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diff --git a/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js
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+++ b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js
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+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import VueApollo from 'vue-apollo';
+import createMockApollo from 'helpers/mock_apollo_helper';
+import waitForPromises from 'helpers/wait_for_promises';
+import createFlash from '~/flash';
+import SidebarConfidentialityContent from '~/sidebar/components/confidential/sidebar_confidentiality_content.vue';
+import SidebarConfidentialityForm from '~/sidebar/components/confidential/sidebar_confidentiality_form.vue';
+import SidebarConfidentialityWidget, {
+  confidentialWidget,
+} from '~/sidebar/components/confidential/sidebar_confidentiality_widget.vue';
+import SidebarEditableItem from '~/sidebar/components/sidebar_editable_item.vue';
+import issueConfidentialQuery from '~/sidebar/queries/issue_confidential.query.graphql';
+import { issueConfidentialityResponse } from '../../mock_data';
+
+jest.mock('~/flash');
+
+const localVue = createLocalVue();
+localVue.use(VueApollo);
+
+describe('Sidebar Confidentiality Widget', () => {
+  let wrapper;
+  let fakeApollo;
+
+  const findEditableItem = () => wrapper.findComponent(SidebarEditableItem);
+  const findConfidentialityForm = () => wrapper.findComponent(SidebarConfidentialityForm);
+  const findConfidentialityContent = () => wrapper.findComponent(SidebarConfidentialityContent);
+
+  const createComponent = ({
+    confidentialQueryHandler = jest.fn().mockResolvedValue(issueConfidentialityResponse()),
+  } = {}) => {
+    fakeApollo = createMockApollo([[issueConfidentialQuery, confidentialQueryHandler]]);
+
+    wrapper = shallowMount(SidebarConfidentialityWidget, {
+      localVue,
+      apolloProvider: fakeApollo,
+      provide: {
+        fullPath: 'group/project',
+        iid: '1',
+        canUpdate: true,
+      },
+      propsData: {
+        issuableType: 'issue',
+      },
+      stubs: {
+        SidebarEditableItem,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+    fakeApollo = null;
+  });
+
+  it('passes a `loading` prop as true to editable item when query is loading', () => {
+    createComponent();
+
+    expect(findEditableItem().props('loading')).toBe(true);
+  });
+
+  it('exposes a method via external observable', () => {
+    createComponent();
+
+    expect(confidentialWidget.setConfidentiality).toEqual(wrapper.vm.setConfidentiality);
+  });
+
+  describe('when issue is not confidential', () => {
+    beforeEach(async () => {
+      createComponent();
+      await waitForPromises();
+    });
+
+    it('passes a `loading` prop as false to editable item', () => {
+      expect(findEditableItem().props('loading')).toBe(false);
+    });
+
+    it('passes false to `confidential` prop of child components', () => {
+      expect(findConfidentialityForm().props('confidential')).toBe(false);
+      expect(findConfidentialityContent().props('confidential')).toBe(false);
+    });
+
+    it('changes confidentiality to true after setConfidentiality is called', async () => {
+      confidentialWidget.setConfidentiality();
+      await nextTick();
+      expect(findConfidentialityForm().props('confidential')).toBe(true);
+      expect(findConfidentialityContent().props('confidential')).toBe(true);
+    });
+
+    it('emits `confidentialityUpdated` event with a `false` payload', () => {
+      expect(wrapper.emitted('confidentialityUpdated')).toEqual([[false]]);
+    });
+  });
+
+  describe('when issue is confidential', () => {
+    beforeEach(async () => {
+      createComponent({
+        confidentialQueryHandler: jest.fn().mockResolvedValue(issueConfidentialityResponse(true)),
+      });
+      await waitForPromises();
+    });
+
+    it('passes a `loading` prop as false to editable item', () => {
+      expect(findEditableItem().props('loading')).toBe(false);
+    });
+
+    it('passes false to `confidential` prop of child components', () => {
+      expect(findConfidentialityForm().props('confidential')).toBe(true);
+      expect(findConfidentialityContent().props('confidential')).toBe(true);
+    });
+
+    it('changes confidentiality to false after setConfidentiality is called', async () => {
+      confidentialWidget.setConfidentiality();
+      await nextTick();
+      expect(findConfidentialityForm().props('confidential')).toBe(false);
+      expect(findConfidentialityContent().props('confidential')).toBe(false);
+    });
+
+    it('emits `confidentialityUpdated` event with a `true` payload', () => {
+      expect(wrapper.emitted('confidentialityUpdated')).toEqual([[true]]);
+    });
+  });
+
+  it('displays a flash message when query is rejected', async () => {
+    createComponent({
+      confidentialQueryHandler: jest.fn().mockRejectedValue('Houston, we have a problem'),
+    });
+    await waitForPromises();
+
+    expect(createFlash).toHaveBeenCalled();
+  });
+
+  it('closes the form and dispatches an event when `closeForm` is emitted', async () => {
+    createComponent();
+    const el = wrapper.vm.$el;
+    jest.spyOn(el, 'dispatchEvent');
+
+    await waitForPromises();
+    wrapper.vm.$refs.editable.expand();
+    await nextTick();
+
+    expect(findConfidentialityForm().isVisible()).toBe(true);
+
+    findConfidentialityForm().vm.$emit('closeForm');
+    await nextTick();
+    expect(findConfidentialityForm().isVisible()).toBe(false);
+
+    expect(el.dispatchEvent).toHaveBeenCalled();
+    expect(wrapper.emitted('closeForm')).toHaveLength(1);
+  });
+
+  it('emits `expandSidebar` event when it is emitted from child component', async () => {
+    createComponent();
+    await waitForPromises();
+    findConfidentialityContent().vm.$emit('expandSidebar');
+
+    expect(wrapper.emitted('expandSidebar')).toHaveLength(1);
+  });
+});