Install and configure Jest + React Testing Library

For React + Vite projects

1. Install:

yarn add --dev jest babel-jest @babel/preset-env @babel/preset-react 
yarn add --dev @testing-library/react @types/jest jest-environment-jsdom

2. Optional: If we use Fetch API in our project:

yarn add --dev whatwg-fetch

3. Update the scripts in package.json

"scripts: {
  ...
  "test": "jest --watchAll"

4. Create the configuration from babel babel.config.js

module.exports = {
    presets: [
        [ '@babel/preset-env', { targets: { esmodules: true } } ],
        [ '@babel/preset-react', { runtime: 'automatic' } ],
    ],
};

5. Optional, but sometimes it's necessary, create Jest config and setup:

jest.config.js

module.exports = {
    testEnvironment: 'jest-environment-jsdom',
    setupFiles: ['./jest.setup.js']
}

jest.setup.js

// In case we need to set up Fetch API
import 'whatwg-fetch'; // <-- yarn add whatwg-fetch