public async Task GetPlayListByIdAsyncShouldGetPlayList()
{
var playListId = 1;
var newPlayList = new PlayList();
_musicBLMock.Setup(x => x.GetPlayListByIDAsync(It.IsAny <int>())).Returns(Task.FromResult <PlayList>(newPlayList));
var newMusicBL = new UploadedMusicBL(_musicBLMock.Object);
var result = await newMusicBL.GetPlayListByIDAsync(playListId);
Assert.Equal(result, newPlayList);
_musicBLMock.Verify(x => x.GetPlayListByIDAsync(It.IsAny <int>()));
}
