Add latest changes from gitlab-org/gitlab@13-11-stable-eev13.11.0-rc43

12 files changed, 1019 insertions, 67 deletions

diff --git a/spec/frontend/sidebar/assignees_realtime_spec.js b/spec/frontend/sidebar/assignees_realtime_spec.js
index 0fab6a29f71..f0a6fa40d67 100644
--- a/spec/frontend/sidebar/assignees_realtime_spec.js
+++ b/spec/frontend/sidebar/assignees_realtime_spec.js
@@ -1,7 +1,7 @@
 import ActionCable from '@rails/actioncable';
 import { shallowMount } from '@vue/test-utils';
-import query from '~/issuable_sidebar/queries/issue_sidebar.query.graphql';
 import AssigneesRealtime from '~/sidebar/components/assignees/assignees_realtime.vue';
+import { assigneesQueries } from '~/sidebar/constants';
 import SidebarMediator from '~/sidebar/sidebar_mediator';
 import Mock from './mock_data';
 
@@ -18,18 +18,19 @@ describe('Assignees Realtime', () => {
   let wrapper;
   let mediator;
 
-  const createComponent = () => {
+  const createComponent = (issuableType = 'issue') => {
     wrapper = shallowMount(AssigneesRealtime, {
       propsData: {
         issuableIid: '1',
         mediator,
         projectPath: 'path/to/project',
+        issuableType,
       },
       mocks: {
         $apollo: {
-          query,
+          query: assigneesQueries[issuableType].query,
           queries: {
-            project: {
+            workspace: {
               refetch: jest.fn(),
             },
           },
@@ -51,8 +52,8 @@ describe('Assignees Realtime', () => {
   describe('when handleFetchResult is called from smart query', () => {
     it('sets assignees to the store', () => {
       const data = {
-        project: {
-          issue: {
+        workspace: {
+          issuable: {
             assignees: {
               nodes: [{ id: 'gid://gitlab/Environments/123', avatarUrl: 'url' }],
             },
@@ -95,7 +96,7 @@ describe('Assignees Realtime', () => {
       wrapper.vm.received({ event: 'updated' });
 
       return wrapper.vm.$nextTick().then(() => {
-        expect(wrapper.vm.$apollo.queries.project.refetch).toHaveBeenCalledTimes(1);
+        expect(wrapper.vm.$apollo.queries.workspace.refetch).toHaveBeenCalledTimes(1);
       });
     });
   });
diff --git a/spec/frontend/sidebar/components/assignees/sidebar_assignees_widget_spec.js b/spec/frontend/sidebar/components/assignees/sidebar_assignees_widget_spec.js
new file mode 100644
index 00000000000..824f6d49c65
--- /dev/null
+++ b/spec/frontend/sidebar/components/assignees/sidebar_assignees_widget_spec.js
@@ -0,0 +1,558 @@
+import { GlSearchBoxByType, GlDropdown } from '@gitlab/ui';
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { cloneDeep } from 'lodash';
+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 searchUsersQuery from '~/graphql_shared/queries/users_search.query.graphql';
+import { IssuableType } from '~/issue_show/constants';
+import SidebarAssigneesRealtime from '~/sidebar/components/assignees/assignees_realtime.vue';
+import IssuableAssignees from '~/sidebar/components/assignees/issuable_assignees.vue';
+import SidebarAssigneesWidget from '~/sidebar/components/assignees/sidebar_assignees_widget.vue';
+import SidebarInviteMembers from '~/sidebar/components/assignees/sidebar_invite_members.vue';
+import SidebarEditableItem from '~/sidebar/components/sidebar_editable_item.vue';
+import { ASSIGNEES_DEBOUNCE_DELAY } from '~/sidebar/constants';
+import MultiSelectDropdown from '~/vue_shared/components/sidebar/multiselect_dropdown.vue';
+import getIssueParticipantsQuery from '~/vue_shared/components/sidebar/queries/get_issue_participants.query.graphql';
+import updateIssueAssigneesMutation from '~/vue_shared/components/sidebar/queries/update_issue_assignees.mutation.graphql';
+import {
+  issuableQueryResponse,
+  searchQueryResponse,
+  updateIssueAssigneesMutationResponse,
+} from '../../mock_data';
+
+jest.mock('~/flash');
+
+const updateIssueAssigneesMutationSuccess = jest
+  .fn()
+  .mockResolvedValue(updateIssueAssigneesMutationResponse);
+const mockError = jest.fn().mockRejectedValue('Error!');
+
+const localVue = createLocalVue();
+localVue.use(VueApollo);
+
+const initialAssignees = [
+  {
+    id: 'some-user',
+    avatarUrl: 'some-user-avatar',
+    name: 'test',
+    username: 'test',
+    webUrl: '/test',
+  },
+];
+
+describe('Sidebar assignees widget', () => {
+  let wrapper;
+  let fakeApollo;
+
+  const findAssignees = () => wrapper.findComponent(IssuableAssignees);
+  const findRealtimeAssignees = () => wrapper.findComponent(SidebarAssigneesRealtime);
+  const findEditableItem = () => wrapper.findComponent(SidebarEditableItem);
+  const findDropdown = () => wrapper.findComponent(MultiSelectDropdown);
+  const findInviteMembersLink = () => wrapper.findComponent(SidebarInviteMembers);
+  const findSearchField = () => wrapper.findComponent(GlSearchBoxByType);
+
+  const findParticipantsLoading = () => wrapper.find('[data-testid="loading-participants"]');
+  const findSelectedParticipants = () => wrapper.findAll('[data-testid="selected-participant"]');
+  const findUnselectedParticipants = () =>
+    wrapper.findAll('[data-testid="unselected-participant"]');
+  const findCurrentUser = () => wrapper.findAll('[data-testid="current-user"]');
+  const findUnassignLink = () => wrapper.find('[data-testid="unassign"]');
+  const findEmptySearchResults = () => wrapper.find('[data-testid="empty-results"]');
+
+  const expandDropdown = () => wrapper.vm.$refs.toggle.expand();
+
+  const createComponent = ({
+    search = '',
+    issuableQueryHandler = jest.fn().mockResolvedValue(issuableQueryResponse),
+    searchQueryHandler = jest.fn().mockResolvedValue(searchQueryResponse),
+    updateIssueAssigneesMutationHandler = updateIssueAssigneesMutationSuccess,
+    props = {},
+    provide = {},
+  } = {}) => {
+    fakeApollo = createMockApollo([
+      [getIssueParticipantsQuery, issuableQueryHandler],
+      [searchUsersQuery, searchQueryHandler],
+      [updateIssueAssigneesMutation, updateIssueAssigneesMutationHandler],
+    ]);
+    wrapper = shallowMount(SidebarAssigneesWidget, {
+      localVue,
+      apolloProvider: fakeApollo,
+      propsData: {
+        iid: '1',
+        fullPath: '/mygroup/myProject',
+        ...props,
+      },
+      data() {
+        return {
+          search,
+          selected: [],
+        };
+      },
+      provide: {
+        canUpdate: true,
+        rootPath: '/',
+        ...provide,
+      },
+      stubs: {
+        SidebarEditableItem,
+        MultiSelectDropdown,
+        GlSearchBoxByType,
+        GlDropdown,
+      },
+    });
+  };
+
+  beforeEach(() => {
+    gon.current_username = 'root';
+    gon.current_user_fullname = 'Administrator';
+    gon.current_user_avatar_url = '/root';
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+    fakeApollo = null;
+    delete gon.current_username;
+  });
+
+  describe('with passed initial assignees', () => {
+    it('passes `initialLoading` as false to editable item', () => {
+      createComponent({
+        props: {
+          initialAssignees,
+        },
+      });
+
+      expect(findEditableItem().props('initialLoading')).toBe(false);
+    });
+
+    it('renders an initial assignees list with initialAssignees prop', () => {
+      createComponent({
+        props: {
+          initialAssignees,
+        },
+      });
+
+      expect(findAssignees().props('users')).toEqual(initialAssignees);
+    });
+
+    it('renders a collapsible item title calculated with initial assignees length', () => {
+      createComponent({
+        props: {
+          initialAssignees,
+        },
+      });
+
+      expect(findEditableItem().props('title')).toBe('Assignee');
+    });
+
+    describe('when expanded', () => {
+      it('renders a loading spinner if participants are loading', () => {
+        createComponent({
+          props: {
+            initialAssignees,
+          },
+        });
+        expandDropdown();
+
+        expect(findParticipantsLoading().exists()).toBe(true);
+      });
+    });
+  });
+
+  describe('without passed initial assignees', () => {
+    it('passes `initialLoading` as true to editable item', () => {
+      createComponent();
+
+      expect(findEditableItem().props('initialLoading')).toBe(true);
+    });
+
+    it('renders assignees list from API response when resolved', async () => {
+      createComponent();
+      await waitForPromises();
+
+      expect(findAssignees().props('users')).toEqual(
+        issuableQueryResponse.data.workspace.issuable.assignees.nodes,
+      );
+    });
+
+    it('renders an error when issuable query is rejected', async () => {
+      createComponent({
+        issuableQueryHandler: mockError,
+      });
+      await waitForPromises();
+
+      expect(createFlash).toHaveBeenCalledWith({
+        message: 'An error occurred while fetching participants.',
+      });
+    });
+
+    it('assigns current user when clicking `Assign self`', async () => {
+      createComponent();
+
+      await waitForPromises();
+
+      findAssignees().vm.$emit('assign-self');
+
+      expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+        assigneeUsernames: 'root',
+        fullPath: '/mygroup/myProject',
+        iid: '1',
+      });
+
+      await waitForPromises();
+
+      expect(
+        findAssignees()
+          .props('users')
+          .some((user) => user.username === 'root'),
+      ).toBe(true);
+    });
+
+    it('emits an event with assignees list on successful mutation', async () => {
+      createComponent();
+
+      await waitForPromises();
+
+      findAssignees().vm.$emit('assign-self');
+
+      expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+        assigneeUsernames: 'root',
+        fullPath: '/mygroup/myProject',
+        iid: '1',
+      });
+
+      await waitForPromises();
+
+      expect(wrapper.emitted('assignees-updated')).toEqual([
+        [
+          [
+            {
+              __typename: 'User',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon',
+              id: 'gid://gitlab/User/1',
+              name: 'Administrator',
+              username: 'root',
+              webUrl: '/root',
+              status: null,
+            },
+          ],
+        ],
+      ]);
+    });
+
+    it('renders current user if they are not in participants or assignees', async () => {
+      gon.current_username = 'random';
+      gon.current_user_fullname = 'Mr Random';
+      gon.current_user_avatar_url = '/random';
+
+      createComponent();
+      await waitForPromises();
+      expandDropdown();
+
+      expect(findCurrentUser().exists()).toBe(true);
+    });
+
+    describe('when expanded', () => {
+      beforeEach(async () => {
+        createComponent();
+        await waitForPromises();
+        expandDropdown();
+      });
+
+      it('collapses the widget on multiselect dropdown toggle event', async () => {
+        findDropdown().vm.$emit('toggle');
+        await nextTick();
+        expect(findDropdown().isVisible()).toBe(false);
+      });
+
+      it('renders participants list with correct amount of selected and unselected', async () => {
+        expect(findSelectedParticipants()).toHaveLength(1);
+        expect(findUnselectedParticipants()).toHaveLength(2);
+      });
+
+      it('does not render current user if they are in participants', () => {
+        expect(findCurrentUser().exists()).toBe(false);
+      });
+
+      it('unassigns all participants when clicking on `Unassign`', () => {
+        findUnassignLink().vm.$emit('click');
+        findEditableItem().vm.$emit('close');
+
+        expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+          assigneeUsernames: [],
+          fullPath: '/mygroup/myProject',
+          iid: '1',
+        });
+      });
+    });
+
+    describe('when multiselect is disabled', () => {
+      beforeEach(async () => {
+        createComponent({ props: { multipleAssignees: false } });
+        await waitForPromises();
+        expandDropdown();
+      });
+
+      it('adds a single assignee when clicking on unselected user', async () => {
+        findUnselectedParticipants().at(0).vm.$emit('click');
+
+        expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+          assigneeUsernames: ['root'],
+          fullPath: '/mygroup/myProject',
+          iid: '1',
+        });
+      });
+
+      it('removes an assignee when clicking on selected user', () => {
+        findSelectedParticipants().at(0).vm.$emit('click', new Event('click'));
+
+        expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+          assigneeUsernames: [],
+          fullPath: '/mygroup/myProject',
+          iid: '1',
+        });
+      });
+    });
+
+    describe('when multiselect is enabled', () => {
+      beforeEach(async () => {
+        createComponent({ props: { multipleAssignees: true } });
+        await waitForPromises();
+        expandDropdown();
+      });
+
+      it('adds a few assignees after clicking on unselected users and closing a dropdown', () => {
+        findUnselectedParticipants().at(0).vm.$emit('click');
+        findUnselectedParticipants().at(1).vm.$emit('click');
+        findEditableItem().vm.$emit('close');
+
+        expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+          assigneeUsernames: ['francina.skiles', 'root', 'johndoe'],
+          fullPath: '/mygroup/myProject',
+          iid: '1',
+        });
+      });
+
+      it('removes an assignee when clicking on selected user and then closing dropdown', () => {
+        findSelectedParticipants().at(0).vm.$emit('click', new Event('click'));
+
+        findEditableItem().vm.$emit('close');
+
+        expect(updateIssueAssigneesMutationSuccess).toHaveBeenCalledWith({
+          assigneeUsernames: [],
+          fullPath: '/mygroup/myProject',
+          iid: '1',
+        });
+      });
+
+      it('does not call a mutation when clicking on participants until dropdown is closed', () => {
+        findUnselectedParticipants().at(0).vm.$emit('click');
+        findSelectedParticipants().at(0).vm.$emit('click', new Event('click'));
+
+        expect(updateIssueAssigneesMutationSuccess).not.toHaveBeenCalled();
+      });
+    });
+
+    it('shows an error if update assignees mutation is rejected', async () => {
+      createComponent({ updateIssueAssigneesMutationHandler: mockError });
+      await waitForPromises();
+      expandDropdown();
+
+      findUnassignLink().vm.$emit('click');
+      findEditableItem().vm.$emit('close');
+
+      await waitForPromises();
+
+      expect(createFlash).toHaveBeenCalledWith({
+        message: 'An error occurred while updating assignees.',
+      });
+    });
+
+    describe('when searching', () => {
+      it('does not show loading spinner when debounce timer is still running', async () => {
+        createComponent({ search: 'roo' });
+        await waitForPromises();
+        expandDropdown();
+
+        expect(findParticipantsLoading().exists()).toBe(false);
+      });
+
+      it('shows loading spinner when searching for users', async () => {
+        createComponent({ search: 'roo' });
+        await waitForPromises();
+        expandDropdown();
+        jest.advanceTimersByTime(ASSIGNEES_DEBOUNCE_DELAY);
+        await nextTick();
+
+        expect(findParticipantsLoading().exists()).toBe(true);
+      });
+
+      it('renders a list of found users and external participants matching search term', async () => {
+        const responseCopy = cloneDeep(issuableQueryResponse);
+        responseCopy.data.workspace.issuable.participants.nodes.push({
+          id: 'gid://gitlab/User/5',
+          avatarUrl: '/someavatar',
+          name: 'Roodie',
+          username: 'roodie',
+          webUrl: '/roodie',
+          status: null,
+        });
+
+        const issuableQueryHandler = jest.fn().mockResolvedValue(responseCopy);
+
+        createComponent({ issuableQueryHandler });
+        await waitForPromises();
+        expandDropdown();
+
+        findSearchField().vm.$emit('input', 'roo');
+        await nextTick();
+
+        jest.advanceTimersByTime(ASSIGNEES_DEBOUNCE_DELAY);
+        await nextTick();
+        await waitForPromises();
+
+        expect(findUnselectedParticipants()).toHaveLength(3);
+      });
+
+      it('renders a list of found users only if no external participants match search term', async () => {
+        createComponent({ search: 'roo' });
+        await waitForPromises();
+        expandDropdown();
+        jest.advanceTimersByTime(250);
+        await nextTick();
+        await waitForPromises();
+
+        expect(findUnselectedParticipants()).toHaveLength(2);
+      });
+
+      it('shows a message about no matches if search returned an empty list', async () => {
+        const responseCopy = cloneDeep(searchQueryResponse);
+        responseCopy.data.workspace.users.nodes = [];
+
+        createComponent({
+          search: 'roo',
+          searchQueryHandler: jest.fn().mockResolvedValue(responseCopy),
+        });
+        await waitForPromises();
+        expandDropdown();
+        jest.advanceTimersByTime(ASSIGNEES_DEBOUNCE_DELAY);
+        await nextTick();
+        await waitForPromises();
+
+        expect(findUnselectedParticipants()).toHaveLength(0);
+        expect(findEmptySearchResults().exists()).toBe(true);
+      });
+
+      it('shows an error if search query was rejected', async () => {
+        createComponent({ search: 'roo', searchQueryHandler: mockError });
+        await waitForPromises();
+        expandDropdown();
+        jest.advanceTimersByTime(250);
+        await nextTick();
+        await waitForPromises();
+
+        expect(createFlash).toHaveBeenCalledWith({
+          message: 'An error occurred while searching users.',
+        });
+      });
+    });
+  });
+
+  describe('when user is not signed in', () => {
+    beforeEach(() => {
+      gon.current_username = undefined;
+      createComponent();
+    });
+
+    it('does not show current user in the dropdown', () => {
+      expandDropdown();
+      expect(findCurrentUser().exists()).toBe(false);
+    });
+
+    it('passes signedIn prop as false to IssuableAssignees', () => {
+      expect(findAssignees().props('signedIn')).toBe(false);
+    });
+  });
+
+  it('when realtime feature flag is disabled', async () => {
+    createComponent();
+    await waitForPromises();
+    expect(findRealtimeAssignees().exists()).toBe(false);
+  });
+
+  it('when realtime feature flag is enabled', async () => {
+    createComponent({
+      provide: {
+        glFeatures: {
+          realTimeIssueSidebar: true,
+        },
+      },
+    });
+    await waitForPromises();
+    expect(findRealtimeAssignees().exists()).toBe(true);
+  });
+
+  describe('when making changes to participants list', () => {
+    beforeEach(async () => {
+      createComponent();
+    });
+
+    it('passes falsy `isDirty` prop to editable item if no changes to selected users were made', () => {
+      expandDropdown();
+      expect(findEditableItem().props('isDirty')).toBe(false);
+    });
+
+    it('passes truthy `isDirty` prop if selected users list was changed', async () => {
+      expandDropdown();
+      expect(findEditableItem().props('isDirty')).toBe(false);
+      findUnselectedParticipants().at(0).vm.$emit('click');
+      await nextTick();
+      expect(findEditableItem().props('isDirty')).toBe(true);
+    });
+
+    it('passes falsy `isDirty` prop after dropdown is closed', async () => {
+      expandDropdown();
+      findUnselectedParticipants().at(0).vm.$emit('click');
+      findEditableItem().vm.$emit('close');
+      await waitForPromises();
+      expect(findEditableItem().props('isDirty')).toBe(false);
+    });
+  });
+
+  it('does not render invite members link on non-issue sidebar', async () => {
+    createComponent({ props: { issuableType: IssuableType.MergeRequest } });
+    await waitForPromises();
+    expect(findInviteMembersLink().exists()).toBe(false);
+  });
+
+  it('does not render invite members link if `directlyInviteMembers` and `indirectlyInviteMembers` were not passed', async () => {
+    createComponent();
+    await waitForPromises();
+    expect(findInviteMembersLink().exists()).toBe(false);
+  });
+
+  it('renders invite members link if `directlyInviteMembers` is true', async () => {
+    createComponent({
+      provide: {
+        directlyInviteMembers: true,
+      },
+    });
+    await waitForPromises();
+    expect(findInviteMembersLink().exists()).toBe(true);
+  });
+
+  it('renders invite members link if `indirectlyInviteMembers` is true', async () => {
+    createComponent({
+      provide: {
+        indirectlyInviteMembers: true,
+      },
+    });
+    await waitForPromises();
+    expect(findInviteMembersLink().exists()).toBe(true);
+  });
+});
diff --git a/spec/frontend/sidebar/components/assignees/sidebar_editable_item_spec.js b/spec/frontend/sidebar/components/assignees/sidebar_editable_item_spec.js
index 4ee12838491..84b192aaf41 100644
--- a/spec/frontend/sidebar/components/assignees/sidebar_editable_item_spec.js
+++ b/spec/frontend/sidebar/components/assignees/sidebar_editable_item_spec.js
@@ -5,7 +5,7 @@ import SidebarEditableItem from '~/sidebar/components/sidebar_editable_item.vue'
 describe('boards sidebar remove issue', () => {
   let wrapper;
 
-  const findLoader = () => wrapper.find(GlLoadingIcon);
+  const findLoader = () => wrapper.findComponent(GlLoadingIcon);
   const findEditButton = () => wrapper.find('[data-testid="edit-button"]');
   const findTitle = () => wrapper.find('[data-testid="title"]');
   const findCollapsed = () => wrapper.find('[data-testid="collapsed-content"]');
@@ -117,4 +117,35 @@ describe('boards sidebar remove issue', () => {
 
     expect(wrapper.emitted().close).toBeUndefined();
   });
+
+  it('renders `Edit` test when passed `isDirty` prop is false', () => {
+    createComponent({ props: { isDirty: false }, canUpdate: true });
+
+    expect(findEditButton().text()).toBe('Edit');
+  });
+
+  it('renders `Apply` test when passed `isDirty` prop is true', () => {
+    createComponent({ props: { isDirty: true }, canUpdate: true });
+
+    expect(findEditButton().text()).toBe('Apply');
+  });
+
+  describe('when initial loading is true', () => {
+    beforeEach(() => {
+      createComponent({ props: { initialLoading: true } });
+    });
+
+    it('renders loading icon', () => {
+      expect(findLoader().exists()).toBe(true);
+    });
+
+    it('does not render edit button', () => {
+      expect(findEditButton().exists()).toBe(false);
+    });
+
+    it('does not render collapsed and expanded content', () => {
+      expect(findCollapsed().exists()).toBe(false);
+      expect(findExpanded().exists()).toBe(false);
+    });
+  });
 });
diff --git a/spec/frontend/sidebar/components/assignees/sidebar_invite_members_spec.js b/spec/frontend/sidebar/components/assignees/sidebar_invite_members_spec.js
new file mode 100644
index 00000000000..06f7da3d1ab
--- /dev/null
+++ b/spec/frontend/sidebar/components/assignees/sidebar_invite_members_spec.js
@@ -0,0 +1,59 @@
+import { shallowMount } from '@vue/test-utils';
+import InviteMemberModal from '~/invite_member/components/invite_member_modal.vue';
+import InviteMemberTrigger from '~/invite_member/components/invite_member_trigger.vue';
+import InviteMembersTrigger from '~/invite_members/components/invite_members_trigger.vue';
+import SidebarInviteMembers from '~/sidebar/components/assignees/sidebar_invite_members.vue';
+
+const testProjectMembersPath = 'test-path';
+
+describe('Sidebar invite members component', () => {
+  let wrapper;
+
+  const findDirectInviteLink = () => wrapper.findComponent(InviteMembersTrigger);
+  const findIndirectInviteLink = () => wrapper.findComponent(InviteMemberTrigger);
+  const findInviteModal = () => wrapper.findComponent(InviteMemberModal);
+
+  const createComponent = ({ directlyInviteMembers = false } = {}) => {
+    wrapper = shallowMount(SidebarInviteMembers, {
+      provide: {
+        directlyInviteMembers,
+        projectMembersPath: testProjectMembersPath,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('when directly inviting members', () => {
+    beforeEach(() => {
+      createComponent({ directlyInviteMembers: true });
+    });
+
+    it('renders a direct link to project members path', () => {
+      expect(findDirectInviteLink().exists()).toBe(true);
+    });
+
+    it('does not render invite members trigger and modal components', () => {
+      expect(findIndirectInviteLink().exists()).toBe(false);
+      expect(findInviteModal().exists()).toBe(false);
+    });
+  });
+
+  describe('when indirectly inviting members', () => {
+    beforeEach(() => {
+      createComponent();
+    });
+
+    it('does not render a direct link to project members path', () => {
+      expect(findDirectInviteLink().exists()).toBe(false);
+    });
+
+    it('does not render invite members trigger and modal components', () => {
+      expect(findIndirectInviteLink().exists()).toBe(true);
+      expect(findInviteModal().exists()).toBe(true);
+      expect(findInviteModal().props('membersPath')).toBe(testProjectMembersPath);
+    });
+  });
+});
diff --git a/spec/frontend/sidebar/components/assignees/sidebar_participant_spec.js b/spec/frontend/sidebar/components/assignees/sidebar_participant_spec.js
new file mode 100644
index 00000000000..88a5f4ea8b7
--- /dev/null
+++ b/spec/frontend/sidebar/components/assignees/sidebar_participant_spec.js
@@ -0,0 +1,43 @@
+import { GlAvatarLabeled } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import SidebarParticipant from '~/sidebar/components/assignees/sidebar_participant.vue';
+
+const user = {
+  name: 'John Doe',
+  username: 'johndoe',
+  webUrl: '/link',
+  avatarUrl: '/avatar',
+};
+
+describe('Sidebar participant component', () => {
+  let wrapper;
+
+  const findAvatar = () => wrapper.findComponent(GlAvatarLabeled);
+
+  const createComponent = (status = null) => {
+    wrapper = shallowMount(SidebarParticipant, {
+      propsData: {
+        user: {
+          ...user,
+          status,
+        },
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('when user is not busy', () => {
+    createComponent();
+
+    expect(findAvatar().props('label')).toBe(user.name);
+  });
+
+  it('when user is busy', () => {
+    createComponent({ availability: 'BUSY' });
+
+    expect(findAvatar().props('label')).toBe(`${user.name} (Busy)`);
+  });
+});
diff --git a/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_form_spec.js b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_form_spec.js
index d5e6310ed38..28a19fb9df6 100644
--- a/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_form_spec.js
+++ b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_form_spec.js
@@ -20,11 +20,9 @@ describe('Sidebar Confidentiality Form', () => {
     mutate = jest.fn().mockResolvedValue('Success'),
   } = {}) => {
     wrapper = shallowMount(SidebarConfidentialityForm, {
-      provide: {
+      propsData: {
         fullPath: 'group/project',
         iid: '1',
-      },
-      propsData: {
         confidential: false,
         issuableType: 'issue',
         ...props,
diff --git a/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js
index 20a5be9b518..707215d0739 100644
--- a/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js
+++ b/spec/frontend/sidebar/components/confidential/sidebar_confidentiality_widget_spec.js
@@ -35,11 +35,11 @@ describe('Sidebar Confidentiality Widget', () => {
       localVue,
       apolloProvider: fakeApollo,
       provide: {
-        fullPath: 'group/project',
-        iid: '1',
         canUpdate: true,
       },
       propsData: {
+        fullPath: 'group/project',
+        iid: '1',
         issuableType: 'issue',
       },
       stubs: {
diff --git a/spec/frontend/sidebar/components/copy_email_to_clipboard_spec.js b/spec/frontend/sidebar/components/copy_email_to_clipboard_spec.js
index 704847f65bf..699b2bbd0b1 100644
--- a/spec/frontend/sidebar/components/copy_email_to_clipboard_spec.js
+++ b/spec/frontend/sidebar/components/copy_email_to_clipboard_spec.js
@@ -1,22 +1,17 @@
-import { getByText } from '@testing-library/dom';
-import { mount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import CopyEmailToClipboard from '~/sidebar/components/copy_email_to_clipboard.vue';
-import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
+import CopyableField from '~/vue_shared/components/sidebar/copyable_field.vue';
 
 describe('CopyEmailToClipboard component', () => {
-  const sampleEmail = 'sample+email@test.com';
+  const mockIssueEmailAddress = 'sample+email@test.com';
 
-  const wrapper = mount(CopyEmailToClipboard, {
+  const wrapper = shallowMount(CopyEmailToClipboard, {
     propsData: {
-      copyText: sampleEmail,
+      issueEmailAddress: mockIssueEmailAddress,
     },
   });
 
-  it('renders the Issue email text with the forwardable email', () => {
-    expect(getByText(wrapper.element, `Issue email: ${sampleEmail}`)).not.toBeNull();
-  });
-
-  it('finds ClipboardButton with the correct props', () => {
-    expect(wrapper.find(ClipboardButton).props('text')).toBe(sampleEmail);
+  it('sets CopyableField `value` prop to issueEmailAddress', () => {
+    expect(wrapper.find(CopyableField).props('value')).toBe(mockIssueEmailAddress);
   });
 });
diff --git a/spec/frontend/sidebar/components/due_date/sidebar_due_date_widget_spec.js b/spec/frontend/sidebar/components/due_date/sidebar_due_date_widget_spec.js
new file mode 100644
index 00000000000..f58ceb0f1be
--- /dev/null
+++ b/spec/frontend/sidebar/components/due_date/sidebar_due_date_widget_spec.js
@@ -0,0 +1,106 @@
+import { shallowMount } from '@vue/test-utils';
+import Vue 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 SidebarDueDateWidget from '~/sidebar/components/due_date/sidebar_due_date_widget.vue';
+import SidebarEditableItem from '~/sidebar/components/sidebar_editable_item.vue';
+import issueDueDateQuery from '~/sidebar/queries/issue_due_date.query.graphql';
+import { issueDueDateResponse } from '../../mock_data';
+
+jest.mock('~/flash');
+
+Vue.use(VueApollo);
+
+describe('Sidebar Due date Widget', () => {
+  let wrapper;
+  let fakeApollo;
+  const date = '2021-04-15';
+
+  const findEditableItem = () => wrapper.findComponent(SidebarEditableItem);
+  const findFormattedDueDate = () => wrapper.find("[data-testid='sidebar-duedate-value']");
+
+  const createComponent = ({
+    dueDateQueryHandler = jest.fn().mockResolvedValue(issueDueDateResponse()),
+  } = {}) => {
+    fakeApollo = createMockApollo([[issueDueDateQuery, dueDateQueryHandler]]);
+
+    wrapper = shallowMount(SidebarDueDateWidget, {
+      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);
+  });
+
+  describe('when issue has no due date', () => {
+    beforeEach(async () => {
+      createComponent({
+        dueDateQueryHandler: jest.fn().mockResolvedValue(issueDueDateResponse(null)),
+      });
+      await waitForPromises();
+    });
+
+    it('passes a `loading` prop as false to editable item', () => {
+      expect(findEditableItem().props('loading')).toBe(false);
+    });
+
+    it('dueDate is null by default', () => {
+      expect(findFormattedDueDate().text()).toBe('None');
+    });
+
+    it('emits `dueDateUpdated` event with a `null` payload', () => {
+      expect(wrapper.emitted('dueDateUpdated')).toEqual([[null]]);
+    });
+  });
+
+  describe('when issue has due date', () => {
+    beforeEach(async () => {
+      createComponent({
+        dueDateQueryHandler: jest.fn().mockResolvedValue(issueDueDateResponse(date)),
+      });
+      await waitForPromises();
+    });
+
+    it('passes a `loading` prop as false to editable item', () => {
+      expect(findEditableItem().props('loading')).toBe(false);
+    });
+
+    it('has dueDate', () => {
+      expect(findFormattedDueDate().text()).toBe('Apr 15, 2021');
+    });
+
+    it('emits `dueDateUpdated` event with the date payload', () => {
+      expect(wrapper.emitted('dueDateUpdated')).toEqual([[date]]);
+    });
+  });
+
+  it('displays a flash message when query is rejected', async () => {
+    createComponent({
+      dueDateQueryHandler: jest.fn().mockRejectedValue('Houston, we have a problem'),
+    });
+    await waitForPromises();
+
+    expect(createFlash).toHaveBeenCalled();
+  });
+});
diff --git a/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js b/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js
index 1dbb7702a15..cc428693930 100644
--- a/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js
+++ b/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js
@@ -1,4 +1,3 @@
-import { GlLoadingIcon } from '@gitlab/ui';
 import { shallowMount } from '@vue/test-utils';
 import Vue from 'vue';
 import VueApollo from 'vue-apollo';
@@ -8,18 +7,21 @@ import { IssuableType } from '~/issue_show/constants';
 import SidebarReferenceWidget from '~/sidebar/components/reference/sidebar_reference_widget.vue';
 import issueReferenceQuery from '~/sidebar/queries/issue_reference.query.graphql';
 import mergeRequestReferenceQuery from '~/sidebar/queries/merge_request_reference.query.graphql';
-import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
+import CopyableField from '~/vue_shared/components/sidebar/copyable_field.vue';
 import { issueReferenceResponse } from '../../mock_data';
 
 describe('Sidebar Reference Widget', () => {
   let wrapper;
   let fakeApollo;
-  const referenceText = 'reference';
+
+  const mockReferenceValue = 'reference-1234';
+
+  const findCopyableField = () => wrapper.findComponent(CopyableField);
 
   const createComponent = ({
-    issuableType,
+    issuableType = IssuableType.Issue,
     referenceQuery = issueReferenceQuery,
-    referenceQueryHandler = jest.fn().mockResolvedValue(issueReferenceResponse(referenceText)),
+    referenceQueryHandler = jest.fn().mockResolvedValue(issueReferenceResponse(mockReferenceValue)),
   } = {}) => {
     Vue.use(VueApollo);
 
@@ -39,14 +41,20 @@ describe('Sidebar Reference Widget', () => {
 
   afterEach(() => {
     wrapper.destroy();
-    wrapper = null;
+  });
+
+  describe('when reference is loading', () => {
+    it('sets CopyableField `is-loading` prop to `true`', () => {
+      createComponent({ referenceQueryHandler: jest.fn().mockReturnValue(new Promise(() => {})) });
+      expect(findCopyableField().props('isLoading')).toBe(true);
+    });
   });
 
   describe.each([
     [IssuableType.Issue, issueReferenceQuery],
     [IssuableType.MergeRequest, mergeRequestReferenceQuery],
   ])('when issuableType is %s', (issuableType, referenceQuery) => {
-    it('displays the reference text', async () => {
+    it('sets CopyableField `value` prop to reference value', async () => {
       createComponent({
         issuableType,
         referenceQuery,
@@ -54,40 +62,32 @@ describe('Sidebar Reference Widget', () => {
 
       await waitForPromises();
 
-      expect(wrapper.text()).toContain(referenceText);
+      expect(findCopyableField().props('value')).toBe(mockReferenceValue);
     });
 
-    it('displays loading icon while fetching and hides clipboard icon', async () => {
-      createComponent({
-        issuableType,
-        referenceQuery,
-      });
+    describe('when error occurs', () => {
+      it('calls createFlash with correct parameters', async () => {
+        const mockError = new Error('mayday');
 
-      expect(wrapper.find(GlLoadingIcon).exists()).toBe(true);
-      expect(wrapper.find(ClipboardButton).exists()).toBe(false);
-    });
+        createComponent({
+          issuableType,
+          referenceQuery,
+          referenceQueryHandler: jest.fn().mockRejectedValue(mockError),
+        });
 
-    it('calls createFlash with correct parameters', async () => {
-      const mockError = new Error('mayday');
+        await waitForPromises();
 
-      createComponent({
-        issuableType,
-        referenceQuery,
-        referenceQueryHandler: jest.fn().mockRejectedValue(mockError),
+        const [
+          [
+            {
+              message,
+              error: { networkError },
+            },
+          ],
+        ] = wrapper.emitted('fetch-error');
+        expect(message).toBe('An error occurred while fetching reference');
+        expect(networkError).toEqual(mockError);
       });
-
-      await waitForPromises();
-
-      const [
-        [
-          {
-            message,
-            error: { networkError },
-          },
-        ],
-      ] = wrapper.emitted('fetch-error');
-      expect(message).toBe('An error occurred while fetching reference');
-      expect(networkError).toEqual(mockError);
     });
   });
 });
diff --git a/spec/frontend/sidebar/issuable_assignees_spec.js b/spec/frontend/sidebar/issuable_assignees_spec.js
index af4dc315aad..3563d478f3f 100644
--- a/spec/frontend/sidebar/issuable_assignees_spec.js
+++ b/spec/frontend/sidebar/issuable_assignees_spec.js
@@ -5,12 +5,15 @@ import UncollapsedAssigneeList from '~/sidebar/components/assignees/uncollapsed_
 describe('IssuableAssignees', () => {
   let wrapper;
 
-  const createComponent = (props = { users: [] }) => {
+  const createComponent = (props = {}) => {
     wrapper = shallowMount(IssuableAssignees, {
       provide: {
         rootPath: '',
       },
-      propsData: { ...props },
+      propsData: {
+        users: [],
+        ...props,
+      },
     });
   };
   const findUncollapsedAssigneeList = () => wrapper.find(UncollapsedAssigneeList);
@@ -22,12 +25,14 @@ describe('IssuableAssignees', () => {
   });
 
   describe('when no assignees are present', () => {
-    beforeEach(() => {
-      createComponent();
+    it('renders "None - assign yourself" when user is logged in', () => {
+      createComponent({ signedIn: true });
+      expect(findEmptyAssignee().text()).toBe('None - assign yourself');
     });
 
-    it('renders "None - assign yourself"', () => {
-      expect(findEmptyAssignee().text()).toBe('None - assign yourself');
+    it('renders "None" when user is not logged in', () => {
+      createComponent();
+      expect(findEmptyAssignee().text()).toBe('None');
     });
   });
 
@@ -41,7 +46,7 @@ describe('IssuableAssignees', () => {
 
   describe('when clicking "assign yourself"', () => {
     it('emits "assign-self"', () => {
-      createComponent();
+      createComponent({ signedIn: true });
       wrapper.find('[data-testid="assign-yourself"]').vm.$emit('click');
       expect(wrapper.emitted('assign-self')).toHaveLength(1);
     });
diff --git a/spec/frontend/sidebar/mock_data.js b/spec/frontend/sidebar/mock_data.js
index e751f1239c8..2a4858a6320 100644
--- a/spec/frontend/sidebar/mock_data.js
+++ b/spec/frontend/sidebar/mock_data.js
@@ -233,6 +233,19 @@ export const issueConfidentialityResponse = (confidential = false) => ({
   },
 });
 
+export const issueDueDateResponse = (dueDate = null) => ({
+  data: {
+    workspace: {
+      __typename: 'Project',
+      issuable: {
+        __typename: 'Issue',
+        id: 'gid://gitlab/Issue/4',
+        dueDate,
+      },
+    },
+  },
+});
+
 export const issueReferenceResponse = (reference) => ({
   data: {
     workspace: {
@@ -245,4 +258,147 @@ export const issueReferenceResponse = (reference) => ({
     },
   },
 });
+
+export const issuableQueryResponse = {
+  data: {
+    workspace: {
+      __typename: 'Project',
+      issuable: {
+        __typename: 'Issue',
+        id: 'gid://gitlab/Issue/1',
+        iid: '1',
+        participants: {
+          nodes: [
+            {
+              id: 'gid://gitlab/User/1',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon',
+              name: 'Administrator',
+              username: 'root',
+              webUrl: '/root',
+              status: null,
+            },
+            {
+              id: 'gid://gitlab/User/2',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/a95e5b71488f4b9d69ce5ff58bfd28d6?s=80\u0026d=identicon',
+              name: 'Jacki Kub',
+              username: 'francina.skiles',
+              webUrl: '/franc',
+              status: {
+                availability: 'BUSY',
+              },
+            },
+            {
+              id: 'gid://gitlab/User/3',
+              avatarUrl: '/avatar',
+              name: 'John Doe',
+              username: 'johndoe',
+              webUrl: '/john',
+              status: null,
+            },
+          ],
+        },
+        assignees: {
+          nodes: [
+            {
+              id: 'gid://gitlab/User/2',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/a95e5b71488f4b9d69ce5ff58bfd28d6?s=80\u0026d=identicon',
+              name: 'Jacki Kub',
+              username: 'francina.skiles',
+              webUrl: '/franc',
+              status: null,
+            },
+          ],
+        },
+      },
+    },
+  },
+};
+
+export const searchQueryResponse = {
+  data: {
+    workspace: {
+      __typename: 'Project',
+      users: {
+        nodes: [
+          {
+            user: {
+              id: '1',
+              avatarUrl: '/avatar',
+              name: 'root',
+              username: 'root',
+              webUrl: 'root',
+              status: null,
+            },
+          },
+          {
+            user: {
+              id: '2',
+              avatarUrl: '/avatar2',
+              name: 'rookie',
+              username: 'rookie',
+              webUrl: 'rookie',
+              status: null,
+            },
+          },
+        ],
+      },
+    },
+  },
+};
+
+export const updateIssueAssigneesMutationResponse = {
+  data: {
+    issuableSetAssignees: {
+      issuable: {
+        id: 'gid://gitlab/Issue/1',
+        iid: '1',
+        assignees: {
+          nodes: [
+            {
+              __typename: 'User',
+              id: 'gid://gitlab/User/1',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon',
+              name: 'Administrator',
+              username: 'root',
+              webUrl: '/root',
+              status: null,
+            },
+          ],
+          __typename: 'UserConnection',
+        },
+        participants: {
+          nodes: [
+            {
+              __typename: 'User',
+              id: 'gid://gitlab/User/1',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80\u0026d=identicon',
+              name: 'Administrator',
+              username: 'root',
+              webUrl: '/root',
+              status: null,
+            },
+            {
+              __typename: 'User',
+              id: 'gid://gitlab/User/2',
+              avatarUrl:
+                'https://www.gravatar.com/avatar/a95e5b71488f4b9d69ce5ff58bfd28d6?s=80\u0026d=identicon',
+              name: 'Jacki Kub',
+              username: 'francina.skiles',
+              webUrl: '/franc',
+              status: null,
+            },
+          ],
+          __typename: 'UserConnection',
+        },
+        __typename: 'Issue',
+      },
+    },
+  },
+};
+
 export default mockData;