public async Task GetPlayListByIdShouldGetPlayList() { var playListId = 1; var playList = new PlayList { Id = playListId }; _mixBLMock.Setup(x => x.GetPlayListByIDAsync(It.IsAny <int>())).Returns(Task.FromResult(playList)); var playListController = new PlayListController(_mixBLMock.Object); var result = await playListController.GetPlaylistByIDAsync(playListId); Assert.Equal(playListId, ((PlayList)((OkObjectResult)result).Value).Id); _mixBLMock.Verify(x => x.GetPlayListByIDAsync(playListId)); }