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diff --git a/spec/javascripts/ide/components/ide_review_spec.js b/spec/javascripts/ide/components/ide_review_spec.js
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index 00000000000..b9ee22b7c1a
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+++ b/spec/javascripts/ide/components/ide_review_spec.js
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+import Vue from 'vue';
+import IdeReview from '~/ide/components/ide_review.vue';
+import store from '~/ide/stores';
+import { createComponentWithStore } from '../../helpers/vue_mount_component_helper';
+import { trimText } from '../../helpers/vue_component_helper';
+import { resetStore, file } from '../helpers';
+import { projectData } from '../mock_data';
+
+describe('IDE review mode', () => {
+  const Component = Vue.extend(IdeReview);
+  let vm;
+
+  beforeEach(() => {
+    store.state.currentProjectId = 'abcproject';
+    store.state.currentBranchId = 'master';
+    store.state.projects.abcproject = Object.assign({}, projectData);
+    Vue.set(store.state.trees, 'abcproject/master', {
+      tree: [file('fileName')],
+      loading: false,
+    });
+
+    vm = createComponentWithStore(Component, store).$mount();
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+
+    resetStore(vm.$store);
+  });
+
+  it('renders list of files', () => {
+    expect(vm.$el.textContent).toContain('fileName');
+  });
+
+  describe('merge request', () => {
+    beforeEach(done => {
+      store.state.currentMergeRequestId = '1';
+      store.state.projects.abcproject.mergeRequests['1'] = {
+        iid: 123,
+        web_url: 'testing123',
+      };
+
+      vm.$nextTick(done);
+    });
+
+    it('renders edit dropdown', () => {
+      expect(vm.$el.querySelector('.btn')).not.toBe(null);
+    });
+
+    it('renders merge request link & IID', () => {
+      const link = vm.$el.querySelector('.ide-review-sub-header');
+
+      expect(link.querySelector('a').getAttribute('href')).toBe('testing123');
+      expect(trimText(link.textContent)).toBe('Merge request (!123)');
+    });
+
+    it('changes text to latest changes when viewer is not mrdiff', done => {
+      store.state.viewer = 'diff';
+
+      vm.$nextTick(() => {
+        expect(trimText(vm.$el.querySelector('.ide-review-sub-header').textContent)).toBe(
+          'Latest changes',
+        );
+
+        done();
+      });
+    });
+  });
+});