How do I set up Jest in my React project?

How do I set up Jest in my React project?

To set up Jest in your React project, you first need to install it. You can do this by running npm install --save-dev jest.

Do I need to configure anything after installation?

Yes, you might need to add a configuration file. Create a jest.config.js file in your project root to customize your setup.

What should I include in the jest.config.js file?

You can start with basic settings like moduleFileExtensions, testEnvironment, and testMatch. Here's a simple example:

module.exports = {
  moduleFileExtensions: ['js', 'jsx'],
  testEnvironment: 'jsdom',
  testMatch: ['**/?(*.)+(spec|test).[jt]s?(x)'],
};

How do I run my tests once everything is set up?

You can run your tests by adding a script in your package.json like this:

"scripts": {
  "test": "jest"
}

Then, just run npm test in your terminal.