {
+        createComponent(true);
+        router.push = jest.fn();
+
+        wrapper.vm.onDesignQueryResult({ data: mockResponseNoDesigns, loading: false });
+        return wrapper.vm.$nextTick().then(() => {
+          expect(createFlash).toHaveBeenCalledTimes(1);
+          expect(createFlash).toHaveBeenCalledWith(DESIGN_NOT_FOUND_ERROR);
+          expect(router.push).toHaveBeenCalledTimes(1);
+          expect(router.push).toHaveBeenCalledWith({ name: DESIGNS_ROUTE_NAME });
+        });
+      });
+    });
+
+    describe('when no design exists for given version', () => {
+      it('redirects to /designs', () => {
+        createComponent(true);
+        wrapper.setData({
+          allVersions: mockAllVersions,
+        });
+
+        // attempt to query for a version of the design that doesn't exist
+        router.push({ query: { version: '999' } });
+        router.push = jest.fn();
+
+        wrapper.vm.onDesignQueryResult({ data: mockResponseWithDesigns, loading: false });
+        return wrapper.vm.$nextTick().then(() => {
+          expect(createFlash).toHaveBeenCalledTimes(1);
+          expect(createFlash).toHaveBeenCalledWith(DESIGN_VERSION_NOT_EXIST_ERROR);
+          expect(router.push).toHaveBeenCalledTimes(1);
+          expect(router.push).toHaveBeenCalledWith({ name: DESIGNS_ROUTE_NAME });
+        });
+      });
+    });
+  });
+});

spec/frontend/design_management_new/pages/index_spec.js

+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { ApolloMutation } from 'vue-apollo';
+import VueRouter from 'vue-router';
+import { GlEmptyState } from '@gitlab/ui';
+import Index from '~/design_management_new/pages/index.vue';
+import uploadDesignQuery from '~/design_management_new/graphql/mutations/upload_design.mutation.graphql';
+import DesignDestroyer from '~/design_management_new/components/design_destroyer.vue';
+import DesignDropzone from '~/design_management_new/components/upload/design_dropzone.vue';
+import DeleteButton from '~/design_management_new/components/delete_button.vue';
+import { DESIGNS_ROUTE_NAME } from '~/design_management_new/router/constants';
+import {
+  EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE,
+  EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE,
+} from '~/design_management_new/utils/error_messages';
+import createFlash from '~/flash';
+import createRouter from '~/design_management_new/router';
+import * as utils from '~/design_management_new/utils/design_management_utils';
+import { DESIGN_DETAIL_LAYOUT_CLASSLIST } from '~/design_management_new/constants';
+
+jest.mock('~/flash.js');
+const mockPageEl = {
+  classList: {
+    remove: jest.fn(),
+  },
+};
+jest.spyOn(utils, 'getPageLayoutElement').mockReturnValue(mockPageEl);
+
+const localVue = createLocalVue();
+const router = createRouter();
+localVue.use(VueRouter);
+
+const mockDesigns = [
+  {
+    id: 'design-1',
+    image: 'design-1-image',
+    filename: 'design-1-name',
+    event: 'NONE',
+    notesCount: 0,
+  },
+  {
+    id: 'design-2',
+    image: 'design-2-image',
+    filename: 'design-2-name',
+    event: 'NONE',
+    notesCount: 1,
+  },
+  {
+    id: 'design-3',
+    image: 'design-3-image',
+    filename: 'design-3-name',
+    event: 'NONE',
+    notesCount: 0,
+  },
+];
+
+const mockVersion = {
+  node: {
+    id: 'gid://gitlab/DesignManagement::Version/1',
+  },
+};
+
+describe('Design management index page', () => {
+  let mutate;
+  let wrapper;
+
+  const findDesignCheckboxes = () => wrapper.findAll('.design-checkbox');
+  const findSelectAllButton = () => wrapper.find('.js-select-all');
+  const findToolbar = () => wrapper.find('.qa-selector-toolbar');
+  const findDeleteButton = () => wrapper.find(DeleteButton);
+  const findDropzone = () => wrapper.findAll(DesignDropzone).at(0);
+  const findFirstDropzoneWithDesign = () => wrapper.findAll(DesignDropzone).at(1);
+
+  function createComponent({
+    loading = false,
+    designs = [],
+    allVersions = [],
+    createDesign = true,
+    stubs = {},
+    mockMutate = jest.fn().mockResolvedValue(),
+  } = {}) {
+    mutate = mockMutate;
+    const $apollo = {
+      queries: {
+        designs: {
+          loading,
+        },
+        permissions: {
+          loading,
+        },
+      },
+      mutate,
+    };
+
+    wrapper = shallowMount(Index, {
+      mocks: { $apollo },
+      localVue,
+      router,
+      stubs: { DesignDestroyer, ApolloMutation, ...stubs },
+      attachToDocument: true,
+    });
+
+    wrapper.setData({
+      designs,
+      allVersions,
+      issueIid: '1',
+      permissions: {
+        createDesign,
+      },
+    });
+  }
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('designs', () => {
+    it('renders loading icon', () => {
+      createComponent({ loading: true });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('renders error', () => {
+      createComponent();
+
+      wrapper.setData({ error: true });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('renders a toolbar with buttons when there are designs', () => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findToolbar().exists()).toBe(true);
+      });
+    });
+
+    it('renders designs list and header with upload button', () => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+
+    it('does not render toolbar when there is no permission', () => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion], createDesign: false });
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      });
+    });
+  });
+
+  describe('when has no designs', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('renders empty text', () =>
+      wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.element).toMatchSnapshot();
+      }));
+
+    it('does not render a toolbar with buttons', () =>
+      wrapper.vm.$nextTick().then(() => {
+        expect(findToolbar().exists()).toBe(false);
+      }));
+  });
+
+  describe('uploading designs', () => {
+    it('calls mutation on upload', () => {
+      createComponent({ stubs: { GlEmptyState } });
+
+      const mutationVariables = {
+        update: expect.anything(),
+        context: {
+          hasUpload: true,
+        },
+        mutation: uploadDesignQuery,
+        variables: {
+          files: [{ name: 'test' }],
+          projectPath: '',
+          iid: '1',
+        },
+        optimisticResponse: {
+          __typename: 'Mutation',
+          designManagementUpload: {
+            __typename: 'DesignManagementUploadPayload',
+            designs: [
+              {
+                __typename: 'Design',
+                id: expect.anything(),
+                image: '',
+                imageV432x230: '',
+                filename: 'test',
+                fullPath: '',
+                event: 'NONE',
+                notesCount: 0,
+                diffRefs: {
+                  __typename: 'DiffRefs',
+                  baseSha: '',
+                  startSha: '',
+                  headSha: '',
+                },
+                discussions: {
+                  __typename: 'DesignDiscussion',
+                  nodes: [],
+                },
+                versions: {
+                  __typename: 'DesignVersionConnection',
+                  edges: {
+                    __typename: 'DesignVersionEdge',
+                    node: {
+                      __typename: 'DesignVersion',
+                      id: expect.anything(),
+                      sha: expect.anything(),
+                    },
+                  },
+                },
+              },
+            ],
+            skippedDesigns: [],
+            errors: [],
+          },
+        },
+      };
+
+      return wrapper.vm.$nextTick().then(() => {
+        findDropzone().vm.$emit('change', [{ name: 'test' }]);
+        expect(mutate).toHaveBeenCalledWith(mutationVariables);
+        expect(wrapper.vm.filesToBeSaved).toEqual([{ name: 'test' }]);
+        expect(wrapper.vm.isSaving).toBeTruthy();
+      });
+    });
+
+    it('sets isSaving', () => {
+      createComponent();
+
+      const uploadDesign = wrapper.vm.onUploadDesign([
+        {
+          name: 'test',
+        },
+      ]);
+
+      expect(wrapper.vm.isSaving).toBe(true);
+
+      return uploadDesign.then(() => {
+        expect(wrapper.vm.isSaving).toBe(false);
+      });
+    });
+
+    it('updates state appropriately after upload complete', () => {
+      createComponent({ stubs: { GlEmptyState } });
+      wrapper.setData({ filesToBeSaved: [{ name: 'test' }] });
+
+      wrapper.vm.onUploadDesignDone();
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.filesToBeSaved).toEqual([]);
+        expect(wrapper.vm.isSaving).toBeFalsy();
+        expect(wrapper.vm.isLatestVersion).toBe(true);
+      });
+    });
+
+    it('updates state appropriately after upload error', () => {
+      createComponent({ stubs: { GlEmptyState } });
+      wrapper.setData({ filesToBeSaved: [{ name: 'test' }] });
+
+      wrapper.vm.onUploadDesignError();
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.vm.filesToBeSaved).toEqual([]);
+        expect(wrapper.vm.isSaving).toBeFalsy();
+        expect(createFlash).toHaveBeenCalled();
+
+        createFlash.mockReset();
+      });
+    });
+
+    it('does not call mutation if createDesign is false', () => {
+      createComponent({ createDesign: false });
+
+      wrapper.vm.onUploadDesign([]);
+
+      expect(mutate).not.toHaveBeenCalled();
+    });
+
+    describe('upload count limit', () => {
+      const MAXIMUM_FILE_UPLOAD_LIMIT = 10;
+
+      afterEach(() => {
+        createFlash.mockReset();
+      });
+
+      it('does not warn when the max files are uploaded', () => {
+        createComponent();
+
+        wrapper.vm.onUploadDesign(new Array(MAXIMUM_FILE_UPLOAD_LIMIT).fill(mockDesigns[0]));
+
+        expect(createFlash).not.toHaveBeenCalled();
+      });
+
+      it('warns when too many files are uploaded', () => {
+        createComponent();
+
+        wrapper.vm.onUploadDesign(new Array(MAXIMUM_FILE_UPLOAD_LIMIT + 1).fill(mockDesigns[0]));
+
+        expect(createFlash).toHaveBeenCalled();
+      });
+    });
+
+    it('flashes warning if designs are skipped', () => {
+      createComponent({
+        mockMutate: () =>
+          Promise.resolve({
+            data: { designManagementUpload: { skippedDesigns: [{ filename: 'test.jpg' }] } },
+          }),
+      });
+
+      const uploadDesign = wrapper.vm.onUploadDesign([
+        {
+          name: 'test',
+        },
+      ]);
+
+      return uploadDesign.then(() => {
+        expect(createFlash).toHaveBeenCalledTimes(1);
+        expect(createFlash).toHaveBeenCalledWith(
+          'Upload skipped. test.jpg did not change.',
+          'warning',
+        );
+      });
+    });
+
+    describe('dragging onto an existing design', () => {
+      beforeEach(() => {
+        createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+      });
+
+      it('calls onUploadDesign with valid upload', () => {
+        wrapper.setMethods({
+          onUploadDesign: jest.fn(),
+        });
+
+        const mockUploadPayload = [
+          {
+            name: mockDesigns[0].filename,
+          },
+        ];
+
+        const designDropzone = findFirstDropzoneWithDesign();
+        designDropzone.vm.$emit('change', mockUploadPayload);
+
+        expect(wrapper.vm.onUploadDesign).toHaveBeenCalledTimes(1);
+        expect(wrapper.vm.onUploadDesign).toHaveBeenCalledWith(mockUploadPayload);
+      });
+
+      it.each`
+        description             | eventPayload                              | message
+        ${'> 1 file'}           | ${[{ name: 'test' }, { name: 'test-2' }]} | ${EXISTING_DESIGN_DROP_MANY_FILES_MESSAGE}
+        ${'different filename'} | ${[{ name: 'wrong-name' }]}               | ${EXISTING_DESIGN_DROP_INVALID_FILENAME_MESSAGE}
+      `('calls createFlash when upload has $description', ({ eventPayload, message }) => {
+        const designDropzone = findFirstDropzoneWithDesign();
+        designDropzone.vm.$emit('change', eventPayload);
+
+        expect(createFlash).toHaveBeenCalledTimes(1);
+        expect(createFlash).toHaveBeenCalledWith(message);
+      });
+    });
+  });
+
+  describe('on latest version when has designs', () => {
+    beforeEach(() => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+    });
+
+    it('renders design checkboxes', () => {
+      expect(findDesignCheckboxes()).toHaveLength(mockDesigns.length);
+    });
+
+    it('renders toolbar buttons', () => {
+      expect(findToolbar().exists()).toBe(true);
+      expect(findToolbar().classes()).toContain('d-flex');
+      expect(findToolbar().classes()).not.toContain('d-none');
+    });
+
+    it('adds two designs to selected designs when their checkboxes are checked', () => {
+      findDesignCheckboxes()
+        .at(0)
+        .trigger('click');
+
+      return wrapper.vm
+        .$nextTick()
+        .then(() => {
+          findDesignCheckboxes()
+            .at(1)
+            .trigger('click');
+
+          return wrapper.vm.$nextTick();
+        })
+        .then(() => {
+          expect(findDeleteButton().exists()).toBe(true);
+          expect(findSelectAllButton().text()).toBe('Deselect all');
+          findDeleteButton().vm.$emit('deleteSelectedDesigns');
+          const [{ variables }] = mutate.mock.calls[0];
+          expect(variables.filenames).toStrictEqual([
+            mockDesigns[0].filename,
+            mockDesigns[1].filename,
+          ]);
+        });
+    });
+
+    it('adds all designs to selected designs when Select All button is clicked', () => {
+      findSelectAllButton().vm.$emit('click');
+
+      return wrapper.vm.$nextTick().then(() => {
+        expect(findDeleteButton().props().hasSelectedDesigns).toBe(true);
+        expect(findSelectAllButton().text()).toBe('Deselect all');
+        expect(wrapper.vm.selectedDesigns).toEqual(mockDesigns.map(design => design.filename));
+      });
+    });
+
+    it('removes all designs from selected designs when at least one design was selected', () => {
+      findDesignCheckboxes()
+        .at(0)
+        .trigger('click');
+
+      return wrapper.vm
+        .$nextTick()
+        .then(() => {
+          findSelectAllButton().vm.$emit('click');
+        })
+        .then(() => {
+          expect(findDeleteButton().props().hasSelectedDesigns).toBe(false);
+          expect(findSelectAllButton().text()).toBe('Select all');
+          expect(wrapper.vm.selectedDesigns).toEqual([]);
+        });
+    });
+  });
+
+  it('on latest version when has no designs does not render toolbar buttons', () => {
+    createComponent({ designs: [], allVersions: [mockVersion] });
+    expect(findToolbar().exists()).toBe(false);
+  });
+
+  describe('on non-latest version', () => {
+    beforeEach(() => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+
+      router.replace({
+        name: DESIGNS_ROUTE_NAME,
+        query: {
+          version: '2',
+        },
+      });
+    });
+
+    it('does not render design checkboxes', () => {
+      expect(findDesignCheckboxes()).toHaveLength(0);
+    });
+
+    it('does not render Delete selected button', () => {
+      expect(findDeleteButton().exists()).toBe(false);
+    });
+
+    it('does not render Select All button', () => {
+      expect(findSelectAllButton().exists()).toBe(false);
+    });
+  });
+
+  describe('pasting a design', () => {
+    let event;
+    beforeEach(() => {
+      createComponent({ designs: mockDesigns, allVersions: [mockVersion] });
+
+      wrapper.setMethods({
+        onUploadDesign: jest.fn(),
+      });
+
+      event = new Event('paste');
+
+      router.replace({
+        name: DESIGNS_ROUTE_NAME,
+        query: {
+          version: '2',
+        },
+      });
+    });
+
+    it('calls onUploadDesign with valid paste', () => {
+      event.clipboardData = {
+        files: [{ name: 'image.png', type: 'image/png' }],
+        getData: () => 'test.png',
+      };
+
+      document.dispatchEvent(event);
+
+      expect(wrapper.vm.onUploadDesign).toHaveBeenCalledTimes(1);
+      expect(wrapper.vm.onUploadDesign).toHaveBeenCalledWith([
+        new File([{ name: 'image.png' }], 'test.png'),
+      ]);
+    });
+
+    it('renames a design if it has an image.png filename', () => {
+      event.clipboardData = {
+        files: [{ name: 'image.png', type: 'image/png' }],
+        getData: () => 'image.png',
+      };
+
+      document.dispatchEvent(event);
+
+      expect(wrapper.vm.onUploadDesign).toHaveBeenCalledTimes(1);
+      expect(wrapper.vm.onUploadDesign).toHaveBeenCalledWith([
+        new File([{ name: 'image.png' }], `design_${Date.now()}.png`),
+      ]);
+    });
+
+    it('does not call onUploadDesign with invalid paste', () => {
+      event.clipboardData = {
+        items: [{ type: 'text/plain' }, { type: 'text' }],
+        files: [],
+      };
+
+      document.dispatchEvent(event);
+
+      expect(wrapper.vm.onUploadDesign).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('when navigating', () => {
+    it('ensures fullscreen layout is not applied', () => {
+      createComponent(true);
+
+      wrapper.vm.$router.push('/designs');
+      expect(mockPageEl.classList.remove).toHaveBeenCalledTimes(1);
+      expect(mockPageEl.classList.remove).toHaveBeenCalledWith(...DESIGN_DETAIL_LAYOUT_CLASSLIST);
+    });
+  });
+});

spec/frontend/design_management_new/router_spec.js

+import { mount, createLocalVue } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import VueRouter from 'vue-router';
+import App from '~/design_management_new/components/app.vue';
+import Designs from '~/design_management_new/pages/index.vue';
+import DesignDetail from '~/design_management_new/pages/design/index.vue';
+import createRouter from '~/design_management_new/router';
+import {
+  ROOT_ROUTE_NAME,
+  DESIGNS_ROUTE_NAME,
+  DESIGN_ROUTE_NAME,
+} from '~/design_management_new/router/constants';
+import '~/commons/bootstrap';
+
+function factory(routeArg) {
+  const localVue = createLocalVue();
+  localVue.use(VueRouter);
+
+  window.gon = { sprite_icons: '' };
+
+  const router = createRouter('/');
+  if (routeArg !== undefined) {
+    router.push(routeArg);
+  }
+
+  return mount(App, {
+    localVue,
+    router,
+    mocks: {
+      $apollo: {
+        queries: {
+          designs: { loading: true },
+          design: { loading: true },
+          permissions: { loading: true },
+        },
+        mutate: jest.fn(),
+      },
+    },
+  });
+}
+
+jest.mock('mousetrap', () => ({
+  bind: jest.fn(),
+  unbind: jest.fn(),
+}));
+
+describe('Design management router', () => {
+  afterEach(() => {
+    window.location.hash = '';
+  });
+
+  describe.each([['/'], [{ name: ROOT_ROUTE_NAME }]])('root route', routeArg => {
+    it('pushes home component', () => {
+      const wrapper = factory(routeArg);
+
+      expect(wrapper.find(Designs).exists()).toBe(true);
+    });
+  });
+
+  describe.each([['/designs'], [{ name: DESIGNS_ROUTE_NAME }]])('designs route', routeArg => {
+    it('pushes designs root component', () => {
+      const wrapper = factory(routeArg);
+
+      expect(wrapper.find(Designs).exists()).toBe(true);
+    });
+  });
+
+  describe.each([['/designs/1'], [{ name: DESIGN_ROUTE_NAME, params: { id: '1' } }]])(
+    'designs detail route',
+    routeArg => {
+      it('pushes designs detail component', () => {
+        const wrapper = factory(routeArg);
+
+        return nextTick().then(() => {
+          const detail = wrapper.find(DesignDetail);
+          expect(detail.exists()).toBe(true);
+          expect(detail.props('id')).toEqual('1');
+        });
+      });
+    },
+  );
+});

spec/frontend/design_management_new/utils/cache_update_spec.js

+import { InMemoryCache } from 'apollo-cache-inmemory';
+import {
+  updateStoreAfterDesignsDelete,
+  updateStoreAfterAddDiscussionComment,
+  updateStoreAfterAddImageDiffNote,
+  updateStoreAfterUploadDesign,
+  updateStoreAfterUpdateImageDiffNote,
+} from '~/design_management_new/utils/cache_update';
+import {
+  designDeletionError,
+  ADD_DISCUSSION_COMMENT_ERROR,
+  ADD_IMAGE_DIFF_NOTE_ERROR,
+  UPDATE_IMAGE_DIFF_NOTE_ERROR,
+} from '~/design_management_new/utils/error_messages';
+import design from '../mock_data/design';
+import createFlash from '~/flash';
+
+jest.mock('~/flash.js');
+
+describe('Design Management cache update', () => {
+  const mockErrors = ['code red!'];
+
+  let mockStore;
+
+  beforeEach(() => {
+    mockStore = new InMemoryCache();
+  });
+
+  describe('error handling', () => {
+    it.each`
+      fnName                                    | subject                                 | errorMessage                               | extraArgs
+      ${'updateStoreAfterDesignsDelete'}        | ${updateStoreAfterDesignsDelete}        | ${designDeletionError({ singular: true })} | ${[[design]]}
+      ${'updateStoreAfterAddDiscussionComment'} | ${updateStoreAfterAddDiscussionComment} | ${ADD_DISCUSSION_COMMENT_ERROR}            | ${[]}
+      ${'updateStoreAfterAddImageDiffNote'}     | ${updateStoreAfterAddImageDiffNote}     | ${ADD_IMAGE_DIFF_NOTE_ERROR}               | ${[]}
+      ${'updateStoreAfterUploadDesign'}         | ${updateStoreAfterUploadDesign}         | ${mockErrors[0]}                           | ${[]}
+      ${'updateStoreAfterUpdateImageDiffNote'}  | ${updateStoreAfterUpdateImageDiffNote}  | ${UPDATE_IMAGE_DIFF_NOTE_ERROR}            | ${[]}
+    `('$fnName handles errors in response', ({ subject, extraArgs, errorMessage }) => {
+      expect(createFlash).not.toHaveBeenCalled();
+      expect(() => subject(mockStore, { errors: mockErrors }, {}, ...extraArgs)).toThrow();
+      expect(createFlash).toHaveBeenCalledTimes(1);
+      expect(createFlash).toHaveBeenCalledWith(errorMessage);
+    });
+  });
+});

spec/frontend/design_management_new/utils/design_management_utils_spec.js

+import {
+  extractCurrentDiscussion,
+  extractDiscussions,
+  findVersionId,
+  designUploadOptimisticResponse,
+  updateImageDiffNoteOptimisticResponse,
+  isValidDesignFile,
+  extractDesign,
+} from '~/design_management_new/utils/design_management_utils';
+import mockResponseNoDesigns from '../mock_data/no_designs';
+import mockResponseWithDesigns from '../mock_data/designs';
+import mockDesign from '../mock_data/design';
+
+jest.mock('lodash/uniqueId', () => () => 1);
+
+describe('extractCurrentDiscussion', () => {
+  let discussions;
+
+  beforeEach(() => {
+    discussions = {
+      nodes: [
+        { id: 101, payload: 'w' },
+        { id: 102, payload: 'x' },
+        { id: 103, payload: 'y' },
+        { id: 104, payload: 'z' },
+      ],
+    };
+  });
+
+  it('finds the relevant discussion if it exists', () => {
+    const id = 103;
+    expect(extractCurrentDiscussion(discussions, id)).toEqual({ id, payload: 'y' });
+  });
+
+  it('returns null if the relevant discussion does not exist', () => {
+    expect(extractCurrentDiscussion(discussions, 0)).not.toBeDefined();
+  });
+});
+
+describe('extractDiscussions', () => {
+  let discussions;
+
+  beforeEach(() => {
+    discussions = {
+      nodes: [
+        { id: 1, notes: { nodes: ['a'] } },
+        { id: 2, notes: { nodes: ['b'] } },
+        { id: 3, notes: { nodes: ['c'] } },
+        { id: 4, notes: { nodes: ['d'] } },
+      ],
+    };
+  });
+
+  it('discards the edges.node artifacts of GraphQL', () => {
+    expect(extractDiscussions(discussions)).toEqual([
+      { id: 1, notes: ['a'], index: 1 },
+      { id: 2, notes: ['b'], index: 2 },
+      { id: 3, notes: ['c'], index: 3 },
+      { id: 4, notes: ['d'], index: 4 },
+    ]);
+  });
+});
+
+describe('version parser', () => {
+  it('correctly extracts version ID from a valid version string', () => {
+    const testVersionId = '123';
+    const testVersionString = `gid://gitlab/DesignManagement::Version/${testVersionId}`;
+
+    expect(findVersionId(testVersionString)).toEqual(testVersionId);
+  });
+
+  it('fails to extract version ID from an invalid version string', () => {
+    const testInvalidVersionString = `gid://gitlab/DesignManagement::Version`;
+
+    expect(findVersionId(testInvalidVersionString)).toBeUndefined();
+  });
+});
+
+describe('optimistic responses', () => {
+  it('correctly generated for designManagementUpload', () => {
+    const expectedResponse = {
+      __typename: 'Mutation',
+      designManagementUpload: {
+        __typename: 'DesignManagementUploadPayload',
+        designs: [
+          {
+            __typename: 'Design',
+            id: -1,
+            image: '',
+            imageV432x230: '',
+            filename: 'test',
+            fullPath: '',
+            notesCount: 0,
+            event: 'NONE',
+            diffRefs: { __typename: 'DiffRefs', baseSha: '', startSha: '', headSha: '' },
+            discussions: { __typename: 'DesignDiscussion', nodes: [] },
+            versions: {
+              __typename: 'DesignVersionConnection',
+              edges: {
+                __typename: 'DesignVersionEdge',
+                node: { __typename: 'DesignVersion', id: -1, sha: -1 },
+              },
+            },
+          },
+        ],
+        errors: [],
+        skippedDesigns: [],
+      },
+    };
+    expect(designUploadOptimisticResponse([{ name: 'test' }])).toEqual(expectedResponse);
+  });
+
+  it('correctly generated for updateImageDiffNoteOptimisticResponse', () => {
+    const mockNote = {
+      id: 'test-note-id',
+    };
+
+    const mockPosition = {
+      x: 10,
+      y: 10,
+      width: 10,
+      height: 10,
+    };
+
+    const expectedResponse = {
+      __typename: 'Mutation',
+      updateImageDiffNote: {
+        __typename: 'UpdateImageDiffNotePayload',
+        note: {
+          ...mockNote,
+          position: mockPosition,
+        },
+        errors: [],
+      },
+    };
+    expect(updateImageDiffNoteOptimisticResponse(mockNote, { position: mockPosition })).toEqual(
+      expectedResponse,
+    );
+  });
+});
+
+describe('isValidDesignFile', () => {
+  // test every filetype that Design Management supports
+  // https://docs.gitlab.com/ee/user/project/issues/design_management.html#limitations
+  it.each`
+    mimetype                      | isValid
+    ${'image/svg'}                | ${true}
+    ${'image/png'}                | ${true}
+    ${'image/jpg'}                | ${true}
+    ${'image/jpeg'}               | ${true}
+    ${'image/gif'}                | ${true}
+    ${'image/bmp'}                | ${true}
+    ${'image/tiff'}               | ${true}
+    ${'image/ico'}                | ${true}
+    ${'image/svg'}                | ${true}
+    ${'video/mpeg'}               | ${false}
+    ${'audio/midi'}               | ${false}
+    ${'application/octet-stream'} | ${false}
+  `('returns $isValid for file type $mimetype', ({ mimetype, isValid }) => {
+    expect(isValidDesignFile({ type: mimetype })).toBe(isValid);
+  });
+});
+
+describe('extractDesign', () => {
+  describe('with no designs', () => {
+    it('returns undefined', () => {
+      expect(extractDesign(mockResponseNoDesigns)).toBeUndefined();
+    });
+  });
+
+  describe('with designs', () => {
+    it('returns the first design available', () => {
+      expect(extractDesign(mockResponseWithDesigns)).toEqual(mockDesign);
+    });
+  });
+});

spec/frontend/design_management_new/utils/error_messages_spec.js

+import {
+  designDeletionError,
+  designUploadSkippedWarning,
+} from '~/design_management_new/utils/error_messages';
+
+const mockFilenames = n =>
+  Array(n)
+    .fill(0)
+    .map((_, i) => ({ filename: `${i + 1}.jpg` }));
+
+describe('Error message', () => {
+  describe('designDeletionError', () => {
+    const singularMsg = 'Could not delete a design. Please try again.';
+    const pluralMsg = 'Could not delete designs. Please try again.';
+
+    describe('when [singular=true]', () => {
+      it.each([[undefined], [true]])('uses singular grammar', singularOption => {
+        expect(designDeletionError({ singular: singularOption })).toEqual(singularMsg);
+      });
+    });
+
+    describe('when [singular=false]', () => {
+      it('uses plural grammar', () => {
+        expect(designDeletionError({ singular: false })).toEqual(pluralMsg);
+      });
+    });
+  });
+
+  describe.each([
+    [[], [], null],
+    [mockFilenames(1), mockFilenames(1), 'Upload skipped. 1.jpg did not change.'],
+    [
+      mockFilenames(2),
+      mockFilenames(2),
+      'Upload skipped. The designs you tried uploading did not change.',
+    ],
+    [
+      mockFilenames(2),
+      mockFilenames(1),
+      'Upload skipped. Some of the designs you tried uploading did not change: 1.jpg.',
+    ],
+    [
+      mockFilenames(6),
+      mockFilenames(5),
+      'Upload skipped. Some of the designs you tried uploading did not change: 1.jpg, 2.jpg, 3.jpg, 4.jpg, 5.jpg.',
+    ],
+    [
+      mockFilenames(7),
+      mockFilenames(6),
+      'Upload skipped. Some of the designs you tried uploading did not change: 1.jpg, 2.jpg, 3.jpg, 4.jpg, 5.jpg, and 1 more.',
+    ],
+    [
+      mockFilenames(8),
+      mockFilenames(7),
+      'Upload skipped. Some of the designs you tried uploading did not change: 1.jpg, 2.jpg, 3.jpg, 4.jpg, 5.jpg, and 2 more.',
+    ],
+  ])('designUploadSkippedWarning', (uploadedFiles, skippedFiles, expected) => {
+    test('returns expected warning message', () => {
+      expect(designUploadSkippedWarning(uploadedFiles, skippedFiles)).toBe(expected);
+    });
+  });
+});

spec/frontend/design_management_new/utils/tracking_spec.js

+import { mockTracking } from 'helpers/tracking_helper';
+import { trackDesignDetailView } from '~/design_management_new/utils/tracking';
+
+function getTrackingSpy(key) {
+  return mockTracking(key, undefined, jest.spyOn);
+}
+
+describe('Tracking Events', () => {
+  describe('trackDesignDetailView', () => {
+    const eventKey = 'projects:issues:design';
+    const eventName = 'design_viewed';
+
+    it('trackDesignDetailView fires a tracking event when called', () => {
+      const trackingSpy = getTrackingSpy(eventKey);
+
+      trackDesignDetailView();
+
+      expect(trackingSpy).toHaveBeenCalledWith(
+        eventKey,
+        eventName,
+        expect.objectContaining({
+          label: eventName,
+          value: {
+            'internal-object-refrerer': '',
+            'design-collection-owner': '',
+            'design-version-number': 1,
+            'design-is-current-version': false,
+          },
+        }),
+      );
+    });
+
+    it('trackDesignDetailView allows to customize the value payload', () => {
+      const trackingSpy = getTrackingSpy(eventKey);
+
+      trackDesignDetailView('from-a-test', 'test', 100, true);
+
+      expect(trackingSpy).toHaveBeenCalledWith(
+        eventKey,
+        eventName,
+        expect.objectContaining({
+          label: eventName,
+          value: {
+            'internal-object-refrerer': 'from-a-test',
+            'design-collection-owner': 'test',
+            'design-version-number': 100,
+            'design-is-current-version': true,
+          },
+        }),
+      );
+    });
+  });
+});