function expectRender($arg_list)
 {
     $method = 'renderFile';
     $this->Template->expects($this->exactly(count($arg_list)))->method($method);
     foreach ($arg_list as $i => $args) {
         $method_invoker = $this->Template->expects($this->at($i))->method($method);
         $args = is_array($args) ? $args : array($args);
         $args[0] = str_replace('/', DS, $args[0]);
         // at args[0] we must have a string, the template_path
         call_user_func_array(array($method_invoker, 'with'), $args);
     }
 }