Add test for event listener

Tests/EventListener/RequestListenerTest.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the NelmioApiDocBundle.
+ *
+ * (c) Nelmio <hello@nelm.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\ApiDocBundle\Tests\EventListener;
+
+use Nelmio\ApiDocBundle\Tests\WebTestCase;
+
+class RequestListenerTest extends WebTestCase
+{
+    public function testDocQueryArg()
+    {
+        $client = $this->createClient();
+
+        $crawler = $client->request('GET', '/tests?_doc=1');
+        $this->assertEquals('/tests', trim($crawler->filter(".operation .path:contains('/tests')")->text()), 'Event listener should capture ?_doc=1 requests');
+
+        $client->request('GET', '/tests');
+        $this->assertEquals('tests', $client->getResponse()->getContent(), 'Event listener should let normal requests through');
+    }
+}

Tests/Fixtures/Controller/TestController.php

@@ -12,6 +12,7 @@
 namespace Nelmio\ApiDocBundle\Tests\Fixtures\Controller;
 
 use Nelmio\ApiDocBundle\Annotation\ApiDoc;
+use Symfony\Component\HttpFoundation\Response;
 
 class TestController
 {
@@ -27,6 +28,7 @@ class TestController
      */
     public function indexAction()
     {
+        return new Response('tests');
     }
 
     /**