refactor(app): move react components to react codebase [EE-3179] (#6971)

app/react/components/PageHeader/HeaderTitle.test.tsx

@@ -0,0 +1,40 @@
+import { UserContext } from '@/portainer/hooks/useUser';
+import { UserViewModel } from '@/portainer/models/user';
+import { render } from '@/react-tools/test-utils';
+
+import { HeaderContainer } from './HeaderContainer';
+import { HeaderTitle } from './HeaderTitle';
+
+test('should not render without a wrapping HeaderContainer', async () => {
+  const consoleErrorFn = jest
+    .spyOn(console, 'error')
+    .mockImplementation(() => jest.fn());
+
+  const title = 'title';
+  function renderComponent() {
+    return render(<HeaderTitle title={title} />);
+  }
+
+  expect(renderComponent).toThrowErrorMatchingSnapshot();
+
+  consoleErrorFn.mockRestore();
+});
+
+test('should display a HeaderTitle', async () => {
+  const username = 'username';
+  const user = new UserViewModel({ Username: username });
+
+  const title = 'title';
+  const { queryByText } = render(
+    <UserContext.Provider value={{ user }}>
+      <HeaderContainer>
+        <HeaderTitle title={title} />
+      </HeaderContainer>
+    </UserContext.Provider>
+  );
+
+  const heading = queryByText(title);
+  expect(heading).toBeVisible();
+
+  expect(queryByText(username)).toBeVisible();
+});