favorite-movies.component.spec.ts

    it('should delete a favorite movie when the user wants to', () => {
      jest.spyOn(favoriteMovieService, 'deleteMovie');
      const favoriteMovieToDelete = favoriteMoviesToUse[0];

      const componentToDelete = fixture.debugElement.queryAll(
        By.directive(FavoriteMovieComponent)
      )[0].componentInstance as FavoriteMovieComponent;

      componentToDelete.deleteMovie.emit(favoriteMovieToDelete);
      expect(favoriteMovieService.deleteMovie).toHaveBeenCalledWith(favoriteMovieToDelete);
    });