Bolt\Twig\Handler\AdminHandler::testStackable PHP Метод

    public function testStackable($filename)
    {
        $stacked = $this->app['stack']->isStackable($filename);
        return $stacked;
    }

 public function testStackable()
 {
     $app = $this->getApp();
     $stack = $this->getMockStack();
     $stack->expects($this->once())->method('isStackable');
     $app['stack'] = $stack;
     $handler = new AdminHandler($app);
     $handler->testStackable('koala.jpg');
 }