Add missing AppBundle directory

src/AppBundle/AppBundle.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace AppBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class AppBundle extends Bundle
+{
+}

src/AppBundle/Controller/DefaultController.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace AppBundle\Controller;
+
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+
+class DefaultController extends Controller
+{
+    /**
+     * @Route("/app/example", name="homepage")
+     */
+    public function indexAction()
+    {
+        return $this->render('default/index.html.twig');
+    }
+}

src/AppBundle/Tests/Controller/DefaultControllerTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace AppBundle\Tests\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+class DefaultControllerTest extends WebTestCase
+{
+    public function testIndex()
+    {
+        $client = static::createClient();
+
+        $crawler = $client->request('GET', '/app/example');
+
+        $this->assertEquals(200, $client->getResponse()->getStatusCode());
+        $this->assertTrue($crawler->filter('html:contains("Homepage")')->count() > 0);
+    }
+}