How can I test my Node.js API effectively?

How can I test my Node.js API effectively?

You can use tools like Mocha, Chai, or Jest for unit testing, and Supertest for HTTP assertions.

What is Supertest and how do I use it?

Supertest is a super-agent driven library that allows you to test HTTP servers in Node.js. You can use it to send requests and assert responses.

Can you show me a simple example of using Supertest?

Sure! Here's a basic example:

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');
  });
});