def test_checkAndSet(self):
        return self._test(self.proto.checkAndSet("foo", "bar", cas="1234"),
            "cas foo 0 0 3 1234\r\nbar\r\n", "STORED\r\n", True)
L{MemCacheProtocol.checkAndSet} passes an additional cas identifier
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/test/test_memcache.py/MemCacheTestCase.test_checkAndSet