@Override
    public Service queryService(String serviceName) throws NacosException {
        return queryService(serviceName, Constants.DEFAULT_GROUP);
    }
@Test
    void testQueryService2() throws NacosException {
        //given
        String serviceName = "service1";
        Instance instance = new Instance();
        //when
        nacosNamingMaintainService.queryService(serviceName);
        //then
        verify(serverProxy, times(1)).queryService(serviceName, Constants.DEFAULT_GROUP);
    }