def test_instance_argument_base_type_error(self):
# ensure TypeError is raised when a base type is passed to something
# expecting a derived type
obj = Regress.TestSubObj()
self.assertEqual(Regress.TestSubObj.instance_method(obj), 0)
self.assertRaises(TypeError, Regress.TestSubObj.instance_method,
GObject.Object())
self.assertRaises(TypeError, Regress.TestSubObj.instance_method,
Regress.TestObj())
