huahuibao/app-mall/controllers/TestController.php

<?php

namespace mall\controllers;

use bizMall\merchant\services\MerchantService;
use bizMall\message\services\InformAdminService;
use bizMall\order\services\OrderService;
use common\components\util;
use Yii;

class TestController extends BaseController
{

    public function actionIndex()
    {
        echo 'aaa';
    }

}