spring-boot-rest/spring-boot-modules/spring-boot-react/frontend/src/App.test.js

import { render, screen } from '@testing-library/react';
import App from './App';

test('renders learn react link', () => {
  render(<App />);
  const linkElement = screen.getByText(/Clients/i);
  expect(linkElement).toBeInTheDocument();
});