Change the way to login user in tests

Instead of using a HTTP request we just login user like FOSUser does.
It allows us to mock service in container for functional tests.

Also, fix a bad config name in fos_user for firewall

And finally, add functional test to PocketImport

tests/Wallabag/CoreBundle/WallabagCoreTestCase.php

@@ -3,6 +3,7 @@
 namespace Tests\Wallabag\CoreBundle;
 
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+use Symfony\Component\BrowserKit\Cookie;
 
 abstract class WallabagCoreTestCase extends WebTestCase
 {
@@ -20,7 +21,38 @@ abstract class WallabagCoreTestCase extends WebTestCase
         $this->client = static::createClient();
     }
 
+    /**
+     * Login a user without making a HTTP request.
+     * If we make a HTTP request we lose ability to mock service in the container.
+     *
+     * @param string $username User to log in
+     */
     public function logInAs($username)
+    {
+        $container = $this->client->getContainer();
+        $session = $container->get('session');
+
+        $userManager = $container->get('fos_user.user_manager');
+        $loginManager = $container->get('fos_user.security.login_manager');
+        $firewallName = $container->getParameter('fos_user.firewall_name');
+
+        $user = $userManager->findUserBy(array('username' => $username));
+        $loginManager->loginUser($firewallName, $user);
+
+        $session->set('_security_'.$firewallName, serialize($container->get('security.token_storage')->getToken()));
+        $session->save();
+
+        $cookie = new Cookie($session->getName(), $session->getId());
+        $this->client->getCookieJar()->set($cookie);
+    }
+
+    /**
+     * Instead of `logInAs` this method use a HTTP request to log in the user.
+     * Could be better for some tests.
+     *
+     * @param string $username User to log in
+     */
+    public function logInAsUsingHttp($username)
     {
         $crawler = $this->client->request('GET', '/login');
         $form = $crawler->filter('button[type=submit]')->form();