favorite-movies.service.spec.ts

  it('should return the list of favorite movies if the backend returns an error 2 times and the succeds', () => {
    let favoriteMovies: Movie[] = [];
    serviceUnderTest.getFavoriteMovies().subscribe(data => {
      favoriteMovies = data;
    });

    const req = http.expectOne(environment.favoriteUrl, 'expected to make an initial request');
    expect(req.request.method).toEqual('GET');
    req.flush('ERROR', { status: 500, statusText: 'Internal server error' });

    const req1 = http.expectOne(environment.favoriteUrl, 'expected to make a second request');
    expect(req1.request.method).toEqual('GET');
    req1.flush('ERROR', { status: 500, statusText: 'Internal server error' });

    const req2 = http.expectOne(environment.favoriteUrl, 'exected to make a third request');
    expect(req2.request.method).toEqual('GET');
    req2.flush(moviesToUse);

    expect(favoriteMovies).toEqual(moviesToUse);
    http.verify();
  });