public static void checkServiceNameFormat(String combineServiceName) {
        String[] split = combineServiceName.split(Constants.SERVICE_INFO_SPLITER);
        if (split.length <= 1) {
            throw new IllegalArgumentException(
                    "Param 'serviceName' is illegal, it should be format as 'groupName@@serviceName'");
        }
        if (split[0].isEmpty()) {
            throw new IllegalArgumentException("Param 'serviceName' is illegal, groupName can't be empty");
        }
    }
@Test
    void testCheckServiceNameFormat() {
        String validServiceName = "group@@serviceName";
        NamingUtils.checkServiceNameFormat(validServiceName);
    }