def test_lock_rpc(self):
        lock_rpc = ietf_netconf.Lock()
        lock_rpc.input.target.candidate = Empty()
        reply = self.es.execute_rpc(self.ncc, lock_rpc)
        self.assertIsNone(reply)

        unlock_rpc = ietf_netconf.Unlock()
        unlock_rpc.input.target.candidate = Empty()
        reply = self.es.execute_rpc(self.ncc, unlock_rpc)
        self.assertIsNone(reply)
    def test_unlock_rpc_fail(self):
        lock_rpc = ietf_netconf.Lock()
        lock_rpc.input.target.candidate = Empty()
        reply = self.es.execute_rpc(self.ncc, lock_rpc)
        self.assertIsNone(reply)

        unlock_rpc = ietf_netconf.Unlock()
        unlock_rpc.input.target.running = Empty()
        try:
            reply = self.es.execute_rpc(self.ncc, unlock_rpc)
        except Exception as e:
            self.assertIsInstance(e, YError)