Gc\View\Helper\Document::__invoke PHP Méthode

    public function __invoke($identifier = '')
    {
        if (is_numeric($identifier)) {
            return DocumentModel::fromId($identifier);
        }
        return DocumentModel::fromUrlKey($identifier);
    }

 /**
  * Test
  *
  * @return void
  */
 public function testInvokeFromId()
 {
     $this->assertInstanceOf('Gc\\Document\\Model', $this->object->__invoke());
 }