app/javascript/packages/components/page-footer.spec.tsx
import { render } from '@testing-library/react';
import PageFooter from './page-footer';
describe('PageFooter', () => {
it('renders its children content', () => {
const { getByText } = render(<PageFooter>Content</PageFooter>);
expect(getByText('Content')).to.exist();
});
});