def test_identifier_type_instance(self): check_type(IdentifierType.album)
def test_valid(self): for t in ('artist', 'album', 'playlist', 'track'): check_type(t)
def test_invalid(self): with pytest.raises(ConversionError): check_type('invalid')
def test_valid(self): for t in ('artist', 'album', 'episode', 'playlist', 'show', 'track', 'user'): check_type(t)