Method test_callback_attribute

Lib/test/test_weakref.py:990–997

(self)

        gc.collect()

    def test_callback_attribute(self):
        x = Object(1)
        callback = lambda ref: None
        ref1 = weakref.ref(x, callback)
        self.assertIs(ref1.__callback__, callback)

        ref2 = weakref.ref(x)
        self.assertIsNone(ref2.__callback__)

    def test_callback_attribute_after_deletion(self):
        x = Object(1)