React Unit Testing

React-Testing-Library |

Official Website  
The React Testing Library is a very light-weight solution for testing React components. is a testing utility tool that’s built to test the actual DOM tree rendered by React on the browser. The goal of the library is to help you write tests that resemble how a user would use your application.

example :

import { render, screen } from '@testing-library/react';
import App from './App';
 
test('renders learn react link', () => {
  render(<App />);
  const linkElement = screen.getByText(/some_text/i);
  expect(linkElement).toBeInTheDocument();
});

Command

npm run test:unit

For interactive mode:

npm run test:watch

For Test coverage:

npm run test:coverage