How can I use Supertest for mocking API requests?

How can I use Supertest for mocking API requests?

You can use Supertest to test HTTP requests in Node.js applications. It allows you to mock API requests easily.

Can you show me a basic example of how to set it up?

Sure! First, install Supertest with npm. Then, you can create a test file and use it like this:

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

describe('GET /api', () => {
  it('responds with json', async () => {
    const response = await request(app)
      .get('/api')
      .expect('Content-Type', /json/)
      .expect(200);
  });
});

What if I want to mock a POST request?

You can mock a POST request similarly. Just change the method to post() and provide the data:

const response = await request(app)
  .post('/api')
  .send({ key: 'value' })
  .expect(201);