Message8398

Interesting, I was reviewing test_abc.py and I see that there was a related problem in CPython earlier, as seen in the commented-out code. Of course this commented-out code actually works on both CPython and Jython now, so we have to fix Arfrever's case:

    def test_isinstance_class(self):
        class A:
            __metaclass__ = abc.ABCMeta
        class OldstyleClass:
            pass
        self.assertFalse(isinstance(OldstyleClass, A))
        self.assertTrue(isinstance(OldstyleClass, type(OldstyleClass)))
        self.assertFalse(isinstance(A, OldstyleClass))
        # This raises a recursion depth error, but is low-priority:
        # self.assertTrue(isinstance(A, abc.ABCMeta))