fix static test failure

Author: glo60612

app/code/Magento/AdminNotification/Controller/Adminhtml/Notification/Index.php

@@ -6,6 +6,7 @@
 namespace Magento\AdminNotification\Controller\Adminhtml\Notification;
 
 use Magento\Framework\App\Action\HttpGetActionInterface as HttpGetActionInterface;
+use Magento\Framework\View\Result\Page;
 
 class Index extends \Magento\AdminNotification\Controller\Adminhtml\Notification implements HttpGetActionInterface
 {
@@ -14,14 +15,14 @@ class Index extends \Magento\AdminNotification\Controller\Adminhtml\Notification
      */
     public function execute()
     {
-        $this->_view->loadLayout();
-        $this->_setActiveMenu(
-            'Magento_AdminNotification::system_adminnotification'
-        )->_addBreadcrumb(
+        /** @var Page $resultPage */
+        $resultPage = $this->resultFactory->create(\Magento\Framework\Controller\ResultFactory::TYPE_PAGE);
+        $resultPage->setActiveMenu('Magento_AdminNotification::system_adminnotification');
+        $resultPage->addBreadcrumb(
             __('Messages Inbox'),
             __('Messages Inbox')
         );
-        $this->_view->getPage()->getConfig()->getTitle()->prepend(__('Notifications'));
-        $this->_view->renderLayout();
+        $resultPage->getConfig()->getTitle()->prepend(__('Notifications'));
+        return $resultPage;
     }
 }