def test_current_order(self):
        self.assertIsNone(self.order.current_order)
        mock_responses = mock.Mock()
        mock_responses.current_order = None
        self.order.responses = mock_responses
        self.assertEqual(self.order.current_order, mock_responses.place_response)
        mock_responses.current_order = 1
        self.assertEqual(self.order.current_order, 1)