function test_is_redirection()
 {
     $this->assertFalse(No2_HTTP::is_redirection(299));
     // before inf limit
     $this->assertTrue(No2_HTTP::is_redirection(301));
     // inferior limit
     $this->assertTrue(No2_HTTP::is_redirection(304));
     // mid.
     $this->assertTrue(No2_HTTP::is_redirection(308));
     // superior limit
     $this->assertFalse(No2_HTTP::is_redirection(400));
     // after sup limit
 }
 /**
  * redirect to the given location.
  *
  *
  * This method is designed to be called from the controller.
  *
  * @param $location
  *   An URI string, the location to redirect to.
  *
  * @param $status
  *   The HTTP status code. It should be a redirect status code. The default
  *   is 303 See Other as this method is intended to be used by action
  *   methods modifying the database by POST requests.
  *   (see http://en.wikipedia.org/wiki/HTTP_303)
  */
 public function redirect_to($location, $status = No2_HTTP::SEE_OTHER)
 {
     if (No2_HTTP::is_redirection($status)) {
         $this->set_status($status);
     }
     $this->__redirect_location = $location;
     // prepare the flash for the next call.
     if (session_active()) {
         $_SESSION['_no2_flash'] = $this->flash;
     }
 }