public void GetSongByIdAsyncTest()
        {
            var options = new DbContextOptionsBuilder <ApplicationDbContext>()
                          .UseInMemoryDatabase(databaseName: "InHarmonyTestControllerDB")
                          .Options;

            using (var context = new ApplicationDbContext(options))
            {
                context.Database.EnsureDeleted();
                context.Database.EnsureCreated();

                Repository         repository     = new Repository(context, _repositoryLogger);
                BusinessLogicClass logic          = new BusinessLogicClass(repository, _mapperClass, _repositoryLogger);
                SongController     songController = new SongController(logic, _songControllerLogger);
                // create a song
                var song = new Song();

                repository.songs.Add(song);
                context.SaveChanges();

                Assert.NotNull(songController.GetSongByIdAsync(song.Id));
            }
        }