How do I set up testing in a Next.js application?

How do I set up testing in a Next.js application?

To set up testing in a Next.js application, you can use Jest and React Testing Library. First, install them using npm or yarn.

What packages do I need to install?

You need to install jest, @testing-library/react, and @testing-library/jest-dom. You can do this with: npm install --save-dev jest @testing-library/react @testing-library/jest-dom.

How do I configure Jest for my Next.js project?

Create a jest.config.js file in your project root and add the necessary configurations, like setting up the test environment.

Can you give me an example of a simple test?

Sure! Here's a simple test for a component:

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

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