How can I use Supertest for testing my APIs?

How can I use Supertest for testing my APIs?

Supertest is a popular testing library for HTTP servers in Node.js. You can use it to test your APIs by making requests and asserting responses.

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

Sure! First, install Supertest using npm: npm install supertest. Then, you can write a test like this:

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

describe('GET /api/users', () => {
  it('responds with json', async () => {
    const response = await request(app).get('/api/users');
    expect(response.status).toBe(200);
    expect(response.body).toHaveProperty('users');
  });
});

What kind of assertions can I make with Supertest?

You can assert the status code, response body, headers, and more. For example, you can check if a specific property exists in the response body or if the content type is correct.

Is it possible to test authentication with Supertest?

Yes, you can test authentication by including tokens or credentials in your requests. For example, you can add an authorization header to your request.