public async Task GetCommentsAsyncShouldReturnAllTheComments()
        {
            var comments = new List <Comments> {
                new Comments()
                {
                    Id = 1
                }, new Comments()
                {
                    Id = 5
                }
            };

            databaseMock.Setup(db => db.GetCommentsAsync()).Returns(Task.FromResult <List <Comments> >(comments));
            var newMusicBL = new UploadedMusicBL(databaseMock.Object);

            var result = await newMusicBL.GetCommentsAsync();

            Assert.NotNull(result);
            Assert.Equal(2, comments.Count());
            databaseMock.Verify(db => db.GetCommentsAsync());
        }