Add IssuableHeader component

Adds IssuableHeader component to use with
Issuable Show app.

app/assets/javascripts/issuable_show/components/issuable_header.vue

+<script>
+import { GlIcon, GlButton, GlTooltipDirective, GlAvatarLink, GlAvatarLabeled } from '@gitlab/ui';
+
+import { getIdFromGraphQLId } from '~/graphql_shared/utils';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+
+export default {
+  components: {
+    GlIcon,
+    GlButton,
+    GlAvatarLink,
+    GlAvatarLabeled,
+    TimeAgoTooltip,
+  },
+  directives: {
+    GlTooltip: GlTooltipDirective,
+  },
+  props: {
+    createdAt: {
+      type: String,
+      required: true,
+    },
+    author: {
+      type: Object,
+      required: true,
+    },
+    statusBadgeClass: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    statusIcon: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    blocked: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    confidential: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+  computed: {
+    authorId() {
+      return getIdFromGraphQLId(`${this.author.id}`);
+    },
+  },
+  mounted() {
+    this.toggleSidebarButtonEl = document.querySelector('.js-toggle-right-sidebar-button');
+  },
+  methods: {
+    handleRightSidebarToggleClick() {
+      if (this.toggleSidebarButtonEl) {
+        this.toggleSidebarButtonEl.dispatchEvent(new Event('click'));
+      }
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="detail-page-header">
+    <div class="detail-page-header-body">
+      <div data-testid="status" class="issuable-status-box status-box" :class="statusBadgeClass">
+        <gl-icon v-if="statusIcon" :name="statusIcon" class="d-block d-sm-none" />
+        <span class="d-none d-sm-block"><slot name="status-badge"></slot></span>
+      </div>
+      <div class="issuable-meta gl-display-flex gl-align-items-center">
+        <div class="gl-display-inline-block">
+          <div v-if="blocked" data-testid="blocked" class="issuable-warning-icon inline">
+            <gl-icon name="lock" :aria-label="__('Blocked')" />
+          </div>
+          <div v-if="confidential" data-testid="confidential" class="issuable-warning-icon inline">
+            <gl-icon name="eye-slash" :aria-label="__('Confidential')" />
+          </div>
+        </div>
+        <span>
+          {{ __('Opened') }}
+          <time-ago-tooltip data-testid="startTimeItem" :time="createdAt" />
+          {{ __('by') }}
+        </span>
+        <gl-avatar-link
+          data-testid="avatar"
+          :data-user-id="authorId"
+          :data-username="author.username"
+          :data-name="author.name"
+          :href="author.webUrl"
+          target="_blank"
+          class="js-user-link gl-ml-2"
+        >
+          <gl-avatar-labeled
+            :size="24"
+            :src="author.avatarUrl"
+            :label="author.name"
+            class="d-none d-sm-inline-flex gl-ml-1"
+          />
+          <strong class="author d-sm-none d-inline">@{{ author.username }}</strong>
+        </gl-avatar-link>
+      </div>
+      <gl-button
+        data-testid="sidebar-toggle"
+        icon="chevron-double-lg-left"
+        class="d-block d-sm-none gutter-toggle issuable-gutter-toggle"
+        :aria-label="__('Expand sidebar')"
+        @click="handleRightSidebarToggleClick"
+      />
+    </div>
+    <div
+      data-testid="header-actions"
+      class="detail-page-header-actions js-issuable-actions js-issuable-buttons gl-display-flex gl-display-md-block"
+    >
+      <slot name="header-actions"></slot>
+    </div>
+  </div>
+</template>

spec/frontend/issuable_show/components/issuable_header_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlIcon, GlAvatarLabeled } from '@gitlab/ui';
+
+import IssuableHeader from '~/issuable_show/components/issuable_header.vue';
+
+import { mockIssuableShowProps, mockIssuable } from '../mock_data';
+
+const issuableHeaderProps = {
+  ...mockIssuable,
+  ...mockIssuableShowProps,
+};
+
+const createComponent = (propsData = issuableHeaderProps) =>
+  shallowMount(IssuableHeader, {
+    propsData,
+    slots: {
+      'status-badge': 'Open',
+      'header-actions': `
+        <button class="js-close">Close issuable</button>
+        <a class="js-new" href="/gitlab-org/gitlab-shell/-/issues/new">New issuable</a>
+      `,
+    },
+  });
+
+describe('IssuableHeader', () => {
+  let wrapper;
+  const findByTestId = testId => wrapper.find(`[data-testid="${testId}"]`);
+
+  beforeEach(() => {
+    wrapper = createComponent();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('computed', () => {
+    describe('authorId', () => {
+      it('returns numeric ID from GraphQL ID of `author` prop', () => {
+        expect(wrapper.vm.authorId).toBe(1);
+      });
+    });
+  });
+
+  describe('handleRightSidebarToggleClick', () => {
+    beforeEach(() => {
+      setFixtures('<button class="js-toggle-right-sidebar-button">Collapse sidebar</button>');
+    });
+
+    it('dispatches `click` event on sidebar toggle button', () => {
+      wrapper.vm.toggleSidebarButtonEl = document.querySelector('.js-toggle-right-sidebar-button');
+      jest.spyOn(wrapper.vm.toggleSidebarButtonEl, 'dispatchEvent').mockImplementation(jest.fn);
+
+      wrapper.vm.handleRightSidebarToggleClick();
+
+      expect(wrapper.vm.toggleSidebarButtonEl.dispatchEvent).toHaveBeenCalledWith(
+        expect.objectContaining({
+          type: 'click',
+        }),
+      );
+    });
+  });
+
+  describe('template', () => {
+    it('renders issuable status icon and text', () => {
+      const statusBoxEl = findByTestId('status');
+
+      expect(statusBoxEl.exists()).toBe(true);
+      expect(statusBoxEl.find(GlIcon).props('name')).toBe(mockIssuableShowProps.statusIcon);
+      expect(statusBoxEl.text()).toContain('Open');
+    });
+
+    it('renders blocked icon when issuable is blocked', async () => {
+      wrapper.setProps({
+        blocked: true,
+      });
+
+      await wrapper.vm.$nextTick();
+
+      const blockedEl = findByTestId('blocked');
+
+      expect(blockedEl.exists()).toBe(true);
+      expect(blockedEl.find(GlIcon).props('name')).toBe('lock');
+    });
+
+    it('renders confidential icon when issuable is confidential', async () => {
+      wrapper.setProps({
+        confidential: true,
+      });
+
+      await wrapper.vm.$nextTick();
+
+      const confidentialEl = findByTestId('confidential');
+
+      expect(confidentialEl.exists()).toBe(true);
+      expect(confidentialEl.find(GlIcon).props('name')).toBe('eye-slash');
+    });
+
+    it('renders issuable author avatar', () => {
+      const { username, name, webUrl, avatarUrl } = mockIssuable.author;
+      const avatarElAttrs = {
+        'data-user-id': '1',
+        'data-username': username,
+        'data-name': name,
+        href: webUrl,
+        target: '_blank',
+      };
+      const avatarEl = findByTestId('avatar');
+      expect(avatarEl.exists()).toBe(true);
+      expect(avatarEl.attributes()).toMatchObject(avatarElAttrs);
+      expect(avatarEl.find(GlAvatarLabeled).attributes()).toMatchObject({
+        size: '24',
+        src: avatarUrl,
+        label: name,
+      });
+    });
+
+    it('renders sidebar toggle button', () => {
+      const toggleButtonEl = findByTestId('sidebar-toggle');
+
+      expect(toggleButtonEl.exists()).toBe(true);
+      expect(toggleButtonEl.props('icon')).toBe('chevron-double-lg-left');
+    });
+
+    it('renders header actions', () => {
+      const actionsEl = findByTestId('header-actions');
+
+      expect(actionsEl.find('button.js-close').exists()).toBe(true);
+      expect(actionsEl.find('a.js-new').exists()).toBe(true);
+    });
+  });
+});

spec/frontend/issuable_show/mock_data.js

+import { mockIssuable as issuable } from '../issuable_list/mock_data';
+
+export const mockIssuable = {
+  ...issuable,
+  id: 'gid://gitlab/Issue/30',
+  title: 'Sample title',
+  titleHtml: 'Sample title',
+  description: '# Summary',
+  descriptionHtml:
+    '<h1 data-sourcepos="1:1-1:25" dir="auto">&#x000A;<a id="user-content-magnoque-it-lurida-deus" class="anchor" href="#magnoque-it-lurida-deus" aria-hidden="true"></a>Summary</h1>',
+  state: 'opened',
+  blocked: false,
+  confidential: false,
+  currentUserTodos: {
+    nodes: [
+      {
+        id: 'gid://gitlab/Todo/489',
+        state: 'done',
+      },
+    ],
+  },
+};
+
+export const mockIssuableShowProps = {
+  issuable: mockIssuable,
+  descriptionHelpPath: '/help/user/markdown',
+  descriptionPreviewPath: '/gitlab-org/gitlab-shell/preview_markdown',
+  editFormVisible: false,
+  enableAutocomplete: true,
+  enableEdit: true,
+  statusBadgeClass: 'status-box-open',
+  statusIcon: 'issue-open-m',
+};