/**
  * @param array $options
  *
  * @return \ServerGrove\LocaleBundle\Extension\FlagExtension
  */
 protected function createExtension(array $options = array())
 {
     $options = array_merge(array('domains' => array(), 'defaults' => array()), $options);
     $extension = new FlagExtension($this->createContainer(), $this->createLoader($options['defaults']), 'flags.html.twig', $options['domains']);
     $twig = new \Twig_Environment(new \Twig_Loader_Filesystem(dirname(__DIR__) . '/Resources/views'));
     $extension->initRuntime($twig);
     $twig->addExtension($extension);
     $generator = $this->getMock('Symfony\\Component\\Routing\\Generator\\UrlGeneratorInterface');
     $generator->expects($this->any())->method('generate')->will($this->returnValue('/'));
     $routingExtension = new \Symfony\Bridge\Twig\Extension\RoutingExtension($generator);
     $twig->addExtension($routingExtension);
     $routingExtension->initRuntime($twig);
     return $extension;
 }