@Override
    public void registerInstance(String serviceName, String ip, int port) throws NacosException {
        registerInstance(serviceName, ip, port, Constants.DEFAULT_CLUSTER_NAME);
    }
@Test
    void testRegisterInstance5() throws NacosException {
        //given
        String serviceName = "service1";
        Instance instance = new Instance();
        //when
        client.registerInstance(serviceName, instance);
        //then
        verify(proxy, times(1)).registerService(serviceName, Constants.DEFAULT_GROUP, instance);
    }