Create specs for diffs/components/app and update modules to export factory functions

app/assets/javascripts/diffs/store/modules/diff_state.js

@@ -11,8 +11,10 @@ export default () => ({
   endpoint: '',
   basePath: '',
   commit: null,
+  startVersion: null,
   diffFiles: [],
   mergeRequestDiffs: [],
+  mergeRequestDiff: null,
   diffLineCommentForms: {},
   diffViewType: viewTypeFromQueryString || viewTypeFromCookie || defaultViewType,
 });

app/assets/javascripts/diffs/store/modules/index.js

@@ -3,10 +3,10 @@ import * as getters from '../getters';
 import mutations from '../mutations';
 import createState from './diff_state';
-export default {
+export default () => ({
   namespaced: true,
   state: createState(),
   getters,
   actions,
   mutations,
-};
+});

app/assets/javascripts/mr_notes/stores/index.js

@@ -9,7 +9,7 @@ Vue.use(Vuex);
 export default new Vuex.Store({
   modules: {
     page: mrPageModule,
-    notes: notesModule,
-    diffs: diffsModule,
+    notes: notesModule(),
+    diffs: diffsModule(),
   },
 });

app/assets/javascripts/notes/stores/index.js

 import Vue from 'vue';
 import Vuex from 'vuex';
-import * as actions from './actions';
-import * as getters from './getters';
-import mutations from './mutations';
-import module from './modules';
+import notesModule from './modules';
 Vue.use(Vuex);
 export default () =>
-  new Vuex.Store({
-    state: module.state,
-    actions,
-    getters,
-    mutations,
-  });
+  new Vuex.Store(notesModule());

app/assets/javascripts/notes/stores/modules/index.js

@@ -2,7 +2,7 @@ import * as actions from '../actions';
 import * as getters from '../getters';
 import mutations from '../mutations';
-export default {
+export default () => ({
   state: {
     discussions: [],
     targetNoteHash: null,
@@ -24,4 +24,4 @@ export default {
   actions,
   getters,
   mutations,
-};
+});

spec/javascripts/diffs/components/app_spec.js

-// TODO: https://gitlab.com/gitlab-org/gitlab-ce/issues/48034
+import Vue from 'vue';
+import { mountComponentWithStore } from 'spec/helpers/vue_mount_component_helper';
+import { TEST_HOST } from 'spec/test_constants';
+import App from '~/diffs/components/app.vue';
+import createDiffsStore from '../create_diffs_store';
+
+describe('diffs/components/app', () => {
+  const oldMrTabs = window.mrTabs;
+  const Component = Vue.extend(App);
+
+  let vm;
+
+  beforeEach(() => {
+    // setup globals (needed for component to mount :/)
+    window.mrTabs = jasmine.createSpyObj('mrTabs', ['resetViewContainer']);
+
+    // setup component
+    const store = createDiffsStore();
+    store.state.diffs.isLoading = false;
+
+    vm = mountComponentWithStore(Component, {
+      store,
+      props: {
+        endpoint: `${TEST_HOST}/diff/endpoint`,
+        projectPath: 'namespace/project',
+        currentUser: {},
+      },
+    });
+  });
+
+  afterEach(() => {
+    // reset globals
+    window.mrTabs = oldMrTabs;
+
+    // reset component
+    vm.$destroy();
+  });
+
+  it('shows comments message, with commit', done => {
+    vm.$store.state.diffs.commit = {};
+
+    vm.$nextTick()
+      .then(() => {
+        expect(vm.$el).toContainText('Only comments from the following commit are shown below');
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  it('shows comments message, with old mergeRequestDiff', done => {
+    vm.$store.state.diffs.mergeRequestDiff = { latest: false };
+
+    vm.$nextTick()
+      .then(() => {
+        expect(vm.$el).toContainText("Not all comments are displayed because you're viewing an old version of the diff.");
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+
+  it('shows comments message, with startVersion', done => {
+    vm.$store.state.diffs.startVersion = 'test';
+
+    vm.$nextTick()
+      .then(() => {
+        expect(vm.$el).toContainText("Not all comments are displayed because you're comparing two versions of the diff.");
+      })
+      .then(done)
+      .catch(done.fail);
+  });
+});

spec/javascripts/diffs/components/changed_files_spec.js

@@ -8,7 +8,7 @@ describe('ChangedFiles', () => {
   const Component = Vue.extend(changedFiles);
   const store = new Vuex.Store({
     modules: {
-      diffs: diffsModule,
+      diffs: diffsModule(),
     },
   });

spec/javascripts/diffs/components/diff_file_header_spec.js

@@ -16,8 +16,8 @@ describe('diff_file_header', () => {
   const store = new Vuex.Store({
     modules: {
-      diffs: diffsModule,
-      notes: notesModule,
+      diffs: diffsModule(),
+      notes: notesModule(),
     },
   });
@@ -450,13 +450,14 @@ describe('diff_file_header', () => {
           propsCopy.diffFile.deletedFile = true;
           const discussionGetter = () => [diffDiscussionMock];
-          notesModule.getters.discussions = discussionGetter;
+          const notesModuleMock = notesModule();
+          notesModuleMock.getters.discussions = discussionGetter;
           vm = mountComponentWithStore(Component, {
             props: propsCopy,
             store: new Vuex.Store({
               modules: {
-                diffs: diffsModule,
-                notes: notesModule,
+                diffs: diffsModule(),
+                notes: notesModuleMock,
               },
             }),
           });

spec/javascripts/diffs/create_diffs_store.js

+import Vue from 'vue';
+import Vuex from 'vuex';
+import diffsModule from '~/diffs/store/modules';
+import notesModule from '~/notes/stores/modules';
+
+Vue.use(Vuex);
+
+export default function createDiffsStore() {
+  return new Vuex.Store({
+    modules: {
+      diffs: diffsModule(),
+      notes: notesModule(),
+    },
+  });
+}