public void Delete_RemovesCorrectAlbum() { // Arrange var context = this.ServiceProvider.GetRequiredService <WmipDbContext>(); var album1 = new Album { Id = 1, Name = "Abm1" }; var album2 = new Album { Id = 2, Name = "Abm2" }; context.Albums.AddRange(album1, album2); context.SaveChanges(); var albumsService = new AlbumsService(context); // Act albumsService.Delete(1); //Assert Assert.Single(context.Albums); Assert.Equal(album2.Name, context.Albums.First().Name); }