public function testIsCommentNode()
{
$element = new Element('div');
$element->setInnerHtml(' Foo <span>Bar</span><!-- Baz -->');
$children = $element->children();
$this->assertFalse($children[0]->isCommentNode());
$this->assertFalse($children[1]->isCommentNode());
$this->assertTrue($children[2]->isCommentNode());
}