'On Python 3 or on Py2 when C{TWISTED_NEWSTYLE} is not set,
L{_oldStyle._oldStyle} is a no-op.'

def test_noOpByDefault(self):

    updatedClass = _oldstyle._oldStyle(SomeOldStyleClass)
    self.assertEqual(type(updatedClass), type(SomeOldStyleClass))
    self.assertIs(updatedClass, SomeOldStyleClass)
