def test_postMessage(self):
        q = self.mq.queue("test_queue")
        old_size = q.size()
        q.post("test message")
        self.assertEqual(old_size, 1 - q.size())
dataset/ETHPy150Open iron-io/iron_mq_python/test.py/TestIronMQ.test_postMessage/swapped operands of `-`