public void AlbumAsMenuItemViewModelPropertyItemShouldBeOfTypeMusicDirectoryChild()
 {
     _albumMusicDirectoryChild.Should().NotBeNull();
 }
 public void ExpandedArtistAsMenuItemViewModelPropertyItemShouldBeOfTypeMusicDirectoryChild()
 {
     _artistMusicDirectoryChild.Should().NotBeNull();
 }
 public void SongAsMenuItemViewModelPropertyItemShouldBeOfTypeMusicDirectoryChild()
 {
     _songMusicDirectoryChild.Should().NotBeNull();
 }