'Ensures that volume type creation fails with invalid args.'

def test_invalid_volume_types_params(self):

    self.assertRaises(exception.InvalidVolumeType, volume_types.destroy, self.ctxt, None)
    self.assertRaises(exception.InvalidVolumeType, volume_types.get_volume_type, self.ctxt, None)
    self.assertRaises(exception.InvalidVolumeType, volume_types.get_volume_type_by_name, self.ctxt, None)
