test_ssl.py 文件源码

def test_old_callback_forgotten(self):
        """
        If L{Context.set_tlsext_servername_callback} is used to specify a new
        callback, the one it replaces is dereferenced.
        """
        def callback(connection):
            pass

        def replacement(connection):
            pass

        context = Context(TLSv1_METHOD)
        context.set_tlsext_servername_callback(callback)

        tracker = ref(callback)
        del callback

        context.set_tlsext_servername_callback(replacement)
        collect()
        self.assertIdentical(None, tracker())