Method test_contains_count_index_stop_crashes

Lib/test/test_deque.py:169–183

(self)

            n in d

    def test_contains_count_index_stop_crashes(self):
        class A:
            def __eq__(self, other):
                d.clear()
                return NotImplemented
        d = deque([A(), A()])
        with self.assertRaises(RuntimeError):
            _ = 3 in d
        d = deque([A(), A()])
        with self.assertRaises(RuntimeError):
            _ = d.count(3)

        d = deque([A()])
        with self.assertRaises(RuntimeError):
            d.index(0)

    def test_extend(self):
        d = deque('a')