/**
* niszczenie obiektów
*/
public function testUnset()
{
$head = new HtmlElement('head');
$script = new HtmlElement('script');
$head->insert($script);
$script->destroy($script);
$this->assertEquals(0, $head->xpath('script')->length);
$head->destroy($head);
$h = new HtmlElement('head');
$h->insert(new HtmlElement('script'));
$h->insert(new HtmlElement('script'));
$h->insert(new HtmlElement('script'));
$this->helpTest1($h);
$h->destroy($h);
}