public ServiceInfo getPushData(Service service) {
        ServiceInfo result = emptyServiceInfo(service);
        if (!ServiceManager.getInstance().containSingleton(service)) {
            return result;
        }
        Service singleton = ServiceManager.getInstance().getSingleton(service);
        result.setHosts(getAllInstancesFromIndex(singleton));
        serviceDataIndexes.put(singleton, result);
        return result;
    }
@Test
    void testGetPushData() {
        ServiceInfo pushData = serviceStorage.getPushData(SERVICE);
        
        Mockito.verify(switchDomain).getDefaultPushCacheMillis();
        assertNotNull(pushData);
    }