public async Task ChangeRatingWorksAsync() { var searchCriteria = new SearchCriteria() { Title = "Wonder Woman" }; var movies = await _movieService.SearchAsync(searchCriteria).ConfigureAwait(false); Assert.IsTrue(movies.Any()); var wonderWoman = movies.FirstOrDefault(); Assert.IsNotNull(wonderWoman); var originalRating = wonderWoman.AverageRating; await _ratingService.AddOrUpdateRatingAsync(wonderWoman.Id, 1, 1.3M); movies = await _movieService.SearchAsync(searchCriteria).ConfigureAwait(false); Assert.IsTrue(movies.Any()); wonderWoman = movies.FirstOrDefault(); Assert.IsNotNull(wonderWoman); Assert.IsFalse(originalRating == wonderWoman.AverageRating); //Now reinstate the rating await _ratingService.AddOrUpdateRatingAsync(wonderWoman.Id, 1, 3.8M); movies = await _movieService.SearchAsync(searchCriteria).ConfigureAwait(false); Assert.IsTrue(movies.Any()); wonderWoman = movies.FirstOrDefault(); Assert.IsNotNull(wonderWoman); Assert.IsTrue(originalRating == wonderWoman.AverageRating); }