How to use

favorites

function

in

Array

describe('GET /api/tutorials/me/favorites', () => {
    test('should return list of favorite tutorials of the user', done => {
      request(app)
        .get('/api/tutorials/me/favorites')
        .set('Authorization', userOneToken)
        .expect(200)
        .expect(res => {
          expect(res.body.favorites.length).toBe(users[0].favorites.length);
        })
        .end(done);
    });
  });

describe('DELETE /api/tutorials/me/removefavorite/:tutorial', () => {
    test('should remove tutorial from favorites', done => {
      const favorites = users[0].favorites.length;
            expect(user.favorites.length).toBe(favorites - 1);
            done();
          });

describe('POST /api/tutorials/me/addfavorite/:tutorial', () => {
    test('should add tutorial to favorites', done => {
      const favorites = users[0].favorites.length;
            expect(user.favorites.length).toBe(favorites + 1);
            done();
          });
            expect(user.favorites.length).toBe(users[0].favorites.length);
            done();
          });