From b3aa2dc2f28e71dc656b1f4396517baecdd5b1b2 Mon Sep 17 00:00:00 2001
From: samdbeckham <sbeckham@gitlab.com>
Date: Tue, 20 Aug 2019 10:03:48 +0100
Subject: [PATCH] Adds dependency scanning API reports to the MR

- Uses the backend API to parse dependency scanning logic on the MR page
- Maps the slightly misaligned data in the vulnerabilities
- Uses polling because the end point is a polling one
- Adds an action for storing the endpoint in vuex
- Adds a new action for calling the endpoint
- Puts all the above behind a feature flag
- Adds action tests
- Adds mutation tests
- Adds component tests
- creates a pollUntilComplete function for easier reusability
- creates a `parseDiff` util to make migration simpler
---
 .../grouped_security_reports_app.vue          |  21 ++-
 .../security_reports/store/actions.js         |  73 ++++++---
 .../security_reports/store/mutation_types.js  |   2 +
 .../security_reports/store/mutations.js       |  25 +--
 .../security_reports/store/state.js           |   1 +
 .../security_reports/store/utils.js           |  21 +++
 .../security_reports/store/mutations_spec.js  |  58 +++++++
 .../grouped_security_reports_app_spec.js      | 118 +++++++++-----
 .../security_reports/store/actions_spec.js    | 144 ++++++++++++++++++
 9 files changed, 396 insertions(+), 67 deletions(-)

diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/grouped_security_reports_app.vue b/ee/app/assets/javascripts/vue_shared/security_reports/grouped_security_reports_app.vue
index ab98b376d4d293..83fd2ccf7dd035 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/grouped_security_reports_app.vue
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/grouped_security_reports_app.vue
@@ -171,6 +171,11 @@ export default {
     shouldRenderSastContainer() {
       const { head, diffEndpoint } = this.sastContainer.paths;
 
+      return head || diffEndpoint;
+    },
+    shouldRenderDependencyScanning() {
+      const { head, diffEndpoint } = this.dependencyScanning.paths;
+
       return head || diffEndpoint;
     },
   },
@@ -229,7 +234,17 @@ export default {
       this.fetchDastReports();
     }
 
-    if (this.dependencyScanningHeadPath) {
+    const dependencyScanningDiffEndpoint =
+      gl && gl.mrWidgetData && gl.mrWidgetData.dependency_scanning_comparison_path;
+
+    if (
+      gon.features &&
+      gon.features.dependencyScanningMergeRequestReportApi &&
+      dependencyScanningDiffEndpoint
+    ) {
+      this.setDependencyScanningDiffEndpoint(dependencyScanningDiffEndpoint);
+      this.fetchDependencyScanningDiff();
+    } else if (this.dependencyScanningHeadPath) {
       this.setDependencyScanningHeadPath(this.dependencyScanningHeadPath);
 
       if (this.dependencyScanningBasePath) {
@@ -274,6 +289,8 @@ export default {
       'hideDismissalDeleteButtons',
       'fetchSastContainerDiff',
       'setSastContainerDiffEndpoint',
+      'fetchDependencyScanningDiff',
+      'setDependencyScanningDiffEndpoint',
     ]),
     ...mapActions('sast', {
       setSastHeadPath: 'setHeadPath',
@@ -322,7 +339,7 @@ export default {
         />
       </template>
 
-      <template v-if="dependencyScanningHeadPath">
+      <template v-if="shouldRenderDependencyScanning">
         <summary-row
           :summary="groupedDependencyText"
           :status-icon="dependencyScanningStatusIcon"
diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/store/actions.js b/ee/app/assets/javascripts/vue_shared/security_reports/store/actions.js
index 4411b16d55e1e2..9a2cd6836d6c7e 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/store/actions.js
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/store/actions.js
@@ -18,6 +18,28 @@ import httpStatusCodes from '~/lib/utils/http_status';
 
 const hideModal = () => $('#modal-mrwidget-security-issue').modal('hide');
 
+const pollUntilComplete = endpoint =>
+  new Promise((resolve, reject) => {
+    const eTagPoll = new Poll({
+      resource: {
+        getReports(url) {
+          return axios.get(url);
+        },
+      },
+      data: endpoint,
+      method: 'getReports',
+      successCallback: response => {
+        if (response.status === httpStatusCodes.OK) {
+          resolve(response);
+          eTagPoll.stop();
+        }
+      },
+      errorCallback: reject,
+    });
+
+    eTagPoll.makeRequest();
+  });
+
 export const setHeadBlobPath = ({ commit }, blobPath) => commit(types.SET_HEAD_BLOB_PATH, blobPath);
 
 export const setBaseBlobPath = ({ commit }, blobPath) => commit(types.SET_BASE_BLOB_PATH, blobPath);
@@ -74,29 +96,8 @@ export const receiveSastContainerDiffSuccess = ({ commit }, response) =>
 export const fetchSastContainerDiff = ({ state, dispatch }) => {
   dispatch('requestSastContainerReports');
 
-  const pollPromise = new Promise((resolve, reject) => {
-    const eTagPoll = new Poll({
-      resource: {
-        getReports(endpoint) {
-          return axios.get(endpoint);
-        },
-      },
-      data: state.sastContainer.paths.diffEndpoint,
-      method: 'getReports',
-      successCallback: response => {
-        if (response.status === httpStatusCodes.OK) {
-          resolve(response);
-          eTagPoll.stop();
-        }
-      },
-      errorCallback: reject,
-    });
-
-    eTagPoll.makeRequest();
-  });
-
   return Promise.all([
-    pollPromise,
+    pollUntilComplete(state.sastContainer.paths.diffEndpoint),
     axios.get(state.vulnerabilityFeedbackPath, {
       params: {
         category: 'container_scanning',
@@ -194,6 +195,9 @@ export const setDependencyScanningHeadPath = ({ commit }, path) =>
 export const setDependencyScanningBasePath = ({ commit }, path) =>
   commit(types.SET_DEPENDENCY_SCANNING_BASE_PATH, path);
 
+export const setDependencyScanningDiffEndpoint = ({ commit }, path) =>
+  commit(types.SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT, path);
+
 export const requestDependencyScanningReports = ({ commit }) =>
   commit(types.REQUEST_DEPENDENCY_SCANNING_REPORTS);
 
@@ -203,6 +207,31 @@ export const receiveDependencyScanningReports = ({ commit }, response) =>
 export const receiveDependencyScanningError = ({ commit }, error) =>
   commit(types.RECEIVE_DEPENDENCY_SCANNING_ERROR, error);
 
+export const receiveDependencyScanningDiffSuccess = ({ commit }, response) =>
+  commit(types.RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS, response);
+
+export const fetchDependencyScanningDiff = ({ state, dispatch }) => {
+  dispatch('requestDependencyScanningReports');
+
+  return Promise.all([
+    pollUntilComplete(state.dependencyScanning.paths.diffEndpoint),
+    axios.get(state.vulnerabilityFeedbackPath, {
+      params: {
+        category: 'dependency_scanning',
+      },
+    }),
+  ])
+    .then(values => {
+      dispatch('receiveDependencyScanningDiffSuccess', {
+        diff: values[0].data,
+        enrichData: values[1].data,
+      });
+    })
+    .catch(() => {
+      dispatch('receiveDependencyScanningError');
+    });
+};
+
 export const fetchDependencyScanningReports = ({ state, dispatch }) => {
   const { base, head } = state.dependencyScanning.paths;
 
diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/store/mutation_types.js b/ee/app/assets/javascripts/vue_shared/security_reports/store/mutation_types.js
index 4235fd54d9c2ca..93e98dbc5cec66 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/store/mutation_types.js
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/store/mutation_types.js
@@ -32,9 +32,11 @@ export const RECEIVE_DAST_ERROR = 'RECEIVE_DAST_ERROR';
 // DEPENDENCY_SCANNING
 export const SET_DEPENDENCY_SCANNING_HEAD_PATH = 'SET_DEPENDENCY_SCANNING_HEAD_PATH';
 export const SET_DEPENDENCY_SCANNING_BASE_PATH = 'SET_DEPENDENCY_SCANNING_BASE_PATH';
+export const SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT = 'SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT';
 export const REQUEST_DEPENDENCY_SCANNING_REPORTS = 'REQUEST_DEPENDENCY_SCANNING_REPORTS';
 export const RECEIVE_DEPENDENCY_SCANNING_REPORTS = 'RECEIVE_DEPENDENCY_SCANNING_REPORTS';
 export const RECEIVE_DEPENDENCY_SCANNING_ERROR = 'RECEIVE_DEPENDENCY_SCANNING_ERROR';
+export const RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS = 'RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS';
 
 // Dismiss security issue
 export const SET_ISSUE_MODAL_DATA = 'SET_ISSUE_MODAL_DATA';
diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/store/mutations.js b/ee/app/assets/javascripts/vue_shared/security_reports/store/mutations.js
index 8c0e76a482c885..621de3895e644a 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/store/mutations.js
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/store/mutations.js
@@ -5,7 +5,7 @@ import {
   parseDastIssues,
   getUnapprovedVulnerabilities,
   findIssueIndex,
-  enrichVulnerabilityWithFeedback,
+  parseDiff,
 } from './utils';
 import filterByKey from './utils/filter_by_key';
 import { parseSastContainer } from './utils/container_scanning';
@@ -106,18 +106,12 @@ export default {
   },
 
   [types.RECEIVE_SAST_CONTAINER_DIFF_SUCCESS](state, { diff, enrichData }) {
-    const fillInTheGaps = vulnerability => ({
-      ...enrichVulnerabilityWithFeedback(vulnerability, enrichData),
-      category: vulnerability.report_type,
-      title: vulnerability.message || vulnerability.name,
-    });
-
-    const added = diff.added ? diff.added.map(fillInTheGaps) : [];
-    const fixed = diff.fixed ? diff.fixed.map(fillInTheGaps) : [];
+    const { added, fixed, existing } = parseDiff(diff, enrichData);
 
     Vue.set(state.sastContainer, 'isLoading', false);
     Vue.set(state.sastContainer, 'newIssues', added);
     Vue.set(state.sastContainer, 'resolvedIssues', fixed);
+    Vue.set(state.sastContainer, 'allIssues', existing);
   },
 
   [types.RECEIVE_SAST_CONTAINER_ERROR](state) {
@@ -173,6 +167,10 @@ export default {
     Vue.set(state.dependencyScanning.paths, 'base', path);
   },
 
+  [types.SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT](state, path) {
+    Vue.set(state.dependencyScanning.paths, 'diffEndpoint', path);
+  },
+
   [types.REQUEST_DEPENDENCY_SCANNING_REPORTS](state) {
     Vue.set(state.dependencyScanning, 'isLoading', true);
   },
@@ -227,6 +225,15 @@ export default {
     }
   },
 
+  [types.RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS](state, { diff, enrichData }) {
+    const { added, fixed, existing } = parseDiff(diff, enrichData);
+
+    Vue.set(state.dependencyScanning, 'isLoading', false);
+    Vue.set(state.dependencyScanning, 'newIssues', added);
+    Vue.set(state.dependencyScanning, 'resolvedIssues', fixed);
+    Vue.set(state.dependencyScanning, 'allIssues', existing);
+  },
+
   [types.RECEIVE_DEPENDENCY_SCANNING_ERROR](state) {
     Vue.set(state.dependencyScanning, 'isLoading', false);
     Vue.set(state.dependencyScanning, 'hasError', true);
diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/store/state.js b/ee/app/assets/javascripts/vue_shared/security_reports/store/state.js
index 5c8777a6309739..7d1cd8927f4a85 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/store/state.js
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/store/state.js
@@ -46,6 +46,7 @@ export default () => ({
     paths: {
       head: null,
       base: null,
+      diffEndpoint: null,
     },
 
     isLoading: false,
diff --git a/ee/app/assets/javascripts/vue_shared/security_reports/store/utils.js b/ee/app/assets/javascripts/vue_shared/security_reports/store/utils.js
index 4db9891135b196..b119be8839937d 100644
--- a/ee/app/assets/javascripts/vue_shared/security_reports/store/utils.js
+++ b/ee/app/assets/javascripts/vue_shared/security_reports/store/utils.js
@@ -420,3 +420,24 @@ export const groupedReportText = (report, reportType, errorMessage, loadingMessa
     paths,
   });
 };
+
+/**
+ * Generates the added, fixed, and existing vulnerabilities from the API report.
+ *
+ * @param {Object} diff The original reports.
+ * @param {Object} enrichData Feedback data to add to the reports.
+ * @returns {Object}
+ */
+export const parseDiff = (diff, enrichData) => {
+  const enrichVulnerability = vulnerability => ({
+    ...enrichVulnerabilityWithFeedback(vulnerability, enrichData),
+    category: vulnerability.report_type,
+    title: vulnerability.message || vulnerability.name,
+  });
+
+  return {
+    added: diff.added ? diff.added.map(enrichVulnerability) : [],
+    fixed: diff.fixed ? diff.fixed.map(enrichVulnerability) : [],
+    existing: diff.existing ? diff.existing.map(enrichVulnerability) : [],
+  };
+};
diff --git a/ee/spec/frontend/vue_shared/security_reports/store/mutations_spec.js b/ee/spec/frontend/vue_shared/security_reports/store/mutations_spec.js
index e78a7dcfba8caf..6dd4696824fe0f 100644
--- a/ee/spec/frontend/vue_shared/security_reports/store/mutations_spec.js
+++ b/ee/spec/frontend/vue_shared/security_reports/store/mutations_spec.js
@@ -840,4 +840,62 @@ describe('security reports mutations', () => {
       });
     });
   });
+
+  describe('SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT', () => {
+    const endpoint = 'dependency_scannning_diff_endpoint.json';
+
+    beforeEach(() => {
+      mutations[types.SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT](stateCopy, endpoint);
+    });
+
+    it('should set the correct endpoint', () => {
+      expect(stateCopy.dependencyScanning.paths.diffEndpoint).toEqual(endpoint);
+    });
+  });
+
+  describe('RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS', () => {
+    let reports = {};
+
+    beforeEach(() => {
+      reports = {
+        diff: {
+          added: [
+            { name: 'added vuln 1', report_type: 'dependency_scanning' },
+            { name: 'added vuln 2', report_type: 'dependency_scanning' },
+          ],
+          fixed: [{ name: 'fixed vuln 1', report_type: 'dependency_scanning' }],
+          existing: [{ name: 'existing vuln 1', report_type: 'dependency_scanning' }],
+        },
+      };
+      mutations[types.RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS](stateCopy, reports);
+    });
+
+    it('should set isLoading to false', () => {
+      expect(stateCopy.dependencyScanning.isLoading).toBe(false);
+    });
+
+    it('should parse and set the added vulnerabilities', () => {
+      reports.diff.added.forEach((vuln, i) => {
+        expect(stateCopy.dependencyScanning.newIssues[i]).toEqual(
+          expect.objectContaining({
+            name: vuln.name,
+            title: vuln.name,
+            category: vuln.report_type,
+          }),
+        );
+      });
+    });
+
+    it('should parse and set the fixed vulnerabilities', () => {
+      reports.diff.fixed.forEach((vuln, i) => {
+        expect(stateCopy.dependencyScanning.resolvedIssues[i]).toEqual(
+          expect.objectContaining({
+            name: vuln.name,
+            title: vuln.name,
+            category: vuln.report_type,
+          }),
+        );
+      });
+    });
+  });
 });
diff --git a/ee/spec/javascripts/vue_shared/security_reports/grouped_security_reports_app_spec.js b/ee/spec/javascripts/vue_shared/security_reports/grouped_security_reports_app_spec.js
index f9fdfd9228e676..38813a0b2271a5 100644
--- a/ee/spec/javascripts/vue_shared/security_reports/grouped_security_reports_app_spec.js
+++ b/ee/spec/javascripts/vue_shared/security_reports/grouped_security_reports_app_spec.js
@@ -273,50 +273,100 @@ describe('Grouped security reports app', () => {
   });
 
   describe('with the reports API enabled', () => {
-    const sastContainerEndpoint = 'sast_container.json';
+    describe('container scanning reports', () => {
+      const sastContainerEndpoint = 'sast_container.json';
 
-    beforeEach(done => {
-      gon.features = gon.features || {};
-      gon.features.containerScanningMergeRequestReportApi = true;
+      beforeEach(done => {
+        gon.features = gon.features || {};
+        gon.features.containerScanningMergeRequestReportApi = true;
 
-      gl.mrWidgetData = gl.mrWidgetData || {};
-      gl.mrWidgetData.container_scanning_comparison_path = sastContainerEndpoint;
+        gl.mrWidgetData = gl.mrWidgetData || {};
+        gl.mrWidgetData.container_scanning_comparison_path = sastContainerEndpoint;
 
-      mock.onGet(sastContainerEndpoint).reply(200, {
-        added: [dockerReport.vulnerabilities[0], dockerReport.vulnerabilities[1]],
-        fixed: [dockerReport.vulnerabilities[2]],
-      });
+        mock.onGet(sastContainerEndpoint).reply(200, {
+          added: [dockerReport.vulnerabilities[0], dockerReport.vulnerabilities[1]],
+          fixed: [dockerReport.vulnerabilities[2]],
+        });
 
-      mock.onGet('vulnerability_feedback_path.json').reply(200, []);
+        mock.onGet('vulnerability_feedback_path.json').reply(200, []);
+
+        vm = mountComponent(Component, {
+          headBlobPath: 'path',
+          baseBlobPath: 'path',
+          sastHelpPath: 'path',
+          sastContainerHelpPath: 'path',
+          dastHelpPath: 'path',
+          dependencyScanningHelpPath: 'path',
+          vulnerabilityFeedbackPath: 'vulnerability_feedback_path.json',
+          vulnerabilityFeedbackHelpPath: 'path',
+          pipelineId: 123,
+          canCreateIssue: true,
+          canCreateMergeRequest: true,
+          canDismissVulnerability: true,
+        });
 
-      vm = mountComponent(Component, {
-        headBlobPath: 'path',
-        baseBlobPath: 'path',
-        sastHelpPath: 'path',
-        sastContainerHelpPath: 'path',
-        dastHelpPath: 'path',
-        dependencyScanningHelpPath: 'path',
-        vulnerabilityFeedbackPath: 'vulnerability_feedback_path.json',
-        vulnerabilityFeedbackHelpPath: 'path',
-        pipelineId: 123,
-        canCreateIssue: true,
-        canCreateMergeRequest: true,
-        canDismissVulnerability: true,
+        waitForMutation(vm.$store, types.RECEIVE_SAST_CONTAINER_DIFF_SUCCESS)
+          .then(done)
+          .catch(done.fail);
       });
 
-      waitForMutation(vm.$store, types.RECEIVE_SAST_CONTAINER_DIFF_SUCCESS)
-        .then(done)
-        .catch();
-    });
+      it('should set setSastContainerDiffEndpoint', () => {
+        expect(vm.sastContainer.paths.diffEndpoint).toEqual(sastContainerEndpoint);
+      });
 
-    it('should set setSastContainerDiffEndpoint', () => {
-      expect(vm.sastContainer.paths.diffEndpoint).toEqual(sastContainerEndpoint);
+      it('should call `fetchSastContainerDiff`', () => {
+        expect(vm.$el.textContent).toContain(
+          'Container scanning detected 2 new, and 1 fixed vulnerabilities',
+        );
+      });
     });
 
-    it('should call `fetchSastContainerDiff`', () => {
-      expect(vm.$el.textContent).toContain(
-        'Container scanning detected 2 new, and 1 fixed vulnerabilities',
-      );
+    describe('dependency scanning reports', () => {
+      const dependencyScanningEndpoint = 'dependency_scanning.json';
+
+      beforeEach(done => {
+        gon.features = gon.features || {};
+        gon.features.dependencyScanningMergeRequestReportApi = true;
+
+        gl.mrWidgetData = gl.mrWidgetData || {};
+        gl.mrWidgetData.dependency_scanning_comparison_path = dependencyScanningEndpoint;
+
+        mock.onGet(dependencyScanningEndpoint).reply(200, {
+          added: [dockerReport.vulnerabilities[0], dockerReport.vulnerabilities[1]],
+          fixed: [dockerReport.vulnerabilities[2]],
+        });
+
+        mock.onGet('vulnerability_feedback_path.json').reply(200, []);
+
+        vm = mountComponent(Component, {
+          headBlobPath: 'path',
+          baseBlobPath: 'path',
+          sastHelpPath: 'path',
+          sastContainerHelpPath: 'path',
+          dastHelpPath: 'path',
+          dependencyScanningHelpPath: 'path',
+          vulnerabilityFeedbackPath: 'vulnerability_feedback_path.json',
+          vulnerabilityFeedbackHelpPath: 'path',
+          pipelineId: 123,
+          canCreateIssue: true,
+          canCreateMergeRequest: true,
+          canDismissVulnerability: true,
+        });
+
+        waitForMutation(vm.$store, types.RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS)
+          .then(done)
+          .catch();
+      });
+
+      it('should set setDependencyScanningDiffEndpoint', () => {
+        expect(vm.dependencyScanning.paths.diffEndpoint).toEqual(dependencyScanningEndpoint);
+      });
+
+      it('should call `fetchDependencyScanningDiff`', () => {
+        expect(vm.$el.textContent).toContain(
+          'Dependency scanning detected 2 new, and 1 fixed vulnerabilities',
+        );
+      });
     });
   });
 });
diff --git a/ee/spec/javascripts/vue_shared/security_reports/store/actions_spec.js b/ee/spec/javascripts/vue_shared/security_reports/store/actions_spec.js
index 65da6446566e92..e18057ca72675a 100644
--- a/ee/spec/javascripts/vue_shared/security_reports/store/actions_spec.js
+++ b/ee/spec/javascripts/vue_shared/security_reports/store/actions_spec.js
@@ -58,6 +58,9 @@ import actions, {
   setSastContainerDiffEndpoint,
   receiveSastContainerDiffSuccess,
   fetchSastContainerDiff,
+  setDependencyScanningDiffEndpoint,
+  receiveDependencyScanningDiffSuccess,
+  fetchDependencyScanningDiff,
 } from 'ee/vue_shared/security_reports/store/actions';
 import * as types from 'ee/vue_shared/security_reports/store/mutation_types';
 import state from 'ee/vue_shared/security_reports/store/state';
@@ -72,6 +75,7 @@ import {
   sastFeedbacks,
   dastFeedbacks,
   containerScanningFeedbacks,
+  dependencyScanningFeedbacks,
 } from '../mock_data';
 
 const createVulnerability = options => ({
@@ -1728,4 +1732,144 @@ describe('security reports actions', () => {
       });
     });
   });
+
+  describe('setDependencyScanningDiffEndpoint', () => {
+    it('should pass down the endpoint to the mutation', done => {
+      const payload = '/dependency_scanning_endpoint.json';
+
+      testAction(
+        setDependencyScanningDiffEndpoint,
+        payload,
+        mockedState,
+        [
+          {
+            type: types.SET_DEPENDENCY_SCANNING_DIFF_ENDPOINT,
+            payload,
+          },
+        ],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('receiveDependencyScanningDiffSuccess', () => {
+    it('should pass down the response to the mutation', done => {
+      const payload = { data: 'Effort yields its own rewards.' };
+
+      testAction(
+        receiveDependencyScanningDiffSuccess,
+        payload,
+        mockedState,
+        [
+          {
+            type: types.RECEIVE_DEPENDENCY_SCANNING_DIFF_SUCCESS,
+            payload,
+          },
+        ],
+        [],
+        done,
+      );
+    });
+  });
+
+  describe('fetchDependencyScanningDiff', () => {
+    const diff = { foo: {} };
+
+    beforeEach(() => {
+      mockedState.vulnerabilityFeedbackPath = 'vulnerabilities_feedback';
+      mockedState.dependencyScanning.paths.diffEndpoint = 'dependency_scanning_diff.json';
+    });
+
+    describe('on success', () => {
+      it('should dispatch `receiveDependencyScanningDiffSuccess`', done => {
+        mock.onGet('dependency_scanning_diff.json').reply(200, diff);
+        mock
+          .onGet('vulnerabilities_feedback', {
+            params: {
+              category: 'dependency_scanning',
+            },
+          })
+          .reply(200, dependencyScanningFeedbacks);
+
+        testAction(
+          fetchDependencyScanningDiff,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestDependencyScanningReports',
+            },
+            {
+              type: 'receiveDependencyScanningDiffSuccess',
+              payload: {
+                diff,
+                enrichData: dependencyScanningFeedbacks,
+              },
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('when vulnerabilities path errors', () => {
+      it('should dispatch `receiveDependencyScanningError`', done => {
+        mock.onGet('dependency_scanning_diff.json').reply(500);
+        mock
+          .onGet('vulnerabilities_feedback', {
+            params: {
+              category: 'dependency_scanning',
+            },
+          })
+          .reply(200, dependencyScanningFeedbacks);
+
+        testAction(
+          fetchDependencyScanningDiff,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestDependencyScanningReports',
+            },
+            {
+              type: 'receiveDependencyScanningError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+
+    describe('when feedback path errors', () => {
+      it('should dispatch `receiveDependencyScanningError`', done => {
+        mock.onGet('dependency_scanning_diff.json').reply(200, diff);
+        mock
+          .onGet('vulnerabilities_feedback', {
+            params: {
+              category: 'dependency_scanning',
+            },
+          })
+          .reply(500);
+
+        testAction(
+          fetchDependencyScanningDiff,
+          null,
+          mockedState,
+          [],
+          [
+            {
+              type: 'requestDependencyScanningReports',
+            },
+            {
+              type: 'receiveDependencyScanningError',
+            },
+          ],
+          done,
+        );
+      });
+    });
+  });
 });
-- 
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