Merge branch '2001-related-issues-fe-base' into 'master'

Related issues FE Base

Closes #2001

See merge request !1797

app/assets/javascripts/issuable/issuable_bundle.js

+import Vue from 'vue';
+import RelatedIssuesRoot from './related_issues/components/related_issues_root.vue';
+
+document.addEventListener('DOMContentLoaded', () => {
+  const relatedIssuesRootElement = document.querySelector('.js-related-issues-root');
+  if (relatedIssuesRootElement) {
+    // eslint-disable-next-line no-new
+    new Vue({
+      el: relatedIssuesRootElement,
+      components: {
+        relatedIssuesRoot: RelatedIssuesRoot,
+      },
+      render: createElement => createElement('related-issues-root', {
+        props: {
+          endpoint: relatedIssuesRootElement.dataset.endpoint,
+          canAddRelatedIssues: gl.utils.convertPermissionToBoolean(
+            relatedIssuesRootElement.dataset.canAddRelatedIssues,
+          ),
+          helpPath: relatedIssuesRootElement.dataset.helpPath,
+        },
+      }),
+    });
+  }
+});

app/assets/javascripts/issuable/related_issues/components/add_issuable_form.vue

+<script>
+import GfmAutoComplete from '~/gfm_auto_complete';
+import eventHub from '../event_hub';
+import IssueToken from './issue_token.vue';
+
+export default {
+  name: 'AddIssuableForm',
+
+  props: {
+    inputValue: {
+      type: String,
+      required: true,
+    },
+    addButtonLabel: {
+      type: String,
+      required: true,
+    },
+    pendingReferences: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    autoCompleteSources: {
+      type: Object,
+      required: false,
+      default: () => ({}),
+    },
+    isSubmitting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+
+  data() {
+    return {
+      isInputFocused: false,
+      isAutoCompleteOpen: false,
+    };
+  },
+
+  components: {
+    issueToken: IssueToken,
+  },
+
+  computed: {
+    isSubmitButtonDisabled() {
+      return this.pendingReferences.length === 0 || this.isSubmitting;
+    },
+  },
+
+  methods: {
+    onInput() {
+      const value = this.$refs.input.value;
+      eventHub.$emit('addIssuableFormInput', value, $(this.$refs.input).caret('pos'));
+    },
+    onFocus() {
+      this.isInputFocused = true;
+    },
+    onBlur() {
+      this.isInputFocused = false;
+
+      // Avoid tokenizing partial input when clicking an autocomplete item
+      if (!this.isAutoCompleteOpen) {
+        const value = this.$refs.input.value;
+        eventHub.$emit('addIssuableFormBlur', value);
+      }
+    },
+    onAutoCompleteToggled(isOpen) {
+      this.isAutoCompleteOpen = isOpen;
+    },
+    onInputWrapperClick() {
+      this.$refs.input.focus();
+    },
+    onFormSubmit() {
+      eventHub.$emit('addIssuableFormSubmit');
+    },
+    onFormCancel() {
+      eventHub.$emit('addIssuableFormCancel');
+    },
+  },
+
+  mounted() {
+    const $input = $(this.$refs.input);
+    new GfmAutoComplete(this.autoCompleteSources).setup($input, {
+      issues: true,
+    });
+    $input.on('shown-issues.atwho', this.onAutoCompleteToggled.bind(this, true));
+    $input.on('hidden-issues.atwho', this.onAutoCompleteToggled.bind(this, false));
+    $input.on('inserted-issues.atwho', this.onInput);
+  },
+
+  beforeDestroy() {
+    const $input = $(this.$refs.input);
+    $input.off('shown-issues.atwho');
+    $input.off('hidden-issues.atwho');
+    $input.off('inserted-issues.atwho', this.onInput);
+  },
+};
+</script>
+
+<template>
+  <div>
+    <div
+      ref="issuableFormWrapper"
+      class="add-issuable-form-input-wrapper form-control"
+      :class="{ focus: isInputFocused }"
+      role="button"
+      @click="onInputWrapperClick">
+      <ul class="add-issuable-form-input-token-list">
+        <li
+          :key="reference"
+          v-for="(reference, index) in pendingReferences"
+          class="js-add-issuable-form-token-list-item add-issuable-form-token-list-item">
+          <issue-token
+            event-namespace="pendingIssuable"
+            :id-key="index"
+            :display-reference="reference"
+            :can-remove="true" />
+        </li>
+        <li class="add-issuable-form-input-list-item">
+          <input
+            ref="input"
+            type="text"
+            class="js-add-issuable-form-input add-issuable-form-input"
+            :value="inputValue"
+            placeholder="Search issues..."
+            @input="onInput"
+            @focus="onFocus"
+            @blur="onBlur" />
+        </li>
+      </ul>
+    </div>
+    <div class="add-issuable-form-actions clearfix">
+      <button
+        ref="addButton"
+        type="button"
+        class="js-add-issuable-form-add-button btn btn-new pull-left"
+        @click="onFormSubmit"
+        :disabled="isSubmitButtonDisabled">
+        {{ addButtonLabel }}
+      </button>
+      <button
+        type="button"
+        class="btn btn-default pull-right"
+        @click="onFormCancel">
+        Cancel
+      </button>
+    </div>
+  </div>
+</template>

app/assets/javascripts/issuable/related_issues/components/issue_token.vue

+<script>
+import eventHub from '../event_hub';
+
+export default {
+  name: 'IssueToken',
+
+  props: {
+    idKey: {
+      type: Number,
+      required: true,
+    },
+    displayReference: {
+      type: String,
+      required: true,
+    },
+    eventNamespace: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    title: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    path: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    state: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    canRemove: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+
+  computed: {
+    removeButtonLabel() {
+      return `Remove related issue ${this.displayReference}`;
+    },
+    hasState() {
+      return this.state && this.state.length > 0;
+    },
+    isOpen() {
+      return this.state === 'opened' || this.state === 'reopened';
+    },
+    isClosed() {
+      return this.state === 'closed';
+    },
+    hasTitle() {
+      return this.title.length > 0;
+    },
+    computedLinkElementType() {
+      return this.path.length > 0 ? 'a' : 'span';
+    },
+    computedPath() {
+      return this.path.length ? this.path : null;
+    },
+  },
+
+  methods: {
+    onRemoveRequest() {
+      let namespacePrefix = '';
+      if (this.eventNamespace && this.eventNamespace.length > 0) {
+        namespacePrefix = `${this.eventNamespace}-`;
+      }
+
+      eventHub.$emit(`${namespacePrefix}removeRequest`, this.idKey);
+    },
+  },
+  updated() {
+    const link = this.$refs.link;
+    const removeButton = this.$refs.removeButton;
+
+    if (link) {
+      $(link).tooltip('fixTitle');
+    }
+
+    if (removeButton) {
+      $(removeButton).tooltip('fixTitle');
+    }
+  },
+};
+</script>
+
+<template>
+  <div class="issue-token">
+    <component
+      :is="this.computedLinkElementType"
+      ref="link"
+      class="issue-token-link"
+      :href="computedPath"
+      :title="title"
+      data-toggle="tooltip"
+      data-placement="top">
+      <span
+        ref="reference"
+        class="issue-token-reference">
+        <i
+          ref="stateIcon"
+          v-if="hasState"
+          class="fa"
+          :class="{
+            'issue-token-state-icon-open fa-circle-o': isOpen,
+            'issue-token-state-icon-closed fa-minus': isClosed,
+          }"
+          :aria-label="state">
+        </i>
+        {{ displayReference }}
+      </span>
+      <span
+        v-if="hasTitle"
+        ref="title"
+        class="js-issue-token-title issue-token-title"
+        :class="{ 'issue-token-title-standalone': !canRemove }">
+        <span class="issue-token-title-text">
+          {{ title }}
+        </span>
+      </span>
+    </component>
+    <button
+      ref="removeButton"
+      v-if="canRemove"
+      type="button"
+      class="js-issue-token-remove-button issue-token-remove-button"
+      :title="removeButtonLabel"
+      data-toggle="tooltip"
+      @click="onRemoveRequest">
+      <i
+        class="fa fa-times"
+        aria-hidden="true">
+      </i>
+    </button>
+  </div>
+</template>

app/assets/javascripts/issuable/related_issues/components/related_issues_block.vue

+<script>
+import eventHub from '../event_hub';
+import loadingIcon from '../../../vue_shared/components/loading_icon.vue';
+import issueToken from './issue_token.vue';
+import addIssuableForm from './add_issuable_form.vue';
+
+export default {
+  name: 'RelatedIssuesBlock',
+
+  props: {
+    isFetching: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    isSubmitting: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    relatedIssues: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    canAddRelatedIssues: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    isFormVisible: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    pendingReferences: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    inputValue: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    helpPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    autoCompleteSources: {
+      type: Object,
+      required: false,
+      default: () => ({}),
+    },
+  },
+
+  components: {
+    loadingIcon,
+    addIssuableForm,
+    issueToken,
+  },
+
+  computed: {
+    hasRelatedIssues() {
+      return this.relatedIssues.length > 0;
+    },
+    relatedIssueCount() {
+      return this.relatedIssues.length;
+    },
+    hasHelpPath() {
+      return this.helpPath.length > 0;
+    },
+  },
+
+  methods: {
+    toggleAddRelatedIssuesForm() {
+      eventHub.$emit('toggleAddRelatedIssuesForm');
+    },
+  },
+
+  updated() {
+    const addIssueButton = this.$refs.issueCountBadgeAddButton;
+    if (addIssueButton) {
+      $(addIssueButton).tooltip('fixTitle');
+    }
+  },
+};
+</script>
+
+<template>
+  <div class="related-issues-block">
+    <div
+      class="panel-slim panel-default">
+      <div
+        class="panel-heading"
+        :class="{ 'panel-empty-heading': !this.hasRelatedIssues }">
+        <h3 class="panel-title related-issues-panel-title">
+          <div>
+            Related issues
+            <a
+              v-if="hasHelpPath"
+              :href="helpPath">
+              <i
+                class="related-issues-header-help-icon fa fa-question-circle"
+                aria-label="Read more about related issues">
+              </i>
+            </a>
+            <div class="js-related-issues-header-issue-count related-issues-header-issue-count issue-count-badge">
+              <span
+                class="issue-count-badge-count"
+                :class="{ 'has-btn': this.canAddRelatedIssues }">
+                {{ relatedIssueCount }}
+              </span>
+              <button
+                ref="issueCountBadgeAddButton"
+                v-if="canAddRelatedIssues"
+                type="button"
+                class="js-issue-count-badge-add-button issue-count-badge-add-button btn btn-small btn-default"
+                title="Add an issue"
+                aria-label="Add an issue"
+                data-toggle="tooltip"
+                data-placement="top"
+                @click="toggleAddRelatedIssuesForm">
+                <i
+                  class="fa fa-plus"
+                  aria-hidden="true">
+                </i>
+              </button>
+            </div>
+          </div>
+          <div>
+            <loadingIcon
+              ref="loadingIcon"
+              v-if="isFetching"
+              label="Fetching related issues" />
+          </div>
+        </h3>
+      </div>
+      <div
+        v-if="isFormVisible"
+        class="js-add-related-issues-form-area panel-body"
+        :class="{
+          'related-issues-add-related-issues-form-with-break': hasRelatedIssues
+        }">
+        <add-issuable-form
+          :is-submitting="isSubmitting"
+          :input-value="inputValue"
+          :pending-references="pendingReferences"
+          add-button-label="Add related issues"
+          :auto-complete-sources="autoCompleteSources" />
+      </div>
+      <div
+        v-if="hasRelatedIssues"
+        class="related-issues-token-body panel-body">
+        <ul
+          class="related-issues-token-list">
+          <li
+            :key="issue.id"
+            v-for="issue in relatedIssues"
+            class="js-related-issues-token-list-item related-issues-token-list-item">
+            <issue-token
+              event-namespace="relatedIssue"
+              :id-key="issue.id"
+              :display-reference="issue.reference"
+              :title="issue.title"
+              :path="issue.path"
+              :state="issue.state"
+              :can-remove="true" />
+          </li>
+        </ul>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>

app/assets/javascripts/issuable/related_issues/components/related_issues_root.vue

+<script>
+/* global Flash */
+
+/*
+`rawReferences` are separated by spaces.
+Given `abc 123 zxc`, `rawReferences = ['abc', '123', 'zxc']`
+
+Consider you are typing `abc 123 zxc` in the input and your caret position is
+at position 4 right before the `123` `rawReference`. Then you type `#` and
+it becomes a valid reference, `#123`, but we don't want to jump it straight into
+`pendingReferences` because you could still want to type. Say you typed `999`
+and now we have `#999123`. Only when you move your caret away from that `rawReference`
+do we actually put it in the `pendingReferences`.
+
+Your caret can stop touching a `rawReference` can happen in a variety of ways:
+
+ - As you type, we only tokenize after you type a space or move with the arrow keys
+ - On blur, we consider your caret not touching anything
+
+---
+
+ - When you click the "Add related issues"(in the `AddIssuableForm`),
+   we submit the `pendingReferences` to the server and they come back as actual `relatedIssues`
+ - When you click the "Cancel"(in the `AddIssuableForm`), we clear out `pendingReferences`
+   and hide the `AddIssuableForm` area.
+
+*/
+
+import eventHub from '../event_hub';
+import RelatedIssuesBlock from './related_issues_block.vue';
+import RelatedIssuesStore from '../stores/related_issues_store';
+import RelatedIssuesService from '../services/related_issues_service';
+
+const SPACE_FACTOR = 1;
+
+export default {
+  name: 'RelatedIssuesRoot',
+
+  props: {
+    endpoint: {
+      type: String,
+      required: true,
+    },
+    canAddRelatedIssues: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    helpPath: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+
+  data() {
+    this.store = new RelatedIssuesStore();
+
+    return {
+      state: this.store.state,
+      isFetching: false,
+      isSubmitting: false,
+      isFormVisible: false,
+      inputValue: '',
+    };
+  },
+
+  components: {
+    relatedIssuesBlock: RelatedIssuesBlock,
+  },
+
+  computed: {
+    autoCompleteSources() {
+      return gl.GfmAutoComplete && gl.GfmAutoComplete.dataSources;
+    },
+  },
+
+  methods: {
+    onRelatedIssueRemoveRequest(idToRemove) {
+      const issueToRemove = _.find(this.state.relatedIssues, issue => issue.id === idToRemove);
+
+      if (issueToRemove) {
+        this.service.removeRelatedIssue(issueToRemove.destroy_relation_path)
+          .then(res => res.json())
+          .then((data) => {
+            this.store.setRelatedIssues(data.issues);
+          })
+          .catch((res) => {
+            if (res && res.status !== 404) {
+              // eslint-disable-next-line no-new
+              new Flash('An error occurred while removing related issues.');
+            }
+          });
+      } else {
+        // eslint-disable-next-line no-new
+        new Flash('We could not determine the path to remove the related issue');
+      }
+    },
+    onToggleAddRelatedIssuesForm() {
+      this.isFormVisible = !this.isFormVisible;
+    },
+    onPendingIssueRemoveRequest(indexToRemove) {
+      this.store.removePendingRelatedIssue(indexToRemove);
+    },
+    onPendingFormSubmit() {
+      if (this.state.pendingReferences.length > 0) {
+        this.isSubmitting = true;
+        this.service.addRelatedIssues(this.state.pendingReferences)
+          .then(res => res.json())
+          .then((data) => {
+            // We could potentially lose some pending issues in the interim here
+            this.store.setPendingReferences([]);
+            this.store.setRelatedIssues(data.issues);
+
+            this.isSubmitting = false;
+            // Close the form on submission
+            this.isFormVisible = false;
+          })
+          .catch((res) => {
+            this.isSubmitting = false;
+            // eslint-disable-next-line no-new
+            new Flash(res.data.message || 'An error occurred while submitting related issues.');
+          });
+      }
+    },
+    onPendingFormCancel() {
+      this.isFormVisible = false;
+      this.store.setPendingReferences([]);
+      this.inputValue = '';
+    },
+    fetchRelatedIssues() {
+      this.isFetching = true;
+      this.service.fetchRelatedIssues()
+        .then(res => res.json())
+        .then((issues) => {
+          this.store.setRelatedIssues(issues);
+          this.isFetching = false;
+        })
+        .catch(() => new Flash('An error occurred while fetching related issues.'));
+    },
+
+    onInput(newValue, caretPos) {
+      const rawReferences = newValue
+        .split(/\s/);
+
+      let touchedReference;
+      let iteratingPos = 0;
+      const untouchedRawReferences = rawReferences
+        .filter((reference) => {
+          let isTouched = false;
+          if (caretPos >= iteratingPos && caretPos <= (iteratingPos + reference.length)) {
+            touchedReference = reference;
+            isTouched = true;
+          }
+
+          // `+ SPACE_FACTOR` to factor in the missing space we split at earlier
+          iteratingPos = iteratingPos + reference.length + SPACE_FACTOR;
+          return !isTouched;
+        })
+        .filter(reference => reference.trim().length > 0);
+
+      this.store.setPendingReferences(
+        this.state.pendingReferences.concat(untouchedRawReferences),
+      );
+      this.inputValue = `${touchedReference}`;
+    },
+    onBlur(newValue) {
+      const rawReferences = newValue
+        .split(/\s+/)
+        .filter(reference => reference.trim().length > 0);
+
+      this.store.setPendingReferences(
+        this.state.pendingReferences.concat(rawReferences),
+      );
+      this.inputValue = '';
+    },
+  },
+
+  created() {
+    eventHub.$on('relatedIssue-removeRequest', this.onRelatedIssueRemoveRequest);
+    eventHub.$on('toggleAddRelatedIssuesForm', this.onToggleAddRelatedIssuesForm);
+    eventHub.$on('pendingIssuable-removeRequest', this.onPendingIssueRemoveRequest);
+    eventHub.$on('addIssuableFormSubmit', this.onPendingFormSubmit);
+    eventHub.$on('addIssuableFormCancel', this.onPendingFormCancel);
+    eventHub.$on('addIssuableFormInput', this.onInput);
+    eventHub.$on('addIssuableFormBlur', this.onBlur);
+
+    this.service = new RelatedIssuesService(this.endpoint);
+    this.fetchRelatedIssues();
+  },
+
+  beforeDestroy() {
+    eventHub.$off('relatedIssue-removeRequest', this.onRelatedIssueRemoveRequest);
+    eventHub.$off('toggleAddRelatedIssuesForm', this.onToggleAddRelatedIssuesForm);
+    eventHub.$off('pendingIssuable-removeRequest', this.onPendingIssueRemoveRequest);
+    eventHub.$off('addIssuableFormSubmit', this.onPendingFormSubmit);
+    eventHub.$off('addIssuableFormCancel', this.onPendingFormCancel);
+    eventHub.$off('addIssuableFormInput', this.onInput);
+    eventHub.$off('addIssuableFormBlur', this.onBlur);
+  },
+};
+</script>
+
+<template>
+  <related-issues-block
+    :help-path="helpPath"
+    :is-fetching="isFetching"
+    :is-submitting="isSubmitting"
+    :related-issues="state.relatedIssues"
+    :can-add-related-issues="canAddRelatedIssues"
+    :pending-references="state.pendingReferences"
+    :is-form-visible="isFormVisible"
+    :input-value="inputValue"
+    :auto-complete-sources="autoCompleteSources" />
+</template>

app/assets/javascripts/issuable/related_issues/event_hub.js

+import Vue from 'vue';
+
+export default new Vue();

app/assets/javascripts/issuable/related_issues/services/related_issues_service.js

+import Vue from 'vue';
+import vueResource from 'vue-resource';
+
+Vue.use(vueResource);
+
+class RelatedIssuesService {
+  constructor(endpoint) {
+    this.relatedIssuesResource = Vue.resource(endpoint);
+  }
+
+  fetchRelatedIssues() {
+    return this.relatedIssuesResource.get();
+  }
+
+  addRelatedIssues(newIssueReferences) {
+    return this.relatedIssuesResource.save({}, {
+      issue_references: newIssueReferences,
+    });
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  removeRelatedIssue(endpoint) {
+    return Vue.http.delete(endpoint);
+  }
+}
+
+export default RelatedIssuesService;

app/assets/javascripts/issuable/related_issues/stores/related_issues_store.js

+class RelatedIssuesStore {
+  constructor() {
+    this.state = {
+      // Stores issue objects of the known related issues
+      relatedIssues: [],
+      // Stores references of the "staging area" related issues that are planned to be added
+      pendingReferences: [],
+    };
+  }
+
+  setRelatedIssues(issues) {
+    this.state.relatedIssues = issues;
+  }
+
+  removeRelatedIssue(idToRemove) {
+    this.state.relatedIssues = this.state.relatedIssues.filter(issue => issue.id !== idToRemove);
+  }
+
+  setPendingReferences(issues) {
+    this.state.pendingReferences = issues;
+  }
+
+  removePendingRelatedIssue(indexToRemove) {
+    this.state.pendingReferences =
+      this.state.pendingReferences.filter((reference, index) => index !== indexToRemove);
+  }
+
+}
+
+export default RelatedIssuesStore;

app/assets/stylesheets/framework/panels.scss

-@mixin panel {
-  .panel-heading {
-    padding: $gl-vert-padding $gl-padding;
-    line-height: 36px;
-
-    .controls {
-      margin-top: -2px;
-      float: right;
-    }
-
-    .dropdown-menu-toggle {
-      line-height: 20px;
-    }
-
-    .badge {
-      margin-top: -2px;
-      margin-left: 5px;
-    }
-
-    &.split {
-      display: flex;
-      align-items: center;
-    }
-
-    .left {
-      flex: 1 1 auto;
-    }
-
-    .right {
-      flex: 0 0 auto;
-      text-align: right;
-    }
+.panel {
+  margin-bottom: $gl-padding;
+}
+
+.panel-slim {
+  @extend .panel;
+  margin-bottom: $gl-vert-padding;
+}
+
+
+.panel-heading {
+  padding: $gl-vert-padding $gl-padding;
+  line-height: 36px;
+
+  .controls {
+    margin-top: -2px;
+    float: right;
   }
 
-  .panel-body {
-    padding: $gl-padding;
+  .dropdown-menu-toggle {
+    line-height: 20px;
+  }
 
-    .form-actions {
-      margin: -$gl-padding;
-      margin-top: $gl-padding;
-    }
+  .badge {
+    margin-top: -2px;
+    margin-left: 5px;
   }
 
-  .panel-title {
-    font-size: inherit;
-    line-height: inherit;
+  &.split {
+    display: flex;
+    align-items: center;
+  }
+
+  .left {
+    flex: 1 1 auto;
+  }
+
+  .right {
+    flex: 0 0 auto;
+    text-align: right;
   }
 }
 
-.panel {
-  @include panel;
-  margin-bottom: $gl-padding;
+.panel-empty-heading {
+  border-bottom: 0;
 }
 
-.panel-slim {
-  @extend .panel;
-  @include panel;
-  margin-bottom: $gl-vert-padding;
+.panel-body {
+  padding: $gl-padding;
+
+  .form-actions {
+    margin: -$gl-padding;
+    margin-top: $gl-padding;
+  }
+}
+
+.panel-title {
+  font-size: inherit;
+  line-height: inherit;
 }

app/assets/stylesheets/framework/variables.scss

@@ -597,4 +597,3 @@ Convdev Index
 $color-high-score: $green-400;
 $color-average-score: $orange-400;
 $color-low-score: $red-400;
-

app/assets/stylesheets/pages/boards.scss

+@import "./issues/issue_count_badge";
+
 [v-cloak] {
   display: none;
 }
@@ -415,30 +417,6 @@
   margin: 5px;
 }
 
-.board-issue-count-holder {
-  margin-top: -3px;
-
-  .btn {
-    line-height: 12px;
-    border-top-left-radius: 0;
-    border-bottom-left-radius: 0;
-  }
-}
-
-.board-issue-count {
-  padding-right: 10px;
-  padding-left: 10px;
-  line-height: 21px;
-  border-radius: $border-radius-base;
-  border: 1px solid $border-color;
-
-  &.has-btn {
-    border-top-right-radius: 0;
-    border-bottom-right-radius: 0;
-    border-width: 1px 0 1px 1px;
-  }
-}
-
 .boards-title-holder {
   padding: 25px 13px $gl-padding;
 

app/assets/stylesheets/pages/issuable.scss

@@ -727,3 +727,48 @@
     }
   }
 }
+
+.add-issuable-form-input-wrapper {
+  height: auto;
+  padding: $gl-vert-padding $gl-vert-padding 0 $gl-input-padding;
+
+  &.focus,
+  &.focus:hover {
+    border-color: $dropdown-input-focus-border;
+    box-shadow: 0 0 4px $search-input-focus-shadow-color;
+  }
+}
+
+.add-issuable-form-input-token-list {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: baseline;
+  list-style: none;
+  margin-bottom: 0;
+  padding-left: 0;
+}
+
+.add-issuable-form-token-list-item {
+  max-width: 100%;
+  margin-bottom: $gl-vert-padding;
+  margin-right: 5px;
+}
+
+.add-issuable-form-input-list-item {
+  flex: 1;
+  min-width: 200px;
+  margin-bottom: $gl-vert-padding;
+}
+
+.add-issuable-form-input {
+  width: 100%;
+  border: 0;
+
+  &:focus {
+    outline: none;
+  }
+}
+
+.add-issuable-form-actions {
+  margin-top: $gl-padding;
+}

app/assets/stylesheets/pages/issues.scss

+@import "./issues/issue_count_badge";
+@import "./issues/related_issues";
+
 .issues-list {
   .issue {
     padding: 10px 0 10px $gl-padding;
@@ -275,3 +278,118 @@ ul.related-merge-requests > li {
     }
   }
 }
+
+
+.issue-token {
+  display: inline-flex;
+  align-items: stretch;
+  max-width: 100%;
+  line-height: 1.75;
+  white-space: nowrap;
+}
+
+.issue-token-link {
+  display: inline-flex;
+  min-width: 0;
+
+  color: $gl-text-color-secondary;
+
+  &[href] {
+    color: $gl-link-color;
+  }
+
+  &:hover,
+  &:focus {
+    outline: none;
+    text-decoration: none;
+  }
+}
+
+.issue-token-reference {
+  display: flex;
+  align-items: center;
+  margin-right: 1px;
+  padding-left: 0.5em;
+  padding-right: 0.5em;
+  background-color: $gray-lighter;
+  border-top-left-radius: 2px;
+  border-bottom-left-radius: 2px;
+  transition: background $general-hover-transition-duration $general-hover-transition-curve, color $general-hover-transition-duration $general-hover-transition-curve;
+
+  .issue-token:hover &,
+  .issue-token-link:focus > & {
+    background-color: $gray-normal;
+    color: $gl-link-hover-color;
+    text-decoration: none;
+  }
+}
+
+@mixin issue-token-state-icon {
+  margin-right: 0.35em;
+  font-size: 0.9em;
+}
+
+.issue-token-state-icon-open {
+  @include issue-token-state-icon;
+  color: $green-600;
+}
+
+.issue-token-state-icon-closed {
+  @include issue-token-state-icon;
+  color: $red-600;
+}
+
+.issue-token-title {
+  overflow: hidden;
+  display: flex;
+  align-items: baseline;
+  padding-left: 0.5em;
+  background-color: $gray-normal;
+  color: $gl-text-color-secondary;
+  transition: background $general-hover-transition-duration $general-hover-transition-curve;
+
+  .issue-token:hover &,
+  .issue-token-link:focus > & {
+    background-color: $border-gray-normal;
+  }
+
+  & > .fa {
+    line-height: inherit;
+  }
+}
+
+.issue-token-title-standalone {
+  padding-right: 0.5em;
+  border-top-right-radius: 2px;
+  border-bottom-right-radius: 2px;
+}
+
+.issue-token-title-text {
+  overflow: hidden;
+  max-width: 264px;
+  text-overflow: ellipsis;
+}
+
+.issue-token-remove-button {
+  display: flex;
+  align-items: center;
+  padding: 0 0.5em;
+  background-color: $gray-normal;
+  border: 0;
+  border-top-right-radius: 2px;
+  border-bottom-right-radius: 2px;
+  color: $gl-text-color-secondary;
+  transition: background $general-hover-transition-duration $general-hover-transition-curve;
+
+  &:hover,
+  &:focus,
+  .issue-token:hover &,
+  .issue-token-link:focus + & {
+    background-color: $border-gray-normal;
+    outline: none;
+  }
+
+  & > .fa {
+    font-size: 0.9em;
+  }
+}

app/assets/stylesheets/pages/issues/issue_count_badge.scss

+.issue-count-badge {
+  display: inline-flex;
+  align-items: stretch;
+  height: 24px;
+}
+
+.issue-count-badge-count {
+  display: flex;
+  align-items: center;
+  padding-right: 10px;
+  padding-left: 10px;
+  border: 1px solid $border-color;
+  border-radius: $border-radius-base;
+  line-height: 1;
+
+  &.has-btn {
+    border-right: 0;
+    border-top-right-radius: 0;
+    border-bottom-right-radius: 0;
+  }
+}
+
+.issue-count-badge-add-button {
+  display: flex;
+  align-items: center;
+  border: 1px solid $border-color;
+  border-radius: 0 $border-radius-base $border-radius-base 0;
+  line-height: 1;
+}

app/assets/stylesheets/pages/issues/related_issues.scss

+$token_spacing_bottom: 0.5em;
+
+.related-issues-block {
+  margin-top: 3 * $gl-vert-padding;
+}
+
+.related-issues-panel-title {
+  display: flex;
+  justify-content: space-between;
+}
+
+.related-issues-header-help-icon {
+  margin-left: 0.25em;
+  color: $gl-text-color-secondary;
+}
+
+.related-issues-header-issue-count {
+  margin-left: 0.5em;
+}
+
+.related-issues-add-related-issues-form-with-break {
+  border-bottom: 1px solid $border-color;
+}
+
+.related-issues-token-body {
+  padding-bottom: calc(#{$gl-padding} - #{$token_spacing_bottom});
+}
+
+.related-issues-token-list {
+  display: flex;
+  flex-wrap: wrap;
+  margin-bottom: 0;
+  padding-left: 0;
+  list-style: none;
+}
+
+.related-issues-token-list-item {
+  max-width: 100%;
+  margin-bottom: $token_spacing_bottom;
+  margin-right: 5px;
+}

app/helpers/system_note_helper.rb

@@ -20,7 +20,9 @@ module SystemNoteHelper
     'moved' => 'icon_arrow_circle_o_right',
     'outdated' => 'icon_edit',
     'approved' => 'icon_check',
-    'unapproved' => 'icon_fa_close'
+    'unapproved' => 'icon_fa_close',
+    'relate' => 'icon_anchor',
+    'unrelate' => 'icon_anchor_broken'
   }.freeze
 
   def icon_for_system_note(note)

app/views/projects/boards/components/_board.html.haml

@@ -6,11 +6,11 @@
         %span.has-tooltip{ ":title" => '(list.label ? list.label.description : "")',
           data: { container: "body", placement: "bottom" } }
           {{ list.title }}
-        .board-issue-count-holder.pull-right.clearfix{ "v-if" => 'list.type !== "blank"' }
-          %span.board-issue-count.pull-left{ ":class" => '{ "has-btn": list.type !== "closed" && !disabled }' }
+        .issue-count-badge.pull-right.clearfix{ "v-if" => 'list.type !== "blank"' }
+          %span.issue-count-badge-count{ ":class" => '{ "has-btn": list.type !== "closed" && !disabled }' }
             {{ list.issuesSize }}
           - if can?(current_user, :admin_issue, @project)
-            %button.btn.btn-small.btn-default.pull-right.has-tooltip{ type: "button",
+            %button.issue-count-badge-add-button.btn.btn-small.btn-default.has-tooltip{ type: "button",
               "@click" => "showNewIssueForm",
               "v-if" => 'list.type !== "closed"',
               "aria-label" => "New issue",

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

@@ -4,6 +4,9 @@
 - page_card_attributes @issue.card_attributes
 - can_update_issue = can?(current_user, :update_issue, @issue)
 - can_report_spam = @issue.submittable_as_spam_by?(current_user)
+- content_for :page_specific_javascripts do
+  = webpack_bundle_tag('common_vue')
+  = webpack_bundle_tag('issuable')
 
 .clearfix.detail-page-header
   .issuable-header
@@ -65,6 +68,11 @@
 
       = edited_time_ago_with_tooltip(@issue, placement: 'bottom', html_class: 'issue-edited-ago js-issue-edited-ago')
 
+    - if can?(current_user, :read_issue_link, @project)
+      .js-related-issues-root{ data: { endpoint: namespace_project_issue_links_path(@project.namespace, @project, @issue),
+        can_add_related_issues: "#{can?(current_user, :update_issue, @issue)}",
+        help_path: help_page_path('user/project/issues/related_issues') } }
+
     #merge-requests{ data: { url: referenced_merge_requests_namespace_project_issue_url(@project.namespace, @project, @issue) } }
       // This element is filled in using JavaScript.
 

app/views/projects/merge_requests/_show.html.haml

@@ -5,6 +5,7 @@
 - content_for :page_specific_javascripts do
   = page_specific_javascript_bundle_tag('common_vue')
   = page_specific_javascript_bundle_tag('diff_notes')
+  = webpack_bundle_tag('issuable')
 
 .merge-request{ 'data-url' => merge_request_path(@merge_request, format: :json), 'data-project-path' => project_path(@merge_request.project) }
   = render "projects/merge_requests/show/mr_title"

app/views/shared/icons/_icon_anchor.svg

+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill-rule="evenodd" d="m8.419 7.99l-.002.002c-.023-.026-.046-.051-.071-.075-.642-.642-1.678-.651-2.312-.018l-2.432 2.432c-.635.635-.626 1.668.018 2.312.642.642 1.678.651 2.312.018l1.028-1.028c.719.366 1.481.518 2.176.444l-1.753 1.753c-1.344 1.344-3.542 1.326-4.909-.041-1.367-1.367-1.383-3.566-.041-4.909l2.292-2.292c1.344-1.344 3.542-1.326 4.909.041.016.016.032.032.048.049.009.008.017.016.025.024.362.362.367.944.011 1.3-.356.356-.938.351-1.3-.011m-.575.284l.002-.002c.023.026.046.051.071.075.642.642 1.678.651 2.312.018l2.432-2.432c.635-.635.626-1.668-.018-2.312-.642-.642-1.678-.651-2.312-.018l-1.028 1.028c-.719-.366-1.481-.518-2.176-.444l1.753-1.753c1.344-1.344 3.542-1.326 4.909.041 1.367 1.367 1.383 3.566.041 4.909l-2.292 2.292c-1.344 1.344-3.542 1.326-4.909-.041-.016-.016-.032-.032-.048-.049-.009-.008-.017-.016-.025-.024-.362-.362-.367-.944-.011-1.3.356-.356.938-.351 1.3.011"/></svg>

app/views/shared/icons/_icon_anchor_broken.svg

+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><g fill-rule="evenodd"><path fill-rule="nonzero" d="M11.3 8.85c.2-.15.4-.3.6-.5l1.4-1.4c1.37-1.38 1.53-3.44.36-4.6-1.17-1.18-3.23-1.02-4.6.35l-1.4 1.4c-.2.2-.36.4-.5.6l1.66.66.04-.04 1.4-1.4c.6-.6 1.48-.66 1.98-.16s.44 1.38-.15 1.97l-1.44 1.4-.04.05.66 1.67zM8.85 11.3c-.15.2-.3.4-.5.6l-1.4 1.4c-1.38 1.37-3.44 1.53-4.6.36-1.18-1.17-1.02-3.23.35-4.6l1.4-1.4c.2-.2.4-.36.6-.5l.66 1.66-.04.04-1.4 1.4c-.6.6-.66 1.48-.16 1.98s1.38.44 1.97-.15l1.4-1.44.05-.04 1.67.66z"/><path d="M12.66 9.2h2c.27 0 .5.23.5.5v.06c0 .27-.23.5-.5.5h-2c-.28 0-.5-.23-.5-.5V9.7c0-.27.22-.5.5-.5zm-.4 2.12l1.43 1.42c.16.2.16.5 0 .7l-.07.04c-.2.2-.5.2-.7 0l-1.42-1.4c-.2-.2-.2-.53 0-.72l.05-.04c.2-.2.5-.2.7 0zm-2.8 1.1c0-.28.2-.5.5-.5H10c.28 0 .5.22.5.5v2c0 .27-.22.5-.5.5h-.05c-.28 0-.5-.23-.5-.5v-2zM6.7 3.24v-2c0-.27-.22-.5-.5-.5h-.05c-.27 0-.5.23-.5.5v2c0 .28.23.5.5.5h.05c.28 0 .5-.22.5-.5zm-2.1.4L3.16 2.2c-.2-.2-.5-.2-.7 0l-.04.04c-.2.2-.2.5 0 .7l1.4 1.42c.2.2.52.2.72 0l.04-.04c.18-.2.18-.5 0-.7zm-1.1 2.8c.27 0 .5-.2.5-.5V5.9c0-.27-.23-.5-.5-.5h-2c-.28 0-.5.23-.5.5v.06c0 .28.22.5.5.5h2z"/></g></svg>

config/webpack.config.js

@@ -42,6 +42,7 @@ var config = {
     graphs:               './graphs/graphs_bundle.js',
     group:                './group.js',
     groups_list:          './groups_list.js',
+    issuable:             './issuable/issuable_bundle.js',
     issues:               './issues/issues_bundle.js',
     issue_show:           './issue_show/index.js',
     integrations:         './integrations',
@@ -159,6 +160,7 @@ var config = {
         'environments',
         'environments_folder',
         'filtered_search',
+        'issuable',
         'issue_show',
         'merge_conflicts',
         'notebook_viewer',

doc/README.md

@@ -85,6 +85,7 @@ Manage files and branches from the UI (user interface):
   - [Cherry-pick](user/project/merge_requests/cherry_pick_changes.md)
 - [Milestones](user/project/milestones/index.md): Organize issues and merge requests into a cohesive group, optionally setting a due date.
   - **(EES/EEP)** [Burndown Charts](user/project/milestones/index.md#burndown-charts): Watch your project's progress throughout a specific milestone.
+- [Related issues](user/project/issues/related_issues.md)
 - [Todos](workflow/todos.md): A chronological list of to-dos that are waiting for your input, all in a simple dashboard.
 
 ### Git and GitLab

doc/user/project/issues/related_issues.md

+# Related issues
+
+> [Introduced][ee-1797] in [GitLab Enterprise Edition Starter][ee] 9.4.
+
+Related issues are a bi-directional relationship between any two issues
+and appear in a block below the issue description. Issues can be across groups
+and projects.
+
+The relationship only shows up in the UI if the user has write [permissions]
+to see both issues (`> Guest`).
+
+## Adding a related issue
+
+You can relate one issue to the other by clicking the issue count badge "+" button
+in the header of the related issue block. Then use the input that will appear
+where you can type in the issue reference or paste in a link to an issue.
+
+Valid references will be added to a temporary list that you can review.
+When ready, click the green "Add related issues" button to submit.
+
+![Adding a related issue](img/related_issues_add.png)
+
+## Removing a related issue
+
+In the related issues block, click the "x" icon on the right-side of every issue
+token. Because of the bi-directional relationship, it will no longer appear in
+either issue.
+
+![Removing a related issue](img/related_issues_remove.png)
+
+[ee]: https://about.gitlab.com/gitlab-ee/
+[ee-1797]: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1797
+[permissions]: ../../permissions.md

spec/features/boards/new_issue_spec.rb

@@ -19,18 +19,18 @@ describe 'Issue Boards new issue', feature: true, js: true do
     end
 
     it 'displays new issue button' do
-      expect(page).to have_selector('.board-issue-count-holder .btn', count: 1)
+      expect(page).to have_selector('.issue-count-badge-add-button', count: 1)
     end
 
     it 'does not display new issue button in closed list' do
       page.within('.board:nth-child(2)') do
-        expect(page).not_to have_selector('.board-issue-count-holder .btn')
+        expect(page).not_to have_selector('.issue-count-badge-add-button')
       end
     end
 
     it 'shows form when clicking button' do
       page.within(first('.board')) do
-        find('.board-issue-count-holder .btn').click
+        find('.issue-count-badge-add-button').click
 
         expect(page).to have_selector('.board-new-issue-form')
       end
@@ -38,7 +38,7 @@ describe 'Issue Boards new issue', feature: true, js: true do
 
     it 'hides form when clicking cancel' do
       page.within(first('.board')) do
-        find('.board-issue-count-holder .btn').click
+        find('.issue-count-badge-add-button').click
 
         expect(page).to have_selector('.board-new-issue-form')
 
@@ -50,7 +50,7 @@ describe 'Issue Boards new issue', feature: true, js: true do
 
     it 'creates new issue' do
       page.within(first('.board')) do
-        find('.board-issue-count-holder .btn').click
+        find('.issue-count-badge-add-button').click
       end
 
       page.within(first('.board-new-issue-form')) do
@@ -60,14 +60,14 @@ describe 'Issue Boards new issue', feature: true, js: true do
 
       wait_for_requests
 
-      page.within(first('.board .board-issue-count')) do
+      page.within(first('.board .issue-count-badge-count')) do
         expect(page).to have_content('1')
       end
     end
 
     it 'shows sidebar when creating new issue' do
       page.within(first('.board')) do
-        find('.board-issue-count-holder .btn').click
+        find('.issue-count-badge-add-button').click
       end
 
       page.within(first('.board-new-issue-form')) do
@@ -88,7 +88,7 @@ describe 'Issue Boards new issue', feature: true, js: true do
     end
 
     it 'does not display new issue button' do
-      expect(page).to have_selector('.board-issue-count-holder .btn', count: 0)
+      expect(page).to have_selector('.issue-count-badge-add-button', count: 0)
     end
   end
 end

spec/features/issuables/related_issues_spec.rb

+require 'rails_helper'
+
+describe 'Related issues', feature: true, js: true do
+  let(:project) { create(:project_empty_repo, :public) }
+  let(:project_b) { create(:project_empty_repo, :public) }
+  let(:project_unauthorized) { create(:project_empty_repo, :public) }
+  let(:issue_a) { create(:issue, project: project) }
+  let(:issue_b) { create(:issue, project: project) }
+  let(:issue_c) { create(:issue, project: project) }
+  let(:issue_d) { create(:issue, project: project) }
+  let(:issue_project_b_a) { create(:issue, project: project_b) }
+  let(:issue_project_unauthorized_a) { create(:issue, project: project_unauthorized) }
+  let(:user) { create(:user) }
+
+  context 'when user has no permission to update related issues' do
+    before do
+      login_as(user)
+    end
+
+    context 'with related_issues enabled' do
+      before do
+        allow_any_instance_of(License).to receive(:feature_available?).and_call_original
+        allow_any_instance_of(License).to receive(:feature_available?).with(:related_issues) { true }
+      end
+
+      context 'with existing related issues' do
+        let!(:issue_link_b) { create :issue_link, source: issue_a, target: issue_b }
+        let!(:issue_link_c) { create :issue_link, source: issue_a, target: issue_c }
+
+        context 'visiting issue_a' do
+          before do
+            visit namespace_project_issue_path(project.namespace, project, issue_a)
+            wait_for_requests
+          end
+
+          it 'shows related issues count' do
+            expect(find('.js-related-issues-header-issue-count')).to have_content('2')
+          end
+
+          it 'does not show add related issue badge button' do
+            expect(page).not_to have_selector('.js-issue-count-badge-add-button')
+          end
+        end
+
+        context 'visiting issue_b which was targeted by issue_a' do
+          before do
+            visit namespace_project_issue_path(project.namespace, project, issue_b)
+            wait_for_requests
+          end
+
+          it 'shows related issues count' do
+            expect(find('.js-related-issues-header-issue-count')).to have_content('1')
+          end
+        end
+      end
+    end
+  end
+
+  context 'when user has permission to update related issues' do
+    before do
+      project.add_master(user)
+      project_b.add_master(user)
+      login_as(user)
+    end
+
+    context 'with related_issues disabled' do
+      let!(:issue_link_b) { create :issue_link, source: issue_a, target: issue_b }
+      let!(:issue_link_c) { create :issue_link, source: issue_a, target: issue_c }
+
+      before do
+        visit namespace_project_issue_path(project.namespace, project, issue_a)
+        wait_for_requests
+      end
+
+      it 'does not show the related issues block' do
+        expect(page).not_to have_selector('.js-related-issues-root')
+      end
+    end
+
+    context 'with related_issues enabled' do
+      before do
+        allow_any_instance_of(License).to receive(:feature_available?).and_call_original
+        allow_any_instance_of(License).to receive(:feature_available?).with(:related_issues) { true }
+      end
+
+      context 'without existing related issues' do
+        before do
+          visit namespace_project_issue_path(project.namespace, project, issue_a)
+          wait_for_requests
+        end
+
+        it 'shows related issues count' do
+          expect(find('.js-related-issues-header-issue-count')).to have_content('0')
+        end
+
+        it 'shows add related issue badge button' do
+          expect(page).to have_selector('.js-issue-count-badge-add-button')
+        end
+
+        it 'add related issue' do
+          find('.js-issue-count-badge-add-button').click
+          find('.js-add-issuable-form-input').set "#{issue_b.to_reference(project)} "
+          find('.js-add-issuable-form-add-button').click
+
+          wait_for_requests
+
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          # Form gets hidden after submission
+          expect(page).not_to have_selector('.js-add-related-issues-form-area')
+          # Check if related issues are present
+          expect(items.count).to eq(1)
+          expect(items[0].text).to eq(issue_b.title)
+          expect(find('.js-related-issues-header-issue-count')).to have_content('1')
+        end
+
+        it 'add cross-project related issue' do
+          find('.js-issue-count-badge-add-button').click
+          find('.js-add-issuable-form-input').set "#{issue_project_b_a.to_reference(project)} "
+          find('.js-add-issuable-form-add-button').click
+
+          wait_for_requests
+
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items.count).to eq(1)
+          expect(items[0].text).to eq(issue_project_b_a.title)
+          expect(find('.js-related-issues-header-issue-count')).to have_content('1')
+        end
+      end
+
+      context 'with existing related issues' do
+        let!(:issue_link_b) { create :issue_link, source: issue_a, target: issue_b }
+        let!(:issue_link_c) { create :issue_link, source: issue_a, target: issue_c }
+
+        before do
+          visit namespace_project_issue_path(project.namespace, project, issue_a)
+          wait_for_requests
+        end
+
+        it 'shows related issues count' do
+          expect(find('.js-related-issues-header-issue-count')).to have_content('2')
+        end
+
+        it 'shows related issues' do
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items.count).to eq(2)
+          expect(items[0].text).to eq(issue_b.title)
+          expect(items[1].text).to eq(issue_c.title)
+        end
+
+        it 'allows us to remove a related issues' do
+          items_before = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items_before.count).to eq(2)
+
+          first('.js-issue-token-remove-button').click
+
+          wait_for_requests
+
+          items_after = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items_after.count).to eq(1)
+        end
+
+        it 'add related issue' do
+          find('.js-issue-count-badge-add-button').click
+          find('.js-add-issuable-form-input').set "##{issue_d.iid} "
+          find('.js-add-issuable-form-add-button').click
+
+          wait_for_requests
+
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items.count).to eq(3)
+          expect(items[0].text).to eq(issue_b.title)
+          expect(items[1].text).to eq(issue_c.title)
+          expect(items[2].text).to eq(issue_d.title)
+          expect(find('.js-related-issues-header-issue-count')).to have_content('3')
+        end
+
+        it 'add invalid related issue' do
+          find('.js-issue-count-badge-add-button').click
+          find('.js-add-issuable-form-input').set "#9999999 "
+          find('.js-add-issuable-form-add-button').click
+
+          wait_for_requests
+
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items.count).to eq(2)
+          expect(items[0].text).to eq(issue_b.title)
+          expect(items[1].text).to eq(issue_c.title)
+          expect(find('.js-related-issues-header-issue-count')).to have_content('2')
+        end
+
+        it 'add unauthorized related issue' do
+          find('.js-issue-count-badge-add-button').click
+          find('.js-add-issuable-form-input').set "#{issue_project_unauthorized_a.to_reference(project)} "
+          find('.js-add-issuable-form-add-button').click
+
+          wait_for_requests
+
+          items = all('.js-related-issues-token-list-item .js-issue-token-title')
+
+          expect(items.count).to eq(2)
+          expect(items[0].text).to eq(issue_b.title)
+          expect(items[1].text).to eq(issue_c.title)
+          expect(find('.js-related-issues-header-issue-count')).to have_content('2')
+        end
+      end
+    end
+  end
+end

spec/javascripts/issuable/related_issues/components/add_issuable_form_spec.js

+import Vue from 'vue';
+import eventHub from '~/issuable/related_issues/event_hub';
+import addIssuableForm from '~/issuable/related_issues/components/add_issuable_form.vue';
+
+const issuable1 = {
+  id: '200',
+  reference: 'foo/bar#123',
+  displayReference: '#123',
+  title: 'some title',
+  path: '/foo/bar/issues/123',
+  state: 'opened',
+};
+
+const issuable2 = {
+  id: '201',
+  reference: 'foo/bar#124',
+  displayReference: '#124',
+  title: 'some other thing',
+  path: '/foo/bar/issues/124',
+  state: 'opened',
+};
+
+describe('AddIssuableForm', () => {
+  let AddIssuableForm;
+  let vm;
+
+  beforeEach(() => {
+    AddIssuableForm = Vue.extend(addIssuableForm);
+  });
+
+  afterEach(() => {
+    if (vm) {
+      // Avoid any NPE errors from `@blur` being called
+      // after `vm.$destroy` in tests, https://github.com/vuejs/vue/issues/5829
+      document.activeElement.blur();
+
+      vm.$destroy();
+    }
+  });
+
+  describe('with data', () => {
+    const inputValue = 'foo #123';
+    const addButtonLabel = 'Add issuable';
+
+    beforeEach(() => {
+      vm = new AddIssuableForm({
+        propsData: {
+          inputValue,
+          addButtonLabel,
+          pendingReferences: [
+            issuable1.reference,
+            issuable2.reference,
+          ],
+        },
+      }).$mount();
+    });
+
+    it('should put button label in place', () => {
+      expect(vm.$refs.addButton.textContent.trim()).toEqual(addButtonLabel);
+    });
+
+    it('should put input value in place', () => {
+      expect(vm.$refs.input.value).toEqual(inputValue);
+    });
+
+    it('should render pending issuables items', () => {
+      expect(vm.$el.querySelectorAll('.js-add-issuable-form-token-list-item').length).toEqual(2);
+    });
+  });
+
+  describe('methods', () => {
+    let addIssuableFormInputSpy;
+    let addIssuableFormBlurSpy;
+    let addIssuableFormSubmitSpy;
+    let addIssuableFormCancelSpy;
+
+    beforeEach(() => {
+      addIssuableFormInputSpy = jasmine.createSpy('spy');
+      addIssuableFormBlurSpy = jasmine.createSpy('spy');
+      addIssuableFormSubmitSpy = jasmine.createSpy('spy');
+      addIssuableFormCancelSpy = jasmine.createSpy('spy');
+      eventHub.$on('addIssuableFormInput', addIssuableFormInputSpy);
+      eventHub.$on('addIssuableFormBlur', addIssuableFormBlurSpy);
+      eventHub.$on('addIssuableFormSubmit', addIssuableFormSubmitSpy);
+      eventHub.$on('addIssuableFormCancel', addIssuableFormCancelSpy);
+
+      const el = document.createElement('div');
+      // We need to append to body to get focus tests working
+      document.body.appendChild(el);
+
+      vm = new AddIssuableForm({
+        propsData: {
+          inputValue: '',
+          addButtonLabel: 'Add issuable',
+          pendingIssuables: [
+            issuable1,
+          ],
+        },
+      }).$mount(el);
+    });
+
+    afterEach(() => {
+      eventHub.$off('addIssuableFormInput', addIssuableFormInputSpy);
+      eventHub.$off('addIssuableFormBlur', addIssuableFormBlurSpy);
+      eventHub.$off('addIssuableFormSubmit', addIssuableFormSubmitSpy);
+      eventHub.$off('addIssuableFormCancel', addIssuableFormCancelSpy);
+    });
+
+    it('when clicking somewhere on the input wrapper should focus the input', (done) => {
+      vm.onInputWrapperClick();
+
+      setTimeout(() => {
+        Vue.nextTick(() => {
+          expect(vm.$refs.issuableFormWrapper.classList.contains('focus')).toEqual(true);
+          expect(document.activeElement).toEqual(vm.$refs.input);
+
+          done();
+        });
+      });
+    });
+
+    it('when filling in the input', () => {
+      expect(addIssuableFormInputSpy).not.toHaveBeenCalled();
+
+      const newInputValue = 'filling in things';
+      vm.$refs.input.value = newInputValue;
+      vm.onInput();
+
+      expect(addIssuableFormInputSpy).toHaveBeenCalledWith(newInputValue, newInputValue.length);
+    });
+
+    it('when blurring the input', (done) => {
+      expect(addIssuableFormInputSpy).not.toHaveBeenCalled();
+
+      const newInputValue = 'filling in things';
+      vm.$refs.input.value = newInputValue;
+      vm.onBlur();
+
+      setTimeout(() => {
+        Vue.nextTick(() => {
+          expect(vm.$refs.issuableFormWrapper.classList.contains('focus')).toEqual(false);
+          expect(addIssuableFormBlurSpy).toHaveBeenCalledWith(newInputValue);
+
+          done();
+        });
+      });
+    });
+
+    it('when submitting pending issues', () => {
+      expect(addIssuableFormSubmitSpy).not.toHaveBeenCalled();
+
+      vm.onFormSubmit();
+
+      expect(addIssuableFormSubmitSpy).toHaveBeenCalled();
+    });
+
+    it('when canceling form to collapse', () => {
+      expect(addIssuableFormCancelSpy).not.toHaveBeenCalled();
+
+      vm.onFormCancel();
+
+      expect(addIssuableFormCancelSpy).toHaveBeenCalled();
+    });
+  });
+});

spec/javascripts/issuable/related_issues/components/issue_token_spec.js

+import Vue from 'vue';
+import eventHub from '~/issuable/related_issues/event_hub';
+import issueToken from '~/issuable/related_issues/components/issue_token.vue';
+
+describe('IssueToken', () => {
+  const idKey = 200;
+  const displayReference = 'foo/bar#123';
+  const title = 'some title';
+  let IssueToken;
+  let vm;
+
+  beforeEach(() => {
+    IssueToken = Vue.extend(issueToken);
+  });
+
+  afterEach(() => {
+    if (vm) {
+      vm.$destroy();
+    }
+  });
+
+  describe('with reference supplied', () => {
+    beforeEach(() => {
+      vm = new IssueToken({
+        propsData: {
+          idKey,
+          displayReference,
+        },
+      }).$mount();
+    });
+
+    it('shows reference', () => {
+      expect(vm.$el.textContent.trim()).toEqual(displayReference);
+    });
+
+    it('does not link without path specified', () => {
+      expect(vm.$refs.link.tagName.toLowerCase()).toEqual('span');
+      expect(vm.$refs.link.getAttribute('href')).toBeNull();
+    });
+  });
+
+  describe('with reference and title supplied', () => {
+    beforeEach(() => {
+      vm = new IssueToken({
+        propsData: {
+          idKey,
+          displayReference,
+          title,
+        },
+      }).$mount();
+    });
+
+    it('shows reference and title', () => {
+      expect(vm.$refs.reference.textContent.trim()).toEqual(displayReference);
+      expect(vm.$refs.title.textContent.trim()).toEqual(title);
+    });
+  });
+
+  describe('with path supplied', () => {
+    const path = '/foo/bar/issues/123';
+    beforeEach(() => {
+      vm = new IssueToken({
+        propsData: {
+          idKey,
+          displayReference,
+          title,
+          path,
+        },
+      }).$mount();
+    });
+
+    it('links reference and title', () => {
+      expect(vm.$refs.link.getAttribute('href')).toEqual(path);
+    });
+  });
+
+  describe('with state supplied', () => {
+    describe('`state: \'opened\'`', () => {
+      beforeEach(() => {
+        vm = new IssueToken({
+          propsData: {
+            idKey,
+            displayReference,
+            state: 'opened',
+          },
+        }).$mount();
+      });
+
+      it('shows green circle icon', () => {
+        expect(vm.$el.querySelector('.issue-token-state-icon-open.fa.fa-circle-o')).toBeDefined();
+      });
+    });
+
+    describe('`state: \'reopened\'`', () => {
+      beforeEach(() => {
+        vm = new IssueToken({
+          propsData: {
+            idKey,
+            displayReference,
+            state: 'reopened',
+          },
+        }).$mount();
+      });
+
+      it('shows green circle icon', () => {
+        expect(vm.$el.querySelector('.issue-token-state-icon-open.fa.fa-circle-o')).toBeDefined();
+      });
+    });
+
+    describe('`state: \'closed\'`', () => {
+      beforeEach(() => {
+        vm = new IssueToken({
+          propsData: {
+            idKey,
+            displayReference,
+            state: 'closed',
+          },
+        }).$mount();
+      });
+
+      it('shows red minus icon', () => {
+        expect(vm.$el.querySelector('.issue-token-state-icon-closed.fa.fa-minus')).toBeDefined();
+      });
+    });
+  });
+
+  describe('with reference, title, state', () => {
+    const state = 'opened';
+    beforeEach(() => {
+      vm = new IssueToken({
+        propsData: {
+          idKey,
+          displayReference,
+          title,
+          state,
+        },
+      }).$mount();
+    });
+
+    it('shows reference, title, and state', () => {
+      expect(vm.$refs.stateIcon.getAttribute('aria-label')).toEqual(state);
+      expect(vm.$refs.reference.textContent.trim()).toEqual(displayReference);
+      expect(vm.$refs.title.textContent.trim()).toEqual(title);
+    });
+  });
+
+  describe('with canRemove', () => {
+    describe('`canRemove: false` (default)', () => {
+      beforeEach(() => {
+        vm = new IssueToken({
+          propsData: {
+            idKey,
+            displayReference,
+          },
+        }).$mount();
+      });
+
+      it('does not have remove button', () => {
+        expect(vm.$el.querySelector('.issue-token-remove-button')).toBeNull();
+      });
+    });
+
+    describe('`canRemove: true`', () => {
+      beforeEach(() => {
+        vm = new IssueToken({
+          propsData: {
+            idKey,
+            displayReference,
+            canRemove: true,
+          },
+        }).$mount();
+      });
+
+      it('has remove button', () => {
+        expect(vm.$el.querySelector('.issue-token-remove-button')).toBeDefined();
+      });
+    });
+  });
+
+  describe('methods', () => {
+    let removeRequestSpy;
+
+    beforeEach(() => {
+      vm = new IssueToken({
+        propsData: {
+          idKey,
+          displayReference,
+        },
+      }).$mount();
+      removeRequestSpy = jasmine.createSpy('spy');
+      eventHub.$on('removeRequest', removeRequestSpy);
+    });
+
+    afterEach(() => {
+      eventHub.$off('removeRequest', removeRequestSpy);
+    });
+
+    it('when getting checked', () => {
+      expect(removeRequestSpy).not.toHaveBeenCalled();
+      vm.onRemoveRequest();
+      expect(removeRequestSpy).toHaveBeenCalled();
+    });
+  });
+});

spec/javascripts/issuable/related_issues/components/related_issues_block_spec.js

+import Vue from 'vue';
+import eventHub from '~/issuable/related_issues/event_hub';
+import relatedIssuesBlock from '~/issuable/related_issues/components/related_issues_block.vue';
+
+const issuable1 = {
+  id: '200',
+  reference: 'foo/bar#123',
+  displayReference: '#123',
+  title: 'some title',
+  path: '/foo/bar/issues/123',
+  state: 'opened',
+};
+
+const issuable2 = {
+  id: '201',
+  reference: 'foo/bar#124',
+  displayReference: '#124',
+  title: 'some other thing',
+  path: '/foo/bar/issues/124',
+  state: 'opened',
+};
+
+describe('RelatedIssuesBlock', () => {
+  let RelatedIssuesBlock;
+  let vm;
+
+  beforeEach(() => {
+    RelatedIssuesBlock = Vue.extend(relatedIssuesBlock);
+  });
+
+  afterEach(() => {
+    if (vm) {
+      vm.$destroy();
+    }
+  });
+
+  describe('with defaults', () => {
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock().$mount();
+    });
+
+    it('unable to add new related issues', () => {
+      expect(vm.$refs.issueCountBadgeAddButton).toBeUndefined();
+    });
+
+    it('add related issues form is hidden', () => {
+      expect(vm.$el.querySelector('.js-add-related-issues-form-area')).toBeNull();
+    });
+
+    it('should not show loading icon', () => {
+      expect(vm.$refs.loadingIcon).toBeUndefined();
+    });
+  });
+
+  describe('with isFetching=true', () => {
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock({
+        propsData: {
+          isFetching: true,
+        },
+      }).$mount();
+    });
+
+    it('should show loading icon', () => {
+      expect(vm.$refs.loadingIcon).toBeDefined();
+    });
+  });
+
+  describe('with canAddRelatedIssues=true', () => {
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock({
+        propsData: {
+          canAddRelatedIssues: true,
+        },
+      }).$mount();
+    });
+
+    it('can add new related issues', () => {
+      expect(vm.$refs.issueCountBadgeAddButton).toBeDefined();
+    });
+  });
+
+  describe('with isFormVisible=true', () => {
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock({
+        propsData: {
+          isFormVisible: true,
+        },
+      }).$mount();
+    });
+
+    it('shows add related issues form', () => {
+      expect(vm.$el.querySelector('.js-add-related-issues-form-area')).toBeDefined();
+    });
+  });
+
+  describe('with relatedIssues', () => {
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock({
+        propsData: {
+          relatedIssues: [
+            issuable1,
+            issuable2,
+          ],
+        },
+      }).$mount();
+    });
+
+    it('should render issue tokens items', () => {
+      expect(vm.$el.querySelectorAll('.js-related-issues-token-list-item').length).toEqual(2);
+    });
+  });
+
+  describe('methods', () => {
+    let toggleAddRelatedIssuesFormSpy;
+
+    beforeEach(() => {
+      vm = new RelatedIssuesBlock({
+        propsData: {
+          relatedIssues: [
+            issuable1,
+          ],
+        },
+      }).$mount();
+      toggleAddRelatedIssuesFormSpy = jasmine.createSpy('spy');
+      eventHub.$on('toggleAddRelatedIssuesForm', toggleAddRelatedIssuesFormSpy);
+    });
+
+    afterEach(() => {
+      eventHub.$off('toggleAddRelatedIssuesForm', toggleAddRelatedIssuesFormSpy);
+    });
+
+    it('when expanding add related issue form', () => {
+      expect(toggleAddRelatedIssuesFormSpy).not.toHaveBeenCalled();
+      vm.toggleAddRelatedIssuesForm();
+      expect(toggleAddRelatedIssuesFormSpy).toHaveBeenCalled();
+    });
+  });
+});

spec/javascripts/issuable/related_issues/components/related_issues_root_spec.js

+import Vue from 'vue';
+import relatedIssuesRoot from '~/issuable/related_issues/components/related_issues_root.vue';
+
+const defaultProps = {
+  endpoint: '/foo/bar/issues/1/related_issues',
+  currentNamespacePath: 'foo',
+  currentProjectPath: 'bar',
+};
+
+const issuable1 = {
+  id: '200',
+  reference: 'foo/bar#123',
+  title: 'issue1',
+  path: '/foo/bar/issues/123',
+  state: 'opened',
+  destroy_relation_path: '/foo/bar/issues/123/related_issues/1',
+};
+
+const issuable2 = {
+  id: '201',
+  reference: 'foo/bar#124',
+  title: 'issue1',
+  path: '/foo/bar/issues/124',
+  state: 'opened',
+  destroy_relation_path: '/foo/bar/issues/124/related_issues/1',
+};
+
+describe('RelatedIssuesRoot', () => {
+  let RelatedIssuesRoot;
+  let vm;
+
+  beforeEach(() => {
+    RelatedIssuesRoot = Vue.extend(relatedIssuesRoot);
+  });
+
+  afterEach(() => {
+    if (vm) {
+      vm.$destroy();
+    }
+  });
+
+  describe('methods', () => {
+    describe('onRelatedIssueRemoveRequest', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+        vm.store.setRelatedIssues([issuable1]);
+      });
+
+      it('remove related issue and succeeds', (done) => {
+        const interceptor = (request, next) => {
+          next(request.respondWith(JSON.stringify({
+            issues: [],
+          }), {
+            status: 200,
+          }));
+        };
+        Vue.http.interceptors.push(interceptor);
+
+        vm.onRelatedIssueRemoveRequest(issuable1.id);
+
+        setTimeout(() => {
+          expect(vm.state.relatedIssues).toEqual([]);
+
+          Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+
+          done();
+        });
+      });
+
+      it('remove related issue, fails, and restores to related issues', (done) => {
+        const interceptor = (request, next) => {
+          next(request.respondWith(JSON.stringify({}), {
+            status: 422,
+          }));
+        };
+        Vue.http.interceptors.push(interceptor);
+
+        vm.onRelatedIssueRemoveRequest(issuable1.id);
+
+        setTimeout(() => {
+          expect(vm.state.relatedIssues.length).toEqual(1);
+          expect(vm.state.relatedIssues[0].id).toEqual(issuable1.id);
+
+          Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+
+          done();
+        });
+      });
+    });
+
+    describe('onToggleAddRelatedIssuesForm', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+      });
+
+      it('toggle related issues form to visible', () => {
+        vm.onToggleAddRelatedIssuesForm();
+
+        expect(vm.isFormVisible).toEqual(true);
+      });
+
+      it('show add related issues form to hidden', () => {
+        vm.isFormVisible = true;
+
+        vm.onToggleAddRelatedIssuesForm();
+
+        expect(vm.isFormVisible).toEqual(false);
+      });
+    });
+
+    describe('onPendingIssueRemoveRequest', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+        vm.store.setPendingReferences([issuable1.reference]);
+      });
+
+      it('remove pending related issue', () => {
+        expect(vm.state.pendingReferences.length).toEqual(1);
+
+        vm.onPendingIssueRemoveRequest(0);
+
+        expect(vm.state.pendingReferences.length).toEqual(0);
+      });
+    });
+
+    describe('onPendingFormSubmit', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+      });
+
+      it('submit zero pending issue as related issue', (done) => {
+        vm.store.setPendingReferences([]);
+        vm.onPendingFormSubmit();
+
+        setTimeout(() => {
+          Vue.nextTick(() => {
+            expect(vm.state.pendingReferences.length).toEqual(0);
+            expect(vm.state.relatedIssues.length).toEqual(0);
+
+            done();
+          });
+        });
+      });
+
+      it('submit pending issue as related issue', (done) => {
+        const interceptor = (request, next) => {
+          next(request.respondWith(JSON.stringify({
+            issues: [issuable1],
+            result: {
+              message: 'something was successfully related',
+              status: 'success',
+            },
+          }), {
+            status: 200,
+          }));
+        };
+        Vue.http.interceptors.push(interceptor);
+
+        vm.store.setPendingReferences([issuable1.reference]);
+        vm.onPendingFormSubmit();
+
+        setTimeout(() => {
+          Vue.nextTick(() => {
+            expect(vm.state.pendingReferences.length).toEqual(0);
+            expect(vm.state.relatedIssues.length).toEqual(1);
+            expect(vm.state.relatedIssues[0].id).toEqual(issuable1.id);
+
+            Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+
+            done();
+          });
+        });
+      });
+
+      it('submit multiple pending issues as related issues', (done) => {
+        const interceptor = (request, next) => {
+          next(request.respondWith(JSON.stringify({
+            issues: [issuable1, issuable2],
+            result: {
+              message: 'something was successfully related',
+              status: 'success',
+            },
+          }), {
+            status: 200,
+          }));
+        };
+        Vue.http.interceptors.push(interceptor);
+
+        vm.store.setPendingReferences([issuable1.reference, issuable2.reference]);
+        vm.onPendingFormSubmit();
+
+        setTimeout(() => {
+          Vue.nextTick(() => {
+            expect(vm.state.pendingReferences.length).toEqual(0);
+            expect(vm.state.relatedIssues.length).toEqual(2);
+            expect(vm.state.relatedIssues[0].id).toEqual(issuable1.id);
+            expect(vm.state.relatedIssues[1].id).toEqual(issuable2.id);
+
+            Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+
+            done();
+          });
+        });
+      });
+    });
+
+    describe('onPendingFormCancel', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+        vm.isFormVisible = true;
+        vm.inputValue = 'foo';
+      });
+
+      it('when canceling and hiding add issuable form', () => {
+        vm.onPendingFormCancel();
+
+        expect(vm.isFormVisible).toEqual(false);
+        expect(vm.inputValue).toEqual('');
+        expect(vm.state.pendingReferences.length).toEqual(0);
+      });
+    });
+
+    describe('fetchRelatedIssues', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+      });
+
+      describe('when the network has not responded yet', () => {
+        it('should be fetching', (done) => {
+          vm.fetchRelatedIssues();
+
+          setTimeout(() => {
+            Vue.nextTick(() => {
+              expect(vm.isFetching).toEqual(true);
+
+              done();
+            });
+          });
+        });
+      });
+
+      describe('when the network responds', () => {
+        const interceptor = (request, next) => {
+          next(request.respondWith(JSON.stringify([issuable1, issuable2]), {
+            status: 200,
+          }));
+        };
+
+        beforeEach(() => {
+          Vue.http.interceptors.push(interceptor);
+        });
+
+        afterEach(() => {
+          Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+        });
+
+        it('should be done fetching', (done) => {
+          vm.fetchRelatedIssues();
+
+          setTimeout(() => {
+            Vue.nextTick(() => {
+              expect(vm.isFetching).toEqual(false);
+
+              done();
+            });
+          });
+        });
+
+        it('should fetch related issues', (done) => {
+          vm.fetchRelatedIssues();
+
+          setTimeout(() => {
+            Vue.nextTick(() => {
+              expect(vm.state.relatedIssues.length).toEqual(2);
+              expect(vm.state.relatedIssues[0].id).toEqual(issuable1.id);
+              expect(vm.state.relatedIssues[1].id).toEqual(issuable2.id);
+
+              done();
+            });
+          });
+        });
+      });
+    });
+
+    describe('onInput', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+      });
+
+      it('fill in issue number reference and adds to pending related issues', () => {
+        const input = '#123 ';
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(1);
+        expect(vm.state.pendingReferences[0]).toEqual('#123');
+      });
+
+      it('fill in with full reference', () => {
+        const input = 'asdf/qwer#444 ';
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(1);
+        expect(vm.state.pendingReferences[0]).toEqual('asdf/qwer#444');
+      });
+
+      it('fill in with issue link', () => {
+        const link = 'http://localhost:3000/foo/bar/issues/111';
+        const input = `${link} `;
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(1);
+        expect(vm.state.pendingReferences[0]).toEqual(link);
+      });
+
+      it('fill in with multiple references', () => {
+        const input = 'asdf/qwer#444 #12 ';
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(2);
+        expect(vm.state.pendingReferences[0]).toEqual('asdf/qwer#444');
+        expect(vm.state.pendingReferences[1]).toEqual('#12');
+      });
+
+      it('fill in with some invalid things', () => {
+        const input = 'something random ';
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(2);
+        expect(vm.state.pendingReferences[0]).toEqual('something');
+        expect(vm.state.pendingReferences[1]).toEqual('random');
+      });
+
+      it('fill in invalid and some legit references', () => {
+        const input = 'something random #123 ';
+        vm.onInput(input, input.length);
+
+        expect(vm.state.pendingReferences.length).toEqual(3);
+        expect(vm.state.pendingReferences[0]).toEqual('something');
+        expect(vm.state.pendingReferences[1]).toEqual('random');
+        expect(vm.state.pendingReferences[2]).toEqual('#123');
+      });
+
+      it('keep reference piece in input while we are touching it', () => {
+        const input = 'a #123 b ';
+        vm.onInput(input, 3);
+
+        expect(vm.state.pendingReferences.length).toEqual(2);
+        expect(vm.state.pendingReferences[0]).toEqual('a');
+        expect(vm.state.pendingReferences[1]).toEqual('b');
+      });
+    });
+
+    describe('onBlur', () => {
+      beforeEach(() => {
+        vm = new RelatedIssuesRoot({
+          propsData: defaultProps,
+        }).$mount();
+      });
+
+      it('add valid reference to pending when blurring', () => {
+        const input = '#123';
+        vm.onBlur(input);
+
+        expect(vm.state.pendingReferences.length).toEqual(1);
+        expect(vm.state.pendingReferences[0]).toEqual('#123');
+      });
+
+      it('add any valid references to pending when blurring', () => {
+        const input = 'asdf #123';
+        vm.onBlur(input);
+
+        expect(vm.state.pendingReferences.length).toEqual(2);
+        expect(vm.state.pendingReferences[0]).toEqual('asdf');
+        expect(vm.state.pendingReferences[1]).toEqual('#123');
+      });
+    });
+  });
+});

spec/javascripts/issuable/related_issues/services/related_issues_service_spec.js

+import _ from 'underscore';
+import Vue from 'vue';
+import RelatedIssuesService from '~/issuable/related_issues/services/related_issues_service';
+
+const issuable1 = {
+  reference: 'foo/bar#123',
+  title: 'some title',
+  path: '/foo/bar/issues/123',
+  state: 'opened',
+  destroy_relation_path: '/foo/bar/issues/123/related_issues/1',
+};
+
+describe('RelatedIssuesService', () => {
+  let service;
+
+  beforeEach(() => {
+    service = new RelatedIssuesService('');
+  });
+
+  describe('fetchRelatedIssues', () => {
+    const interceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify([issuable1]), {
+        status: 200,
+      }));
+    };
+
+    beforeEach(() => {
+      Vue.http.interceptors.push(interceptor);
+    });
+
+    afterEach(() => {
+      Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+    });
+
+    it('fetch related issues', (done) => {
+      service.fetchRelatedIssues()
+        .then(res => res.json())
+        .then((relatedIssues) => {
+          expect(relatedIssues).toEqual([issuable1]);
+          done();
+        })
+        .catch((err) => {
+          done.fail(`Failed to fetch related issues:\n${err}`);
+        });
+    });
+  });
+
+  describe('addRelatedIssues', () => {
+    const interceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify({
+        message: `${issuable1.reference} was successfully related`,
+        status: 'success',
+      }), {
+        status: 200,
+      }));
+    };
+
+    beforeEach(() => {
+      Vue.http.interceptors.push(interceptor);
+    });
+
+    afterEach(() => {
+      Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+    });
+
+    it('add related issues', (done) => {
+      service.addRelatedIssues([issuable1.reference])
+        .then(res => res.json())
+        .then((resData) => {
+          expect(resData.status).toEqual('success');
+          done();
+        })
+        .catch((err) => {
+          done.fail(`Failed to add related issues:\n${err}`);
+        });
+    });
+  });
+
+  describe('removeRelatedIssue', () => {
+    const interceptor = (request, next) => {
+      next(request.respondWith(JSON.stringify({
+        message: 'Relation was removed',
+        status: 'success',
+      }), {
+        status: 200,
+      }));
+    };
+
+    beforeEach(() => {
+      Vue.http.interceptors.push(interceptor);
+    });
+
+    afterEach(() => {
+      Vue.http.interceptors = _.without(Vue.http.interceptors, interceptor);
+    });
+
+    it('remove related issue', (done) => {
+      service.removeRelatedIssue('...')
+        .then(res => res.json())
+        .then((resData) => {
+          expect(resData.status).toEqual('success');
+          done();
+        })
+        .catch((err) => {
+          done.fail(`Failed to fetch issue:\n${err}`);
+        });
+    });
+  });
+});

spec/javascripts/issuable/related_issues/stores/related_issues_store_spec.js

+import RelatedIssuesStore from '~/issuable/related_issues/stores/related_issues_store';
+
+const issuable1 = {
+  id: '200',
+  reference: 'foo/bar#123',
+  title: 'issue1',
+  path: '/foo/bar/issues/123',
+  state: 'opened',
+  destroy_relation_path: '/foo/bar/issues/123/related_issues/1',
+};
+
+const issuable2 = {
+  id: '201',
+  reference: 'foo/bar#124',
+  title: 'issue1',
+  path: '/foo/bar/issues/124',
+  state: 'opened',
+  destroy_relation_path: '/foo/bar/issues/124/related_issues/1',
+};
+
+describe('RelatedIssuesStore', () => {
+  let store;
+
+  beforeEach(() => {
+    store = new RelatedIssuesStore();
+  });
+
+  describe('setRelatedIssues', () => {
+    it('defaults to empty array', () => {
+      expect(store.state.relatedIssues).toEqual([]);
+    });
+
+    it('add issue', () => {
+      const relatedIssues = [issuable1];
+      store.setRelatedIssues(relatedIssues);
+
+      expect(store.state.relatedIssues).toEqual(relatedIssues);
+    });
+  });
+
+  describe('removeRelatedIssue', () => {
+    it('remove issue', () => {
+      const relatedIssues = [issuable1];
+      store.state.relatedIssues = relatedIssues;
+
+      store.removeRelatedIssue(issuable1.id);
+
+      expect(store.state.relatedIssues).toEqual([]);
+    });
+
+    it('remove issue with multiple in store', () => {
+      const relatedIssues = [issuable1, issuable2];
+      store.state.relatedIssues = relatedIssues;
+
+      store.removeRelatedIssue(issuable1.id);
+
+      expect(store.state.relatedIssues).toEqual([issuable2]);
+    });
+  });
+
+  describe('setPendingReferences', () => {
+    it('defaults to empty array', () => {
+      expect(store.state.pendingReferences).toEqual([]);
+    });
+
+    it('add reference', () => {
+      const relatedIssues = [issuable1.reference];
+      store.setPendingReferences(relatedIssues);
+
+      expect(store.state.pendingReferences).toEqual(relatedIssues);
+    });
+  });
+
+  describe('removePendingRelatedIssue', () => {
+    it('remove issue', () => {
+      const relatedIssues = [issuable1.reference];
+      store.state.pendingReferences = relatedIssues;
+
+      store.removePendingRelatedIssue(0);
+
+      expect(store.state.pendingReferences).toEqual([]);
+    });
+
+    it('remove issue with multiple in store', () => {
+      const relatedIssues = [issuable1.reference, issuable2.reference];
+      store.state.pendingReferences = relatedIssues;
+
+      store.removePendingRelatedIssue(0);
+
+      expect(store.state.pendingReferences).toEqual([issuable2.reference]);
+    });
+  });
+});