Advanced Node.js Development

Adding assertions to the test case

We're going to expect that a 200 comes back and we're also going to create a custom assertion, expecting something about the body. We'll provide our callback function with the response and we're going to expect that res.body.todos has a length of 2, .toBe(2). Now that we have this in place, all we have to do is tack on an end call, and pass in done as the argument.

describe('GET /todos', () => {
  it('should get all todos', (done) => {
    request(app)
    .get('/todos')
    .expect(200)
    .expect((res) => {
      expect(res.body.todos.length).toBe(2);
    })
    .end(done);
  )};
});

There is no need to provide a function to end, because we're not doing anything asynchronously.

With this in place, we are now good to go. We can save the ...