How do I configure Jest for React Testing Library?

How do I configure Jest for React Testing Library?

To configure Jest for React Testing Library, you need to install the necessary packages and set up your Jest configuration file.

What packages do I need to install?

You need to install jest, @testing-library/react, and @testing-library/jest-dom. You can do this using npm or yarn.

Can you show me an example of a Jest configuration file?

Sure! Here's a basic example:

{
  "preset": "react-native",
  "setupFilesAfterEnv": ["<rootDir>/setupTests.js"],
  "testEnvironment": "jsdom"
}

What should I include in the setupTests.js file?

In setupTests.js, you can import @testing-library/jest-dom to extend Jest's matchers. Just add:

import '@testing-library/jest-dom/extend-expect';