public async Task MusicsController_GetMusicById_ReturnOk() { var options = new DbContextOptionsBuilder <MyMusicDbContext>() .UseInMemoryDatabase(databaseName: "TestNewListDb").Options; using (var context = new MyMusicDbContext(options)) { _UnitOfWork = new UnitOfWork(context); _musicService = new MusicService(_UnitOfWork); var controller = new MusicsController(_musicService, _mapper); var listMusic = new List <MyMusic.Core.Model.Music>(); var musicTest = new List <MyMusic.Core.Model.Music>() { new MyMusic.Core.Model.Music() { Id = 1, Name = "Music Name1", ArtistId = 1, Artist = new Core.Model.Artist() { Id = 1, Name = "ArtistName", Musics = listMusic } }, new MyMusic.Core.Model.Music() { Id = 2, Name = "Music Name2", ArtistId = 2, Artist = new Core.Model.Artist() { Id = 2, Name = "ArtistName", Musics = listMusic } } }; await context.Musics.AddRangeAsync(musicTest); await context.SaveChangesAsync(); var result = controller.GetMusicById(1).GetAwaiter().GetResult().Result as OkObjectResult; Assert.IsType <OkObjectResult>(result); var musicResourse = Assert.IsType <MusicResource>(result.Value); Assert.Equal(1, musicResourse.Id); Assert.Equal("Music Name1", musicResourse.Name); }; }