How do I set up Jest for my Express.js application?

How do I set up Jest for my Express.js application?

To set up Jest for your Express.js application, first install Jest and any necessary dependencies using npm.

What dependencies do I need to install?

You need to install Jest and supertest for testing HTTP requests. Run npm install --save-dev jest supertest.

How do I configure Jest in my project?

Create a jest.config.js file in your project root and configure it according to your needs, like setting the test environment.

Can you show me an example test for an Express route?

Sure! Here's a simple test:

const request = require('supertest');
const app = require('./app');

test('GET /api/users', async () => {
  const response = await request(app).get('/api/users');
  expect(response.statusCode).toBe(200);
});