favorite-movies.service.spec.ts

describe('FavoriteMoviesService', () => {
  let serviceUnderTest: FavoriteMoviesService;
  let http: HttpTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [HttpClientTestingModule],
      providers: [FavoriteMoviesService]
    });

    serviceUnderTest = TestBed.get(FavoriteMoviesService);
    http = TestBed.get(HttpTestingController);
  });

  it('should return the favorite movies from the backend', () => {
    let result: Movie[] = [];
    serviceUnderTest.getFavoriteMovies().subscribe(data => {
     result = data;
    });

    const req = http.expectOne(environment.favoriteUrl);
    expect(req.request.method).toEqual('GET');

    req.flush(moviesToUse);
    http.verify();
  });
})