public void AverageRatingOnMovie_ValidNumber_ReturnsAverageRatingZero(int movie, double average)
{
FakeMovieRatingRepository movieRatingRepository = new FakeMovieRatingRepository();
movieRatingRepository.Add(new MovieRating(1, 1, 2, DateTime.Now));
movieRatingRepository.Add(new MovieRating(2, 1, 4, DateTime.Now));
movieRatingRepository.Add(new MovieRating(2, 2, 1, DateTime.Now));
movieRatingRepository.Add(new MovieRating(2, 2, 1, DateTime.Now));
IMovieRatingService movieRatingService = new MovieRatingService(movieRatingRepository);
double actual = movieRatingService.AverageRatingOnMovie(movie);
Assert.Equal(average, actual);
}