public function testCountable()
{
$div = new Tag('div');
$div->setAttributes(['class' => ['value' => 'all', 'doubleQuote' => true]]);
$a = new Tag('a');
$a->setAttributes(['href' => ['value' => 'http://google.com', 'doubleQuote' => false]]);
$br = new Tag('br');
$br->selfClosing();
$parent = new HtmlNode($div);
$childa = new HtmlNode($a);
$childbr = new HtmlNode($br);
$parent->addChild($childa);
$parent->addChild($childbr);
$childa->addChild(new TextNode('link'));
$this->assertEquals(count($parent->getChildren()), count($parent));
}
