feat: add tests

src/generic/PageNotFound.test.jsx

@@ -0,0 +1,41 @@
+import { getConfig, history } from '@edx/frontend-platform';
+import { Routes, Route } from 'react-router-dom';
+import { sendTrackEvent } from '@edx/frontend-platform/analytics';
+
+import {
+  initializeTestStore,
+  render,
+  screen,
+} from '../setupTest';
+import PageNotFound from './PageNotFound';
+import messages from './messages';
+
+jest.mock('@edx/frontend-platform/analytics');
+
+describe('PageNotFound', () => {
+  beforeEach(async () => {
+    await initializeTestStore();
+    const invalidUrl = '/new/course';
+    history.push(invalidUrl);
+    render(
+      <Routes>
+        <Route path="*" element={<PageNotFound />} />
+      </Routes>,
+      { wrapWithRouter: true },
+    );
+  });
+
+  it('displays page not found header', () => {
+    expect(screen.getByText(messages.pageNotFoundHeader.defaultMessage)).toBeVisible();
+  });
+
+  it('displays link back to learner dashboard', () => {
+    const expected = getConfig().LMS_BASE_URL;
+    const homepageLink = screen.getByRole('link', { name: messages.homepageLink.defaultMessage });
+    expect(homepageLink).toHaveAttribute('href', expected);
+  });
+
+  it('calls tracking events', () => {
+    expect(sendTrackEvent).toHaveBeenCalled();
+  });
+});