public function instanceofFilterIsSupported()
{
$q = new FlowQuery(array($this->node));
$foundNodes = $q->children('[instanceof Neos.ContentRepository.Testing:Page]')->get();
$this->assertEquals(2, count($foundNodes));
$foundNodes = $q->children('[instanceof Neos.ContentRepository.Testing:ContentCollection]')->get();
$this->assertEquals(3, count($foundNodes));
}