public void AddAlbum_sets_band_property_on_album()
{
var band = new BandModel();
var album = new Album();
band.AddAlbum(album);
Assert.AreSame(band, album.Band);
}
public void AddAlbum_increases_album_collection_by_one()
{
var band = new BandModel();
band.AddAlbum(new Album());
Assert.AreEqual(1, band.Albums.Count);
}