def test_structs(self):
v = Security.AuthorizationExternalForm()
self.assertEqual(v.bytes, None)
v.bytes = b"\x00" * 32
w = objc.repythonify(v, Security.AuthorizationExternalForm.__typestr__)
self.assertIsInstance(w, Security.AuthorizationExternalForm)
self.assertEqual(w.bytes, (0,) * 32)
