Add new sections and apply to component

Adds query and UI elements for new linked pipeline display
Some changes to existing components to accomodate

app/assets/javascripts/pipelines/components/graph/graph_component.vue

 <script>
+import LinkedGraphWrapper from '../graph_shared/linked_graph_wrapper.vue';
+import LinkedPipelinesColumn from './linked_pipelines_column.vue';
 import StageColumnComponent from './stage_column_component.vue';
-import { MAIN } from './constants';
+import { DOWNSTREAM, MAIN, UPSTREAM } from './constants';
 
 export default {
   name: 'PipelineGraph',
   components: {
+    LinkedGraphWrapper,
+    LinkedPipelinesColumn,
     StageColumnComponent,
   },
   props: {
@@ -23,10 +27,60 @@ export default {
       default: MAIN,
     },
   },
+  pipelineTypeConstants: {
+    DOWNSTREAM,
+    UPSTREAM,
+  },
+  data() {
+    return {
+      hoveredJobName: '',
+      pipelineExpanded: {
+        jobName: '',
+        expanded: false,
+      },
+    };
+  },
   computed: {
+    downstreamPipelines() {
+      return this.hasDownstreamPipelines ? this.pipeline.downstream : [];
+    },
     graph() {
       return this.pipeline.stages;
     },
+    hasDownstreamPipelines() {
+      return Boolean(this.pipeline?.downstream?.length > 0);
+    },
+    hasUpstreamPipelines() {
+      return Boolean(this.pipeline?.upstream?.length > 0);
+    },
+    // The two show checks prevent upstream / downstream from showing redundant linked columns
+    showDownstreamPipelines() {
+      return (
+        this.hasDownstreamPipelines && this.type !== this.$options.pipelineTypeConstants.UPSTREAM
+      );
+    },
+    showUpstreamPipelines() {
+      return (
+        this.hasUpstreamPipelines && this.type !== this.$options.pipelineTypeConstants.DOWNSTREAM
+      );
+    },
+    upstreamPipelines() {
+      return this.hasUpstreamPipelines ? this.pipeline.upstream : [];
+    },
+  },
+  methods: {
+    handleError(errorType) {
+      this.$emit('error', errorType);
+    },
+    setJob(jobName) {
+      this.hoveredJobName = jobName;
+    },
+    togglePipelineExpanded(jobName, expanded) {
+      this.pipelineExpanded = {
+        expanded,
+        jobName: expanded ? jobName : '',
+      };
+    },
   },
 };
 </script>
@@ -36,13 +90,39 @@ export default {
       class="gl-pipeline-min-h gl-display-flex gl-position-relative gl-overflow-auto gl-bg-gray-10 gl-white-space-nowrap"
       :class="{ 'gl-py-5': !isLinkedPipeline }"
     >
-      <stage-column-component
-        v-for="stage in graph"
-        :key="stage.name"
-        :title="stage.name"
-        :groups="stage.groups"
-        :action="stage.status.action"
-      />
+      <linked-graph-wrapper>
+        <template #upstream>
+          <linked-pipelines-column
+            v-if="showUpstreamPipelines"
+            :linked-pipelines="upstreamPipelines"
+            :column-title="__('Upstream')"
+            :type="$options.pipelineTypeConstants.UPSTREAM"
+            @error="handleError"
+          />
+        </template>
+        <template #main>
+          <stage-column-component
+            v-for="stage in graph"
+            :key="stage.name"
+            :title="stage.name"
+            :groups="stage.groups"
+            :action="stage.status.action"
+            :job-hovered="hoveredJobName"
+            :pipeline-expanded="pipelineExpanded"
+          />
+        </template>
+        <template #downstream>
+          <linked-pipelines-column
+            v-if="showDownstreamPipelines"
+            :linked-pipelines="downstreamPipelines"
+            :column-title="__('Downstream')"
+            :type="$options.pipelineTypeConstants.DOWNSTREAM"
+            @downstreamHovered="setJob"
+            @pipelineExpandToggle="togglePipelineExpanded"
+            @error="handleError"
+          />
+        </template>
+      </linked-graph-wrapper>
     </div>
   </div>
 </template>

app/assets/javascripts/pipelines/components/graph/graph_component_wrapper.vue

@@ -42,7 +42,7 @@ export default {
         };
       },
       update(data) {
-        return unwrapPipelineData(this.pipelineIid, data);
+        return unwrapPipelineData(this.pipelineProjectPath, data);
       },
       error() {
         this.reportFailure(LOAD_FAILURE);
@@ -77,13 +77,11 @@ export default {
 };
 </script>
 <template>
-  <gl-alert v-if="showAlert" :variant="alert.variant" @dismiss="hideAlert">
-    {{ alert.text }}
-  </gl-alert>
-  <gl-loading-icon
-    v-else-if="$apollo.queries.pipeline.loading"
-    class="gl-mx-auto gl-my-4"
-    size="lg"
-  />
-  <pipeline-graph v-else :pipeline="pipeline" />
+  <div>
+    <gl-alert v-if="showAlert" :variant="alert.variant" @dismiss="hideAlert">
+      {{ alert.text }}
+    </gl-alert>
+    <gl-loading-icon v-if="$apollo.queries.pipeline.loading" class="gl-mx-auto gl-my-4" size="lg" />
+    <pipeline-graph v-if="pipeline" :pipeline="pipeline" @error="reportFailure" />
+  </div>
 </template>

app/assets/javascripts/pipelines/components/graph/linked_pipeline.vue

@@ -25,23 +25,33 @@ export default {
       type: String,
       required: true,
     },
-    pipeline: {
-      type: Object,
+    expanded: {
+      type: Boolean,
       required: true,
     },
-    projectId: {
-      type: Number,
+    pipeline: {
+      type: Object,
       required: true,
     },
     type: {
       type: String,
       required: true,
     },
-  },
-  data() {
-    return {
-      expanded: false,
-    };
+    /*
+      The next two props will be removed or required
+      once the graph transition is done.
+      See: https://gitlab.com/gitlab-org/gitlab/-/issues/291043
+    */
+    isLoading: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    projectId: {
+      type: Number,
+      required: false,
+      default: -1,
+    },
   },
   computed: {
     tooltipText() {
@@ -74,6 +84,9 @@ export default {
       }
       return __('Multi-project');
     },
+    pipelineIsLoading() {
+      return Boolean(this.isLoading || this.pipeline.isLoading);
+    },
     isDownstream() {
       return this.type === DOWNSTREAM;
     },
@@ -81,7 +94,9 @@ export default {
       return this.type === UPSTREAM;
     },
     isSameProject() {
-      return this.projectId === this.pipeline.project.id;
+      return this.projectId > -1
+        ? this.projectId === this.pipeline.project.id
+        : !this.pipeline.multiproject;
     },
     sourceJobName() {
       return accessValue(this.dataMethod, 'sourceJob', this.pipeline);
@@ -101,16 +116,15 @@ export default {
   },
   methods: {
     onClickLinkedPipeline() {
-      this.$root.$emit('bv::hide::tooltip', this.buttonId);
-      this.expanded = !this.expanded;
+      this.hideTooltips();
       this.$emit('pipelineClicked', this.$refs.linkedPipeline);
-      this.$emit('pipelineExpandToggle', this.pipeline.source_job.name, this.expanded);
+      this.$emit('pipelineExpandToggle', this.sourceJobName, !this.expanded);
     },
     hideTooltips() {
       this.$root.$emit('bv::hide::tooltip');
     },
     onDownstreamHovered() {
-      this.$emit('downstreamHovered', this.pipeline.source_job.name);
+      this.$emit('downstreamHovered', this.sourceJobName);
     },
     onDownstreamHoverLeave() {
       this.$emit('downstreamHovered', '');
@@ -120,10 +134,10 @@ export default {
 </script>
 
 <template>
-  <li
+  <div
     ref="linkedPipeline"
     v-gl-tooltip
-    class="linked-pipeline build"
+    class="linked-pipeline build gl-pipeline-job-width"
     :title="tooltipText"
     :class="{ 'downstream-pipeline': isDownstream }"
     data-qa-selector="child_pipeline"
@@ -136,8 +150,9 @@ export default {
     >
       <div class="gl-display-flex">
         <ci-status
-          v-if="!pipeline.isLoading"
+          v-if="!pipelineIsLoading"
           :status="pipelineStatus"
+          :size="24"
           css-classes="gl-top-0 gl-pr-2"
         />
         <div v-else class="gl-pr-2"><gl-loading-icon inline /></div>
@@ -160,10 +175,10 @@ export default {
         class="gl-absolute gl-top-0 gl-bottom-0 gl-shadow-none! gl-rounded-0!"
         :class="`js-pipeline-expand-${pipeline.id} ${expandButtonPosition}`"
         :icon="expandedIcon"
-        data-testid="expandPipelineButton"
+        data-testid="expand-pipeline-button"
         data-qa-selector="expand_pipeline_button"
         @click="onClickLinkedPipeline"
       />
     </div>
-  </li>
+  </div>
 </template>

app/assets/javascripts/pipelines/components/graph/linked_pipelines_column.vue

 <script>
+import getPipelineDetails from '../../graphql/queries/get_pipeline_details.query.graphql';
 import LinkedPipeline from './linked_pipeline.vue';
+import { LOAD_FAILURE } from '../../constants';
 import { UPSTREAM } from './constants';
+import { unwrapPipelineData } from './utils';
 
 export default {
   components: {
     LinkedPipeline,
+    PipelineGraph: () => import('./graph_component.vue'),
   },
   props: {
     columnTitle: {
@@ -19,11 +23,22 @@ export default {
       type: String,
       required: true,
     },
-    projectId: {
-      type: Number,
-      required: true,
-    },
   },
+  data() {
+    return {
+      currentPipeline: null,
+      loadingPipelineId: null,
+      pipelineExpanded: false,
+    };
+  },
+  titleClasses: [
+    'gl-font-weight-bold',
+    'gl-pipeline-job-width',
+    'gl-text-truncate',
+    'gl-line-height-36',
+    'gl-pl-3',
+    'gl-mb-5',
+  ],
   computed: {
     columnClass() {
       const positionValues = {
@@ -35,14 +50,66 @@ export default {
     graphPosition() {
       return this.isUpstream ? 'left' : 'right';
     },
-    // Refactor string match when BE returns Upstream/Downstream indicators
     isUpstream() {
       return this.type === UPSTREAM;
     },
+    computedTitleClasses() {
+      const positionalClasses = this.isUpstream
+        ? ['gl-w-full', 'gl-text-right', 'gl-linked-pipeline-padding']
+        : [];
+
+      return [...this.$options.titleClasses, ...positionalClasses];
+    },
   },
   methods: {
-    onPipelineClick(downstreamNode, pipeline, index) {
-      this.$emit('linkedPipelineClick', pipeline, index, downstreamNode);
+    getPipelineData(pipeline) {
+      const projectPath = pipeline.project.fullPath;
+
+      this.$apollo.addSmartQuery('currentPipeline', {
+        query: getPipelineDetails,
+        variables() {
+          return {
+            projectPath,
+            iid: pipeline.iid,
+          };
+        },
+        update(data) {
+          return unwrapPipelineData(projectPath, data);
+        },
+        result() {
+          this.loadingPipelineId = null;
+        },
+        error() {
+          this.$emit('error', LOAD_FAILURE);
+        },
+      });
+    },
+    isExpanded(id) {
+      return Boolean(this.currentPipeline?.id && id === this.currentPipeline.id);
+    },
+    isLoadingPipeline(id) {
+      return this.loadingPipelineId === id;
+    },
+    onPipelineClick(pipeline) {
+      /* If the clicked pipeline has been expanded already, close it, clear, exit */
+      if (this.currentPipeline?.id === pipeline.id) {
+        this.pipelineExpanded = false;
+        this.currentPipeline = null;
+        return;
+      }
+
+      /* Set the loading id */
+      this.loadingPipelineId = pipeline.id;
+
+      /*
+        Expand the pipeline.
+        If this was not a toggle close action, and
+        it was already showing a different pipeline, then
+        this will be a no-op, but that doesn't matter.
+      */
+      this.pipelineExpanded = true;
+
+      this.getPipelineData(pipeline);
     },
     onDownstreamHovered(jobName) {
       this.$emit('downstreamHovered', jobName);
@@ -60,25 +127,40 @@ export default {
 </script>
 
 <template>
-  <div :class="columnClass" class="stage-column linked-pipelines-column">
-    <div class="stage-name linked-pipelines-column-title">{{ columnTitle }}</div>
-    <div v-if="isUpstream" class="cross-project-triangle"></div>
-    <ul>
-      <linked-pipeline
-        v-for="(pipeline, index) in linkedPipelines"
-        :key="pipeline.id"
-        :class="{
-          active: pipeline.isExpanded,
-          'left-connector': pipeline.isExpanded && graphPosition === 'left',
-        }"
-        :pipeline="pipeline"
-        :column-title="columnTitle"
-        :project-id="projectId"
-        :type="type"
-        @pipelineClicked="onPipelineClick($event, pipeline, index)"
-        @downstreamHovered="onDownstreamHovered"
-        @pipelineExpandToggle="onPipelineExpandToggle"
-      />
-    </ul>
+  <div class="gl-display-flex">
+    <div :class="columnClass" class="linked-pipelines-column">
+      <div data-testid="linked-column-title" class="stage-name" :class="computedTitleClasses">
+        {{ columnTitle }}
+      </div>
+      <ul class="gl-pl-0">
+        <li
+          v-for="pipeline in linkedPipelines"
+          :key="pipeline.id"
+          class="gl-display-flex gl-mb-4"
+          :class="{ 'gl-flex-direction-row-reverse': isUpstream }"
+        >
+          <linked-pipeline
+            class="gl-display-inline-block"
+            :is-loading="isLoadingPipeline(pipeline.id)"
+            :pipeline="pipeline"
+            :column-title="columnTitle"
+            :type="type"
+            :expanded="isExpanded(pipeline.id)"
+            @downstreamHovered="onDownstreamHovered"
+            @pipelineClicked="onPipelineClick(pipeline)"
+            @pipelineExpandToggle="onPipelineExpandToggle"
+          />
+          <div v-if="isExpanded(pipeline.id)" class="gl-display-inline-block">
+            <pipeline-graph
+              v-if="currentPipeline"
+              :type="type"
+              class="d-inline-block gl-mt-n2"
+              :pipeline="currentPipeline"
+              :is-linked-pipeline="true"
+            />
+          </div>
+        </li>
+      </ul>
+    </div>
   </div>
 </template>

app/assets/javascripts/pipelines/components/graph/linked_pipelines_column_legacy.vue

@@ -35,7 +35,9 @@ export default {
     graphPosition() {
       return this.isUpstream ? 'left' : 'right';
     },
-    // Refactor string match when BE returns Upstream/Downstream indicators
+    isExpanded() {
+      return this.pipeline?.isExpanded || false;
+    },
     isUpstream() {
       return this.type === UPSTREAM;
     },
@@ -64,21 +66,22 @@ export default {
     <div class="stage-name linked-pipelines-column-title">{{ columnTitle }}</div>
     <div v-if="isUpstream" class="cross-project-triangle"></div>
     <ul>
-      <linked-pipeline
-        v-for="(pipeline, index) in linkedPipelines"
-        :key="pipeline.id"
-        :class="{
-          active: pipeline.isExpanded,
-          'left-connector': pipeline.isExpanded && graphPosition === 'left',
-        }"
-        :pipeline="pipeline"
-        :column-title="columnTitle"
-        :project-id="projectId"
-        :type="type"
-        @pipelineClicked="onPipelineClick($event, pipeline, index)"
-        @downstreamHovered="onDownstreamHovered"
-        @pipelineExpandToggle="onPipelineExpandToggle"
-      />
+      <li v-for="(pipeline, index) in linkedPipelines" :key="pipeline.id">
+        <linked-pipeline
+          :class="{
+            active: pipeline.isExpanded,
+            'left-connector': pipeline.isExpanded && graphPosition === 'left',
+          }"
+          :pipeline="pipeline"
+          :column-title="columnTitle"
+          :project-id="projectId"
+          :type="type"
+          :expanded="isExpanded"
+          @pipelineClicked="onPipelineClick($event, pipeline, index)"
+          @downstreamHovered="onDownstreamHovered"
+          @pipelineExpandToggle="onPipelineExpandToggle"
+        />
+      </li>
     </ul>
   </div>
 </template>

app/assets/javascripts/pipelines/components/graph/utils.js

+import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 import { unwrapStagesWithNeeds } from '../unwrapping_utils';
 
-const addMulti = (mainId, pipeline) => {
-  return { ...pipeline, multiproject: mainId !== pipeline.id };
+const addMulti = (mainPipelineProjectPath, linkedPipeline) => {
+  return {
+    ...linkedPipeline,
+    multiproject: mainPipelineProjectPath !== linkedPipeline.project.fullPath,
+  };
 };
 
-const unwrapPipelineData = (mainPipelineId, data) => {
+const transformId = linkedPipeline => {
+  return { ...linkedPipeline, id: getIdFromGraphQLId(linkedPipeline.id) };
+};
+
+const unwrapPipelineData = (mainPipelineProjectPath, data) => {
   if (!data?.project?.pipeline) {
     return null;
   }
 
+  const { pipeline } = data.project;
+
   const {
-    id,
     upstream,
     downstream,
     stages: { nodes: stages },
-  } = data.project.pipeline;
+  } = pipeline;
 
   const nodes = unwrapStagesWithNeeds(stages);
 
   return {
-    id,
+    ...pipeline,
+    id: getIdFromGraphQLId(pipeline.id),
     stages: nodes,
-    upstream: upstream ? [upstream].map(addMulti.bind(null, mainPipelineId)) : [],
-    downstream: downstream ? downstream.map(addMulti.bind(null, mainPipelineId)) : [],
+    upstream: upstream
+      ? [upstream].map(addMulti.bind(null, mainPipelineProjectPath)).map(transformId)
+      : [],
+    downstream: downstream
+      ? downstream.nodes.map(addMulti.bind(null, mainPipelineProjectPath)).map(transformId)
+      : [],
   };
 };
 

app/assets/javascripts/pipelines/components/graph_shared/linked_graph_wrapper.vue

+<template>
+  <div class="gl-display-flex">
+    <slot name="upstream"></slot>
+    <slot name="main"></slot>
+    <slot name="downstream"></slot>
+  </div>
+</template>

app/assets/javascripts/pipelines/components/graph_shared/main_graph_wrapper.vue

@@ -17,7 +17,7 @@ export default {
 <template>
   <div>
     <div
-      class="gl-display-flex gl-align-items-center gl-w-full gl-px-8 gl-py-4 gl-mb-5"
+      class="gl-display-flex gl-align-items-center gl-w-full gl-px-8 gl-mb-5"
       :class="stageClasses"
     >
       <slot name="stages"> </slot>

app/assets/javascripts/pipelines/graphql/fragments/linked_pipelines.fragment.graphql

+fragment LinkedPipelineData on Pipeline {
+  id
+  iid
+  path
+  status: detailedStatus {
+    group
+    label
+    icon
+  }
+  sourceJob {
+    name
+  }
+  project {
+    name
+    fullPath
+  }
+}

app/assets/javascripts/pipelines/graphql/queries/get_pipeline_details.query.graphql

+#import "../fragments/linked_pipelines.fragment.graphql"
+
 query getPipelineDetails($projectPath: ID!, $iid: ID!) {
   project(fullPath: $projectPath) {
     pipeline(iid: $iid) {
-      id: iid
+      id
+      iid
+      downstream {
+        nodes {
+          ...LinkedPipelineData
+        }
+      }
+      upstream {
+        ...LinkedPipelineData
+      }
       stages {
         nodes {
           name

app/assets/javascripts/pipelines/graphql/queries/get_pipeline_header_data.query.graphql

@@ -2,6 +2,7 @@ query getPipelineHeaderData($fullPath: ID!, $iid: ID!) {
   project(fullPath: $fullPath) {
     pipeline(iid: $iid) {
       id
+      iid
       status
       retryable
       cancelable

app/assets/stylesheets/page_bundles/pipeline.scss

@@ -139,6 +139,10 @@
   width: 186px;
 }
 
+.gl-linked-pipeline-padding {
+  padding-right: 120px;
+}
+
 .gl-build-content {
   @include build-content();
 }

spec/frontend/pipelines/graph/graph_component_legacy_spec.js

@@ -15,8 +15,8 @@ describe('graph component', () => {
   let mediator;
   let wrapper;
 
-  const findExpandPipelineBtn = () => wrapper.find('[data-testid="expandPipelineButton"]');
-  const findAllExpandPipelineBtns = () => wrapper.findAll('[data-testid="expandPipelineButton"]');
+  const findExpandPipelineBtn = () => wrapper.find('[data-testid="expand-pipeline-button"]');
+  const findAllExpandPipelineBtns = () => wrapper.findAll('[data-testid="expand-pipeline-button"]');
   const findStageColumns = () => wrapper.findAll(StageColumnComponentLegacy);
   const findStageColumnAt = i => findStageColumns().at(i);
 

spec/frontend/pipelines/graph/graph_component_spec.js

-import { shallowMount } from '@vue/test-utils';
+import { mount, shallowMount } from '@vue/test-utils';
 import PipelineGraph from '~/pipelines/components/graph/graph_component.vue';
 import StageColumnComponent from '~/pipelines/components/graph/stage_column_component.vue';
 import LinkedPipelinesColumn from '~/pipelines/components/graph/linked_pipelines_column.vue';
-import { unwrapPipelineData } from '~/pipelines/components/graph/utils';
-import { mockPipelineResponse } from './mock_data';
+import { GRAPHQL } from '~/pipelines/components/graph/constants';
+import {
+  generateResponse,
+  mockPipelineResponse,
+  pipelineWithUpstreamDownstream,
+} from './mock_data';
 
 describe('graph component', () => {
   let wrapper;
@@ -11,10 +15,8 @@ describe('graph component', () => {
   const findLinkedColumns = () => wrapper.findAll(LinkedPipelinesColumn);
   const findStageColumns = () => wrapper.findAll(StageColumnComponent);
 
-  const generateResponse = raw => unwrapPipelineData(raw.data.project.pipeline.id, raw.data);
-
   const defaultProps = {
-    pipeline: generateResponse(mockPipelineResponse),
+    pipeline: generateResponse(mockPipelineResponse, 'root/fungi-xoxo'),
   };
 
   const createComponent = ({ mountFn = shallowMount, props = {} } = {}) => {
@@ -23,6 +25,9 @@ describe('graph component', () => {
         ...defaultProps,
         ...props,
       },
+      provide: {
+        dataMethod: GRAPHQL,
+      },
     });
   };
 
@@ -33,7 +38,7 @@ describe('graph component', () => {
 
   describe('with data', () => {
     beforeEach(() => {
-      createComponent();
+      createComponent({ mountFn: mount });
     });
 
     it('renders the main columns in the graph', () => {
@@ -43,11 +48,24 @@ describe('graph component', () => {
 
   describe('when linked pipelines are not present', () => {
     beforeEach(() => {
-      createComponent();
+      createComponent({ mountFn: mount });
     });
 
     it('should not render a linked pipelines column', () => {
       expect(findLinkedColumns()).toHaveLength(0);
     });
   });
+
+  describe('when linked pipelines are present', () => {
+    beforeEach(() => {
+      createComponent({
+        mountFn: mount,
+        props: { pipeline: pipelineWithUpstreamDownstream(mockPipelineResponse) },
+      });
+    });
+
+    it('should render linked pipelines columns', () => {
+      expect(findLinkedColumns()).toHaveLength(2);
+    });
+  });
 });

spec/frontend/pipelines/graph/linked_pipeline_spec.js

@@ -17,7 +17,7 @@ describe('Linked pipeline', () => {
   const findLinkedPipeline = () => wrapper.find({ ref: 'linkedPipeline' });
   const findLoadingIcon = () => wrapper.find(GlLoadingIcon);
   const findPipelineLink = () => wrapper.find('[data-testid="pipelineLink"]');
-  const findExpandButton = () => wrapper.find('[data-testid="expandPipelineButton"]');
+  const findExpandButton = () => wrapper.find('[data-testid="expand-pipeline-button"]');
 
   const createWrapper = (propsData, data = []) => {
     wrapper = mount(LinkedPipelineComponent, {
@@ -40,20 +40,13 @@ describe('Linked pipeline', () => {
       projectId: invalidTriggeredPipelineId,
       columnTitle: 'Downstream',
       type: DOWNSTREAM,
+      expanded: false,
     };
 
     beforeEach(() => {
       createWrapper(props);
     });
 
-    it('should render a list item as the containing element', () => {
-      expect(wrapper.element.tagName).toBe('LI');
-    });
-
-    it('should render a button', () => {
-      expect(findButton().exists()).toBe(true);
-    });
-
     it('should render the project name', () => {
       expect(wrapper.text()).toContain(props.pipeline.project.name);
     });
@@ -105,12 +98,14 @@ describe('Linked pipeline', () => {
       projectId: validTriggeredPipelineId,
       columnTitle: 'Downstream',
       type: DOWNSTREAM,
+      expanded: false,
     };
 
     const upstreamProps = {
       ...downstreamProps,
       columnTitle: 'Upstream',
       type: UPSTREAM,
+      expanded: false,
     };
 
     it('parent/child label container should exist', () => {
@@ -173,7 +168,7 @@ describe('Linked pipeline', () => {
     `(
       '$pipelineType.columnTitle pipeline button icon should be $anglePosition if expanded state is $expanded',
       ({ pipelineType, anglePosition, expanded }) => {
-        createWrapper(pipelineType, { expanded });
+        createWrapper({ ...pipelineType, expanded });
         expect(findExpandButton().props('icon')).toBe(anglePosition);
       },
     );
@@ -185,6 +180,7 @@ describe('Linked pipeline', () => {
       projectId: invalidTriggeredPipelineId,
       columnTitle: 'Downstream',
       type: DOWNSTREAM,
+      expanded: false,
     };
 
     beforeEach(() => {
@@ -202,6 +198,7 @@ describe('Linked pipeline', () => {
       projectId: validTriggeredPipelineId,
       columnTitle: 'Downstream',
       type: DOWNSTREAM,
+      expanded: false,
     };
 
     beforeEach(() => {
@@ -219,10 +216,7 @@ describe('Linked pipeline', () => {
       jest.spyOn(wrapper.vm.$root, '$emit');
       findButton().trigger('click');
 
-      expect(wrapper.vm.$root.$emit.mock.calls[0]).toEqual([
-        'bv::hide::tooltip',
-        'js-linked-pipeline-34993051',
-      ]);
+      expect(wrapper.vm.$root.$emit.mock.calls[0]).toEqual(['bv::hide::tooltip']);
     });
 
     it('should emit downstreamHovered with job name on mouseover', () => {

spec/frontend/pipelines/graph/linked_pipelines_column_spec.js

-import { shallowMount } from '@vue/test-utils';
+import VueApollo from 'vue-apollo';
+import { mount, shallowMount, createLocalVue } from '@vue/test-utils';
+import createMockApollo from 'jest/helpers/mock_apollo_helper';
+import PipelineGraph from '~/pipelines/components/graph/graph_component.vue';
 import LinkedPipelinesColumn from '~/pipelines/components/graph/linked_pipelines_column.vue';
 import LinkedPipeline from '~/pipelines/components/graph/linked_pipeline.vue';
-import { UPSTREAM } from '~/pipelines/components/graph/constants';
-import mockData from './linked_pipelines_mock_data';
+import getPipelineDetails from '~/pipelines/graphql/queries/get_pipeline_details.query.graphql';
+import { DOWNSTREAM, GRAPHQL } from '~/pipelines/components/graph/constants';
+import { LOAD_FAILURE } from '~/pipelines/constants';
+import {
+  mockPipelineResponse,
+  pipelineWithUpstreamDownstream,
+  wrappedPipelineReturn,
+} from './mock_data';
+
+const processedPipeline = pipelineWithUpstreamDownstream(mockPipelineResponse);
 
 describe('Linked Pipelines Column', () => {
-  const propsData = {
+  const defaultProps = {
     columnTitle: 'Upstream',
-    linkedPipelines: mockData.triggered,
-    graphPosition: 'right',
-    projectId: 19,
-    type: UPSTREAM,
+    linkedPipelines: processedPipeline.downstream,
+    type: DOWNSTREAM,
   };
+
   let wrapper;
+  const findLinkedColumnTitle = () => wrapper.find('[data-testid="linked-column-title"]');
+  const findLinkedPipelineElements = () => wrapper.findAll(LinkedPipeline);
+  const findPipelineGraph = () => wrapper.find(PipelineGraph);
+  const findExpandButton = () => wrapper.find('[data-testid="expand-pipeline-button"]');
 
-  beforeEach(() => {
-    wrapper = shallowMount(LinkedPipelinesColumn, { propsData });
-  });
+  const localVue = createLocalVue();
+  localVue.use(VueApollo);
+
+  const createComponent = ({ apolloProvider, mountFn = shallowMount, props = {} } = {}) => {
+    wrapper = mountFn(LinkedPipelinesColumn, {
+      apolloProvider,
+      localVue,
+      propsData: {
+        ...defaultProps,
+        ...props,
+      },
+      provide: {
+        dataMethod: GRAPHQL,
+      },
+    });
+  };
+
+  const createComponentWithApollo = (
+    mountFn = shallowMount,
+    getPipelineDetailsHandler = jest.fn().mockResolvedValue(wrappedPipelineReturn),
+  ) => {
+    const requestHandlers = [[getPipelineDetails, getPipelineDetailsHandler]];
+
+    const apolloProvider = createMockApollo(requestHandlers);
+    createComponent({ apolloProvider, mountFn });
+  };
 
   afterEach(() => {
     wrapper.destroy();
+    wrapper = null;
   });
 
-  it('renders the pipeline orientation', () => {
-    const titleElement = wrapper.find('.linked-pipelines-column-title');
+  describe('it renders correctly', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('renders the pipeline title', () => {
+      expect(findLinkedColumnTitle().text()).toBe(defaultProps.columnTitle);
+    });
 
-    expect(titleElement.text()).toBe(propsData.columnTitle);
+    it('renders the correct number of linked pipelines', () => {
+      expect(findLinkedPipelineElements()).toHaveLength(defaultProps.linkedPipelines.length);
+    });
   });
 
-  it('renders the correct number of linked pipelines', () => {
-    const linkedPipelineElements = wrapper.findAll(LinkedPipeline);
+  describe('click action', () => {
+    const clickExpandButton = async () => {
+      await findExpandButton().trigger('click');
+      await wrapper.vm.$nextTick();
+    };
 
-    expect(linkedPipelineElements.length).toBe(propsData.linkedPipelines.length);
-  });
+    const clickExpandButtonAndAwaitTimers = async () => {
+      await clickExpandButton();
+      jest.runOnlyPendingTimers();
+      await wrapper.vm.$nextTick();
+    };
+
+    describe('when successful', () => {
+      beforeEach(() => {
+        createComponentWithApollo(mount);
+      });
+
+      it('toggles the pipeline visibility', async () => {
+        expect(findPipelineGraph().exists()).toBe(false);
+        await clickExpandButtonAndAwaitTimers();
+        expect(findPipelineGraph().exists()).toBe(true);
+        await clickExpandButton();
+        expect(findPipelineGraph().exists()).toBe(false);
+      });
+    });
+
+    describe('on error', () => {
+      beforeEach(() => {
+        createComponentWithApollo(mount, jest.fn().mockRejectedValue(new Error('GraphQL error')));
+      });
+
+      it('emits the error', async () => {
+        await clickExpandButton();
+        expect(wrapper.emitted().error).toEqual([[LOAD_FAILURE]]);
+      });
 
-  it('renders cross project triangle when column is upstream', () => {
-    expect(wrapper.find('.cross-project-triangle').exists()).toBe(true);
+      it('does not show the pipeline', async () => {
+        expect(findPipelineGraph().exists()).toBe(false);
+        await clickExpandButtonAndAwaitTimers();
+        expect(findPipelineGraph().exists()).toBe(false);
+      });
+    });
   });
 });

spec/frontend/pipelines/graph/mock_data.js

+import { unwrapPipelineData } from '~/pipelines/components/graph/utils';
+
 export const mockPipelineResponse = {
   data: {
     project: {
       __typename: 'Project',
       pipeline: {
         __typename: 'Pipeline',
-        id: '22',
+        id: 163,
+        iid: '22',
+        downstream: null,
+        upstream: null,
         stages: {
           __typename: 'CiStageConnection',
           nodes: [
@@ -497,3 +502,164 @@ export const mockPipelineResponse = {
     },
   },
 };
+
+export const downstream = {
+  nodes: [
+    {
+      id: 175,
+      iid: '31',
+      path: '/root/elemenohpee/-/pipelines/175',
+      status: {
+        group: 'success',
+        label: 'passed',
+        icon: 'status_success',
+        __typename: 'DetailedStatus',
+      },
+      sourceJob: {
+        name: 'test_c',
+        __typename: 'CiJob',
+      },
+      project: {
+        id: 'gid://gitlab/Project/25',
+        name: 'elemenohpee',
+        fullPath: 'root/elemenohpee',
+        __typename: 'Project',
+      },
+      __typename: 'Pipeline',
+      multiproject: true,
+    },
+    {
+      id: 181,
+      iid: '27',
+      path: '/root/abcd-dag/-/pipelines/181',
+      status: {
+        group: 'success',
+        label: 'passed',
+        icon: 'status_success',
+        __typename: 'DetailedStatus',
+      },
+      sourceJob: {
+        name: 'test_d',
+        __typename: 'CiJob',
+      },
+      project: {
+        id: 'gid://gitlab/Project/23',
+        name: 'abcd-dag',
+        fullPath: 'root/abcd-dag',
+        __typename: 'Project',
+      },
+      __typename: 'Pipeline',
+      multiproject: false,
+    },
+  ],
+};
+
+export const upstream = {
+  id: 161,
+  iid: '24',
+  path: '/root/abcd-dag/-/pipelines/161',
+  status: {
+    group: 'success',
+    label: 'passed',
+    icon: 'status_success',
+    __typename: 'DetailedStatus',
+  },
+  sourceJob: null,
+  project: {
+    id: 'gid://gitlab/Project/23',
+    name: 'abcd-dag',
+    fullPath: 'root/abcd-dag',
+    __typename: 'Project',
+  },
+  __typename: 'Pipeline',
+  multiproject: true,
+};
+
+export const wrappedPipelineReturn = {
+  data: {
+    project: {
+      pipeline: {
+        id: 'gid://gitlab/Ci::Pipeline/175',
+        iid: '38',
+        downstream: {
+          nodes: [],
+        },
+        upstream: {
+          id: 'gid://gitlab/Ci::Pipeline/174',
+          iid: '37',
+          path: '/root/elemenohpee/-/pipelines/174',
+          status: {
+            group: 'success',
+            label: 'passed',
+            icon: 'status_success',
+          },
+          sourceJob: {
+            name: 'test_c',
+          },
+          project: {
+            id: 'gid://gitlab/Project/25',
+            name: 'elemenohpee',
+            fullPath: 'root/elemenohpee',
+          },
+        },
+        stages: {
+          nodes: [
+            {
+              name: 'build',
+              status: {
+                action: null,
+              },
+              groups: {
+                nodes: [
+                  {
+                    status: {
+                      label: 'passed',
+                      group: 'success',
+                      icon: 'status_success',
+                    },
+                    name: 'build_n',
+                    size: 1,
+                    jobs: {
+                      nodes: [
+                        {
+                          name: 'build_n',
+                          scheduledAt: null,
+                          needs: {
+                            nodes: [],
+                          },
+                          status: {
+                            icon: 'status_success',
+                            tooltip: 'passed',
+                            hasDetails: true,
+                            detailsPath: '/root/elemenohpee/-/jobs/1662',
+                            group: 'success',
+                            action: {
+                              buttonTitle: 'Retry this job',
+                              icon: 'retry',
+                              path: '/root/elemenohpee/-/jobs/1662/retry',
+                              title: 'Retry',
+                            },
+                          },
+                        },
+                      ],
+                    },
+                  },
+                ],
+              },
+            },
+          ],
+        },
+      },
+    },
+  },
+};
+
+export const generateResponse = (raw, mockPath) => unwrapPipelineData(mockPath, raw.data);
+
+export const pipelineWithUpstreamDownstream = base => {
+  const pip = { ...base };
+  pip.data.project.pipeline.downstream = downstream;
+  pip.data.project.pipeline.upstream = upstream;
+
+  return generateResponse(pip, 'root/abcd-dag');
+};