      .Times(testing::AtLeast(1))

  EXPECT_CALL(*rpc_client_, asyncQueryRoute).Times(testing::AtLeast(1)).WillRepeatedly(testing::Invoke(rpc_cb));

  EXPECT_CALL(*rpc_client_, asyncAck).Times(testing::AtLeast(1)).WillRepeatedly(testing::Invoke(mock_ack));
