public async Task CreateMovieShouldAddMovieToRepository() { AutoMapperConfig.RegisterMappings(typeof(MovieTestModel).Assembly); var options = new DbContextOptionsBuilder <ApplicationDbContext>() .UseInMemoryDatabase(Guid.NewGuid().ToString()); var repository = new EfDeletableEntityRepository <Movie>(new ApplicationDbContext(options.Options)); await repository.AddAsync(new Movie { Id = 1, Name = "Movie1" }); await repository.AddAsync(new Movie { Id = 2, Name = "Movie2" }); await repository.SaveChangesAsync(); var service = new MoviesService(repository, null, null, null); var movie = new CreateMovieServiceInputModel { Name = "TestMovie", Length = 50, Directors = new[] { "Test" }, Genres = new[] { "1" }, Actors = new[] { "Test" }, }; await service.CreaterMovieAsync(movie); var genresCount = service.GetAll <MovieTestModel>().Count; Assert.Equal(3, genresCount); }