@Override
    public void subscribe(URL url, NotifyListener listener) {
        try {
            if (registry != null) {
                registry.subscribe(url, listener);
            }
        } finally {
            listenerEvent(serviceListener -> serviceListener.onSubscribe(url, registry));
        }
    }
@Test
    void testSubscribe() {

        Map<String, String> parameters = new HashMap<>();
        parameters.put(INTERFACE_KEY, DemoService.class.getName());
        parameters.put("registry", "zookeeper");
        parameters.put("register", "true");
        parameters.put(REGISTER_IP_KEY, "172.23.236.180");
        parameters.put("registry.listeners", "listener-one");

        Map<String, Object> attributes = new HashMap<>();
        ServiceConfigURL serviceConfigURL = new ServiceConfigURL(
                "registry", "127.0.0.1", 2181, "org.apache.dubbo.registry.RegistryService", parameters);
        Map<String, String> refer = new HashMap<>();
        attributes.put(REFER_KEY, refer);
        attributes.put("key1", "value1");
        URL url = serviceConfigURL.addAttributes(attributes);

        RegistryFactory registryFactory = mock(RegistryFactory.class);
        Registry registry = mock(Registry.class);
        NotifyListener notifyListener = mock(NotifyListener.class);
        when(registryFactory.getRegistry(url)).thenReturn(registry);

        RegistryFactoryWrapper registryFactoryWrapper = new RegistryFactoryWrapper(registryFactory);
        Registry registryWrapper = registryFactoryWrapper.getRegistry(url);

        Assertions.assertTrue(registryWrapper instanceof ListenerRegistryWrapper);

        URL subscribeUrl = new ServiceConfigURL("dubbo", "127.0.0.1", 20881, DemoService.class.getName(), parameters);

        RegistryServiceListener listener = Mockito.mock(RegistryServiceListener.class);
        RegistryServiceListener1.delegate = listener;

        registryWrapper.subscribe(subscribeUrl, notifyListener);
        verify(listener, times(1)).onSubscribe(subscribeUrl, registry);
    }