Bolt\Twig\TwigExtension::htmlLang PHP Method

    public function htmlLang()
    {
        return $this->handlers['html']->htmlLang();
    }

 public function testHtmlLang()
 {
     $app = $this->getApp();
     $handlers = $this->getTwigHandlers($app);
     $handlers['html'] = $this->getMockHandler('HtmlHandler', 'htmlLang');
     $twig = new TwigExtension($app, $handlers, true);
     $twig->htmlLang();
 }