How can I integrate Jest with TypeScript for testing?

How can I integrate Jest with TypeScript for testing?

To integrate Jest with TypeScript, you need to install Jest, TypeScript, and ts-jest. Would you like a step-by-step guide?

Yes, please provide the steps.

1. Install Jest and ts-jest: npm install --save-dev jest ts-jest @types/jest
2. Create a jest.config.js file and configure it to use ts-jest.
3. Add a test script in your package.json.
4. Write your tests in .test.ts files.

What configuration should I add in jest.config.js?

Your jest.config.js should look like this:

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
};

Can I run tests in a browser environment?

Yes, you can set the testEnvironment to 'jsdom' in your Jest configuration to run tests in a browser-like environment.