Adds the base graph

Adds new files, adapts previous

app/assets/javascripts/pipelines/components/dag/constants.js

+export const PARSE_FAILURE = 'parse_failure';
+export const LOAD_FAILURE = 'load_failure';
+export const UNSUPPORTED_DATA = 'unsupported_data';
+export const DEFAULT = 'default';

app/assets/javascripts/pipelines/components/dag/dag.vue

 <script>
 import { GlAlert } from '@gitlab/ui';
 import axios from '~/lib/utils/axios_utils';
+import { __ } from '~/locale';
+import DagGraph from './dag_graph.vue';
+import { DEFAULT, PARSE_FAILURE, LOAD_FAILURE, UNSUPPORTED_DATA } from './constants';
+import { parseData } from './utils';
 
 export default {
   // eslint-disable-next-line @gitlab/require-i18n-strings
   name: 'Dag',
   components: {
+    DagGraph,
     GlAlert,
   },
   props: {
@@ -18,15 +23,47 @@ export default {
   data() {
     return {
       showFailureAlert: false,
+      failureType: null,
+      graphData: null,
     };
   },
+  errorTexts: {
+    [LOAD_FAILURE]: __('We are currently unable to fetch data for this graph.'),
+    [PARSE_FAILURE]: __('There was an error parsing the data for this graph.'),
+    [UNSUPPORTED_DATA]: __('A DAG must have two dependent jobs to be visualized on this tab.'),
+    [DEFAULT]: __('An unknown error occurred while loading this graph.'),
+  },
   computed: {
+    failure() {
+      switch (this.failureType) {
+        case LOAD_FAILURE:
+          return {
+            text: this.$options.errorTexts[LOAD_FAILURE],
+            variant: 'danger',
+          };
+        case PARSE_FAILURE:
+          return {
+            text: this.$options.errorTexts[PARSE_FAILURE],
+            variant: 'danger',
+          };
+        case UNSUPPORTED_DATA:
+          return {
+            text: this.$options.errorTexts[UNSUPPORTED_DATA],
+            variant: 'info',
+          };
+        default:
+          return {
+            text: this.$options.errorTexts[DEFAULT],
+            vatiant: 'danger',
+          };
+      }
+    },
     shouldDisplayGraph() {
-      return !this.showFailureAlert;
+      return Boolean(!this.showFailureAlert && this.graphData);
     },
   },
   mounted() {
-    const { drawGraph, reportFailure } = this;
+    const { processGraphData, reportFailure } = this;
 
     if (!this.graphUrl) {
       reportFailure();
@@ -36,30 +73,43 @@ export default {
     axios
       .get(this.graphUrl)
       .then(response => {
-        drawGraph(response.data);
+        processGraphData(response.data);
       })
-      .catch(reportFailure);
+      .catch(() => reportFailure(LOAD_FAILURE));
   },
   methods: {
-    drawGraph(data) {
-      return data;
+    processGraphData(data) {
+      let parsed;
+
+      try {
+        parsed = parseData(data.stages);
+      } catch {
+        this.reportFailure(PARSE_FAILURE);
+        return;
+      }
+
+      if (parsed.links.length < 2) {
+        this.reportFailure(UNSUPPORTED_DATA);
+        return;
+      }
+
+      this.graphData = parsed;
     },
     hideAlert() {
       this.showFailureAlert = false;
     },
-    reportFailure() {
+    reportFailure(type) {
       this.showFailureAlert = true;
+      this.failureType = type;
     },
   },
 };
 </script>
 <template>
   <div>
-    <gl-alert v-if="showFailureAlert" variant="danger" @dismiss="hideAlert">
-      {{ __('We are currently unable to fetch data for this graph.') }}
+    <gl-alert v-if="showFailureAlert" :variant="failure.variant" @dismiss="hideAlert">
+      {{ failure.text }}
     </gl-alert>
-    <div v-if="shouldDisplayGraph" data-testid="dag-graph-container">
-      <!-- graph goes here -->
-    </div>
+    <dag-graph v-if="shouldDisplayGraph" :graph-data="graphData" @onFailure="reportFailure" />
   </div>
 </template>

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

@@ -141,7 +141,13 @@ export const parseData = data => {
     values for the nodes and links in the graph.
   */
 
-export const createSankey = ({ width, height, nodeWidth, nodePadding, paddingForLabels }) => {
+export const createSankey = ({
+  width = 10,
+  height = 10,
+  nodeWidth = 10,
+  nodePadding = 10,
+  paddingForLabels = 1,
+} = {}) => {
   const sankeyGenerator = sankey()
     .nodeId(({ name }) => name)
     .nodeAlign(sankeyLeft)

locale/gitlab.pot

@@ -867,6 +867,9 @@ msgstr ""
 msgid "A .NET Core console application template, customizable for any .NET Core project"
 msgstr ""
 
+msgid "A DAG must have two dependent jobs to be visualized on this tab."
+msgstr ""
+
 msgid "A GitBook site that uses Netlify for CI/CD instead of GitLab, but still with all the other great GitLab features."
 msgstr ""
 
@@ -2404,6 +2407,9 @@ msgstr ""
 msgid "An unexpected error occurred while stopping the Web Terminal."
 msgstr ""
 
+msgid "An unknown error occurred while loading this graph."
+msgstr ""
+
 msgid "Analytics"
 msgstr ""
 
@@ -22064,6 +22070,9 @@ msgstr ""
 msgid "There was an error loading users activity calendar."
 msgstr ""
 
+msgid "There was an error parsing the data for this graph."
+msgstr ""
+
 msgid "There was an error removing the e-mail."
 msgstr ""
 

package.json

@@ -70,6 +70,7 @@
     "core-js": "^3.6.4",
     "cropper": "^2.3.0",
     "css-loader": "^2.1.1",
+    "d3": "^5.16.0",
     "d3-sankey": "^0.12.3",
     "d3-scale": "^2.2.2",
     "d3-selection": "^1.2.0",

spec/frontend/pipelines/components/dag/dag_graph_spec.js

+import { mount } from '@vue/test-utils';
+import DagGraph from '~/pipelines/components/dag/dag_graph.vue';
+import { createSankey, removeOrphanNodes } from '~/pipelines/components/dag/utils';
+import { parsedData } from './mock_data';
+
+describe('The DAG graph', () => {
+  let wrapper;
+
+  const getGraph = () => wrapper.find('.dag-graph-container > svg');
+  const getAllLinks = () => wrapper.findAll('.dag-link');
+  const getAllNodes = () => wrapper.findAll('.dag-node');
+  const getAllLabels = () => wrapper.findAll('foreignObject');
+
+  const createComponent = (propsData = {}) => {
+    if (wrapper?.destroy) {
+      wrapper.destroy();
+    }
+
+    wrapper = mount(DagGraph, {
+      attachToDocument: true,
+      propsData,
+      data() {
+        return {
+          color: () => {},
+          width: 0,
+          height: 0,
+        };
+      },
+    });
+  };
+
+  beforeEach(() => {
+    createComponent({ graphData: parsedData });
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  describe('in the basic case', () => {
+    beforeEach(() => {
+      /*
+        The graph uses random to offset links. To keep the snapshot consistent,
+        we mock Math.random. Wheeeee!
+      */
+      const randomNumber = jest.spyOn(global.Math, 'random');
+      randomNumber.mockImplementation(() => 0.2);
+      createComponent({ graphData: parsedData });
+    });
+
+    it('renders the graph svg', () => {
+      expect(getGraph().exists()).toBe(true);
+      expect(getGraph().html()).toMatchSnapshot();
+    });
+  });
+
+  describe('links', () => {
+    it('renders the expected number of links', () => {
+      expect(getAllLinks()).toHaveLength(parsedData.links.length);
+    });
+
+    it('renders the expected number of gradients', () => {
+      expect(wrapper.findAll('linearGradient')).toHaveLength(parsedData.links.length);
+    });
+
+    it('renders the expected number of clip paths', () => {
+      expect(wrapper.findAll('clipPath')).toHaveLength(parsedData.links.length);
+    });
+  });
+
+  describe('nodes and labels', () => {
+    const sankeyNodes = createSankey()(parsedData).nodes;
+    const processedNodes = removeOrphanNodes(sankeyNodes);
+
+    describe('nodes', () => {
+      it('renders the expected number of nodes', () => {
+        expect(getAllNodes()).toHaveLength(processedNodes.length);
+      });
+    });
+
+    describe('labels', () => {
+      it('renders the expected number of labels as foreignObjects', () => {
+        expect(getAllLabels()).toHaveLength(processedNodes.length);
+      });
+
+      it('renders the title as text', () => {
+        expect(
+          getAllLabels()
+            .at(0)
+            .text(),
+        ).toBe(parsedData.nodes[0].name);
+      });
+    });
+  });
+});

spec/frontend/pipelines/components/dag/dag_spec.js

-import { mount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import MockAdapter from 'axios-mock-adapter';
 import axios from '~/lib/utils/axios_utils';
 import waitForPromises from 'helpers/wait_for_promises';
 import { GlAlert } from '@gitlab/ui';
 import Dag from '~/pipelines/components/dag/dag.vue';
+import DagGraph from '~/pipelines/components/dag/dag_graph.vue';
 
-describe('Pipeline DAG graph', () => {
+import {
+  DEFAULT,
+  PARSE_FAILURE,
+  LOAD_FAILURE,
+  UNSUPPORTED_DATA,
+} from '~/pipelines/components/dag//constants';
+import { mockBaseData, tooSmallGraph, unparseableGraph } from './mock_data';
+
+describe('Pipeline DAG graph wrapper', () => {
   let wrapper;
-  let axiosMock;
+  let mock;
   const getAlert = () => wrapper.find(GlAlert);
-  const getGraph = () => wrapper.find('[data-testid="dag-graph-container"]');
-
-  const dataPath = 'root/test/pipelines/90/dag.json';
+  const getGraph = () => wrapper.find(DagGraph);
+  const getErrorText = type => wrapper.vm.$options.errorTexts[type];
 
-  const createComponent = (propsData = {}, method = mount) => {
-    axiosMock = new MockAdapter(axios);
+  const dataPath = '/root/test/pipelines/90/dag.json';
 
+  const createComponent = (propsData = {}) => {
     if (wrapper?.destroy) {
       wrapper.destroy();
     }
 
-    wrapper = method(Dag, {
+    wrapper = shallowMount(Dag, {
       propsData,
       data() {
         return {
@@ -30,8 +38,12 @@ describe('Pipeline DAG graph', () => {
     });
   };
 
+  beforeEach(() => {
+    mock = new MockAdapter(axios);
+  });
+
   afterEach(() => {
-    axiosMock.restore();
+    mock.restore();
     wrapper.destroy();
     wrapper = null;
   });
@@ -41,34 +53,80 @@ describe('Pipeline DAG graph', () => {
       createComponent({ graphUrl: undefined });
     });
 
-    it('shows the alert and not the graph', () => {
+    it('shows the DEFAULT alert and not the graph', () => {
       expect(getAlert().exists()).toBe(true);
+      expect(getAlert().text()).toBe(getErrorText(DEFAULT));
       expect(getGraph().exists()).toBe(false);
     });
   });
 
   describe('when there is a dataUrl', () => {
-    beforeEach(() => {
-      createComponent({ graphUrl: dataPath });
+    describe('but the data fetch fails', () => {
+      beforeEach(() => {
+        mock.onGet(dataPath).replyOnce(500);
+        createComponent({ graphUrl: dataPath });
+      });
+
+      it('shows the LOAD_FAILURE alert and not the graph', () => {
+        return wrapper.vm
+          .$nextTick()
+          .then(waitForPromises)
+          .then(() => {
+            expect(getAlert().exists()).toBe(true);
+            expect(getAlert().text()).toBe(getErrorText(LOAD_FAILURE));
+            expect(getGraph().exists()).toBe(false);
+          });
+      });
     });
 
-    it('shows the graph and not the alert', () => {
-      expect(getAlert().exists()).toBe(false);
-      expect(getGraph().exists()).toBe(true);
+    describe('the data fetch succeeds but the parse fails', () => {
+      beforeEach(() => {
+        mock.onGet(dataPath).replyOnce(200, unparseableGraph);
+        createComponent({ graphUrl: dataPath });
+      });
+
+      it('shows the PARSE_FAILURE alert and not the graph', () => {
+        return wrapper.vm
+          .$nextTick()
+          .then(waitForPromises)
+          .then(() => {
+            expect(getAlert().exists()).toBe(true);
+            expect(getAlert().text()).toBe(getErrorText(PARSE_FAILURE));
+            expect(getGraph().exists()).toBe(false);
+          });
+      });
     });
 
-    describe('but the data fetch fails', () => {
+    describe('and the data fetch and parse succeeds', () => {
+      beforeEach(() => {
+        mock.onGet(dataPath).replyOnce(200, mockBaseData);
+        createComponent({ graphUrl: dataPath });
+      });
+
+      it('shows the graph and not the alert', () => {
+        return wrapper.vm
+          .$nextTick()
+          .then(waitForPromises)
+          .then(() => {
+            expect(getAlert().exists()).toBe(false);
+            expect(getGraph().exists()).toBe(true);
+          });
+      });
+    });
+
+    describe('the data fetch and parse succeeds, but the resulting graph is too small', () => {
       beforeEach(() => {
-        axiosMock.onGet(dataPath).replyOnce(500);
+        mock.onGet(dataPath).replyOnce(200, tooSmallGraph);
         createComponent({ graphUrl: dataPath });
       });
 
-      it('shows the alert and not the graph', () => {
+      it('shows the UNSUPPORTED_DATA alert and not the graph', () => {
         return wrapper.vm
           .$nextTick()
           .then(waitForPromises)
           .then(() => {
             expect(getAlert().exists()).toBe(true);
+            expect(getAlert().text()).toBe(getErrorText(UNSUPPORTED_DATA));
             expect(getGraph().exists()).toBe(false);
           });
       });

spec/frontend/pipelines/components/dag/mock_data.js

@@ -3,7 +3,7 @@
   as well as non-parallel jobs with spaces in the name to prevent
   us relying on spaces as an indicator.
 */
-export default {
+export const mockBaseData = {
   stages: [
     {
       name: 'test',
@@ -42,3 +42,349 @@ export default {
     },
   ],
 };
+
+export const tooSmallGraph = {
+  stages: [
+    {
+      name: 'test',
+      groups: [
+        {
+          name: 'jest',
+          size: 2,
+          jobs: [{ name: 'jest 1/2' }, { name: 'jest 2/2' }],
+        },
+        {
+          name: 'rspec',
+          size: 1,
+          jobs: [{ name: 'rspec', needs: ['frontend fixtures'] }],
+        },
+      ],
+    },
+    {
+      name: 'fixtures',
+      groups: [
+        {
+          name: 'frontend fixtures',
+          size: 1,
+          jobs: [{ name: 'frontend fixtures' }],
+        },
+      ],
+    },
+    {
+      name: 'un-needed',
+      groups: [
+        {
+          name: 'un-needed',
+          size: 1,
+          jobs: [{ name: 'un-needed' }],
+        },
+      ],
+    },
+  ],
+};
+
+export const unparseableGraph = [
+  {
+    name: 'test',
+    groups: [
+      {
+        name: 'jest',
+        size: 2,
+        jobs: [{ name: 'jest 1/2', needs: ['frontend fixtures'] }, { name: 'jest 2/2' }],
+      },
+      {
+        name: 'rspec',
+        size: 1,
+        jobs: [{ name: 'rspec', needs: ['frontend fixtures'] }],
+      },
+    ],
+  },
+  {
+    name: 'un-needed',
+    groups: [
+      {
+        name: 'un-needed',
+        size: 1,
+        jobs: [{ name: 'un-needed' }],
+      },
+    ],
+  },
+];
+
+/*
+  This represents data that has been parsed by the wrapper
+*/
+export const parsedData = {
+  nodes: [
+    {
+      name: 'build_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'build_a',
+        },
+      ],
+      category: 'build',
+    },
+    {
+      name: 'build_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'build_b',
+        },
+      ],
+      category: 'build',
+    },
+    {
+      name: 'test_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'test_a',
+          needs: ['build_a'],
+        },
+      ],
+      category: 'test',
+    },
+    {
+      name: 'test_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'test_b',
+        },
+      ],
+      category: 'test',
+    },
+    {
+      name: 'test_c',
+      size: 1,
+      jobs: [
+        {
+          name: 'test_c',
+        },
+      ],
+      category: 'test',
+    },
+    {
+      name: 'test_d',
+      size: 1,
+      jobs: [
+        {
+          name: 'test_d',
+        },
+      ],
+      category: 'test',
+    },
+    {
+      name: 'post_test_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'post_test_a',
+        },
+      ],
+      category: 'post-test',
+    },
+    {
+      name: 'post_test_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'post_test_b',
+        },
+      ],
+      category: 'post-test',
+    },
+    {
+      name: 'post_test_c',
+      size: 1,
+      jobs: [
+        {
+          name: 'post_test_c',
+          needs: ['test_a', 'test_b'],
+        },
+      ],
+      category: 'post-test',
+    },
+    {
+      name: 'staging_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'staging_a',
+          needs: ['post_test_a'],
+        },
+      ],
+      category: 'staging',
+    },
+    {
+      name: 'staging_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'staging_b',
+          needs: ['post_test_b'],
+        },
+      ],
+      category: 'staging',
+    },
+    {
+      name: 'staging_c',
+      size: 1,
+      jobs: [
+        {
+          name: 'staging_c',
+        },
+      ],
+      category: 'staging',
+    },
+    {
+      name: 'staging_d',
+      size: 1,
+      jobs: [
+        {
+          name: 'staging_d',
+        },
+      ],
+      category: 'staging',
+    },
+    {
+      name: 'staging_e',
+      size: 1,
+      jobs: [
+        {
+          name: 'staging_e',
+        },
+      ],
+      category: 'staging',
+    },
+    {
+      name: 'canary_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'canary_a',
+          needs: ['staging_a', 'staging_b'],
+        },
+      ],
+      category: 'canary',
+    },
+    {
+      name: 'canary_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'canary_b',
+        },
+      ],
+      category: 'canary',
+    },
+    {
+      name: 'canary_c',
+      size: 1,
+      jobs: [
+        {
+          name: 'canary_c',
+          needs: ['staging_b'],
+        },
+      ],
+      category: 'canary',
+    },
+    {
+      name: 'production_a',
+      size: 1,
+      jobs: [
+        {
+          name: 'production_a',
+          needs: ['canary_a'],
+        },
+      ],
+      category: 'production',
+    },
+    {
+      name: 'production_b',
+      size: 1,
+      jobs: [
+        {
+          name: 'production_b',
+        },
+      ],
+      category: 'production',
+    },
+    {
+      name: 'production_c',
+      size: 1,
+      jobs: [
+        {
+          name: 'production_c',
+        },
+      ],
+      category: 'production',
+    },
+    {
+      name: 'production_d',
+      size: 1,
+      jobs: [
+        {
+          name: 'production_d',
+          needs: ['canary_c'],
+        },
+      ],
+      category: 'production',
+    },
+  ],
+  links: [
+    {
+      source: 'build_a',
+      target: 'test_a',
+      value: 10,
+    },
+    {
+      source: 'test_a',
+      target: 'post_test_c',
+      value: 10,
+    },
+    {
+      source: 'test_b',
+      target: 'post_test_c',
+      value: 10,
+    },
+    {
+      source: 'post_test_a',
+      target: 'staging_a',
+      value: 10,
+    },
+    {
+      source: 'post_test_b',
+      target: 'staging_b',
+      value: 10,
+    },
+    {
+      source: 'staging_a',
+      target: 'canary_a',
+      value: 10,
+    },
+    {
+      source: 'staging_b',
+      target: 'canary_a',
+      value: 10,
+    },
+    {
+      source: 'staging_b',
+      target: 'canary_c',
+      value: 10,
+    },
+    {
+      source: 'canary_a',
+      target: 'production_a',
+      value: 10,
+    },
+    {
+      source: 'canary_c',
+      target: 'production_d',
+      value: 10,
+    },
+  ],
+};

spec/frontend/pipelines/components/dag/utils_spec.js

@@ -8,12 +8,12 @@ import {
   getMaxNodes,
 } from '~/pipelines/components/dag/utils';
 
-import mockGraphData from './mock_data';
+import { mockBaseData } from './mock_data';
 
 describe('DAG visualization parsing utilities', () => {
-  const { nodes, nodeDict } = createNodesStructure(mockGraphData.stages);
+  const { nodes, nodeDict } = createNodesStructure(mockBaseData.stages);
   const unfilteredLinks = makeLinksFromNodes(nodes, nodeDict);
-  const parsed = parseData(mockGraphData.stages);
+  const parsed = parseData(mockBaseData.stages);
 
   const layoutSettings = {
     width: 200,
@@ -30,10 +30,10 @@ describe('DAG visualization parsing utilities', () => {
     const parallelJobName = 'jest 1/2';
     const singleJobName = 'frontend fixtures';
 
-    const { name, jobs, size } = mockGraphData.stages[0].groups[0];
+    const { name, jobs, size } = mockBaseData.stages[0].groups[0];
 
     it('returns the expected node structure', () => {
-      expect(nodes[0]).toHaveProperty('category', mockGraphData.stages[0].name);
+      expect(nodes[0]).toHaveProperty('category', mockBaseData.stages[0].name);
       expect(nodes[0]).toHaveProperty('name', name);
       expect(nodes[0]).toHaveProperty('jobs', jobs);
       expect(nodes[0]).toHaveProperty('size', size);

yarn.lock

@@ -3551,10 +3551,10 @@ d3-zoom@1:
     d3-selection "1"
     d3-transition "1"
 
-d3@^5.14, d3@^5.7.0:
-  version "5.15.0"
-  resolved "https://registry.yarnpkg.com/d3/-/d3-5.15.0.tgz#ffd44958e6a3cb8a59a84429c45429b8bca5677a"
-  integrity sha512-C+E80SL2nLLtmykZ6klwYj5rPqB5nlfN5LdWEAVdWPppqTD8taoJi2PxLZjPeYT8FFRR2yucXq+kBlOnnvZeLg==
+d3@^5.14, d3@^5.16.0, d3@^5.7.0:
+  version "5.16.0"
+  resolved "https://registry.yarnpkg.com/d3/-/d3-5.16.0.tgz#9c5e8d3b56403c79d4ed42fbd62f6113f199c877"
+  integrity sha512-4PL5hHaHwX4m7Zr1UapXW23apo6pexCgdetdJ5kTmADpG/7T9Gkxw0M0tf/pjoB63ezCCm0u5UaFYy2aMt0Mcw==
   dependencies:
     d3-array "1"
     d3-axis "1"