    @Test
    public void testHandlerPackageSingle() {

        String configName = "rpc-router-false-package";
        RpcRouterConfig config = (RpcRouterConfig) Config.getInstance().getJsonObjectConfig(configName, RpcRouterConfig.class);
        List<String> handlers;
        try (ScanResult scanResult = new ClassGraph()
                .whitelistPackages(config.getHandlerPackage())
                .enableAllInfo()
                .scan()) {
            handlers = scanResult
                    .getClassesWithAnnotation(ServiceHandler.class.getName())
                    .getNames();
        }
        Assert.assertTrue(handlers.size() > 0);
    }