@Test
public void testMicrometerMetrics() throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {

    SimpleMeterRegistry registry = new SimpleMeterRegistry();
    try (SofaRpcMetrics metrics = new SofaRpcMetrics()) {
        metrics.bindTo(registry);
        Method handleEvent = EventBus.class.getDeclaredMethod(
            "handleEvent", Subscriber.class, Event.class);
        handleEvent.setAccessible(true);
        SofaRequest request = buildRequest();
        SofaResponse response = buildResponse();
        RpcInternalContext.getContext()
            .setAttachment(RpcConstants.INTERNAL_KEY_CLIENT_ELAPSE, 100)
            .setAttachment(RpcConstants.INTERNAL_KEY_IMPL_ELAPSE, 10)
            .setAttachment(RpcConstants.INTERNAL_KEY_REQ_SIZE, 3)
            .setAttachment(RpcConstants.INTERNAL_KEY_RESP_SIZE, 4);
        handleEvent.invoke(EventBus.class, metrics, new ClientEndInvokeEvent(request, response, null));
        handleEvent.invoke(EventBus.class, metrics, new ServerSendEvent(request, response, null));
        ServerConfig serverConfig = new ServerConfig();
        handleEvent.invoke(EventBus.class, metrics, new ServerStartedEvent(serverConfig, new ThreadPoolExecutor(1, 1,
            0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<>())));
        handleEvent.invoke(EventBus.class, metrics, new ServerStoppedEvent(serverConfig));
        handleEvent.invoke(EventBus.class, metrics, new ProviderPubEvent(new ProviderConfig<>()));
        handleEvent.invoke(EventBus.class, metrics, new ConsumerSubEvent(new ConsumerConfig<>()));
        Assert.assertEquals(12, registry.getMeters().size());
    }
}