What are some examples of testing in Node.js?

What are some examples of testing in Node.js?

Node.js testing can include unit tests, integration tests, and end-to-end tests. Would you like examples of each?

Yes, please provide examples of unit tests.

For unit testing, you can use frameworks like Mocha or Jest. For instance, with Jest, you can test a simple function like this:

function add(a, b) {
  return a + b;
}

test('adds 1 + 2 to equal 3', () => {
  expect(add(1, 2)).toBe(3);
});

What about integration tests?

For integration tests, you can use Supertest with Mocha. Here's an example:

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

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