httpclient_test.py 文件源码

def test_final_callback_stack_context(self):
        # The final callback should be run outside of the httpclient's
        # stack_context.  We want to ensure that there is not stack_context
        # between the user's callback and the IOLoop, so monkey-patch
        # IOLoop.handle_callback_exception and disable the test harness's
        # context with a NullContext.
        # Note that this does not apply to secondary callbacks (header
        # and streaming_callback), as errors there must be seen as errors
        # by the http client so it can clean up the connection.
        exc_info = []

        def handle_callback_exception(callback):
            exc_info.append(sys.exc_info())
            self.stop()
        self.io_loop.handle_callback_exception = handle_callback_exception
        with NullContext():
            self.http_client.fetch(self.get_url('/hello'),
                                   lambda response: 1 / 0)
        self.wait()
        self.assertEqual(exc_info[0][0], ZeroDivisionError)