Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/http-kernel/Tests/TestHttpKernel.php

@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Tests;
+
+use Symfony\Component\HttpKernel\HttpKernel;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface;
+use Symfony\Component\EventDispatcher\EventDispatcher;
+
+class TestHttpKernel extends HttpKernel implements ControllerResolverInterface
+{
+    public function __construct()
+    {
+        parent::__construct(new EventDispatcher(), $this);
+    }
+
+    public function getController(Request $request)
+    {
+        return array($this, 'callController');
+    }
+
+    public function getArguments(Request $request, $controller)
+    {
+        return array($request);
+    }
+
+    public function callController(Request $request)
+    {
+        return new Response('Request: '.$request->getRequestUri());
+    }
+}