public void SongFinished_EmptyQueue_EmptyLibrary_PlayNothing()
        {
            var engine = new FakePlayerEngine();

            control.Player.RegisterPlayerEngine(engine);
            var song = new Song("artist", "album", "song", "1", "path");

            control.Player.PlaySong(song);
            engine.Finish();
            Assert.AreEqual(null, control.Player.NowPlaying);
        }
        public void SongFinished_PlayNextFromQueue()
        {
            var engine = new FakePlayerEngine();

            control.Player.RegisterPlayerEngine(engine);
            PlayerEngineFactory.Engine = engine;
            var song  = new Song("artist", "album", "song", "1", "path");
            var song2 = new Song("artist", "album", "song2", "2", "path2");

            control.Player.PlaySong(song);
            control.Player.PlaySong(song2);
            engine.Finish();
            Assert.AreEqual(song2, engine.PlayedSong);
            Assert.AreEqual(song2, control.Player.NowPlaying);
        }