test_richcmp.py 文件源码

def test_misbehavin(self):
        class Misb:
            def __lt__(self_, other): return 0
            def __gt__(self_, other): return 0
            def __eq__(self_, other): return 0
            def __le__(self_, other): self.fail("This shouldn't happen")
            def __ge__(self_, other): self.fail("This shouldn't happen")
            def __ne__(self_, other): self.fail("This shouldn't happen")
            def __cmp__(self_, other): raise RuntimeError, "expected"
        a = Misb()
        b = Misb()
        self.assertEqual(a<b, 0)
        self.assertEqual(a==b, 0)
        self.assertEqual(a>b, 0)
        self.assertRaises(RuntimeError, cmp, a, b)