    @Test
    public void testSubscribe() {

        String key = "perf/dubbo.test.api.HelloService:1.0.0";
        Map<String, String> subscribe = new HashMap<String, String>();
        subscribe.put(key, null);
        Map<String, String> newSubscribe = UrlUtils.convertSubscribe(subscribe);
        assertEquals(subscribe, newSubscribe);
    }