/**
* @covers Wa72\HtmlPageDom\HtmlPageCrawler::isHtmlDocument
*/
public function testIsHtmlDocument()
{
$dom = new \DOMDocument('1.0', 'UTF-8');
$dom->loadHTML('<!DOCTYPE html><html><body><div id="content"><h1>Title</h1></div></body></html>');
$c = new HtmlPageCrawler($dom);
$this->assertTrue($c->isHtmlDocument());
$t = $c->filter('body');
$this->assertFalse($t->isHtmlDocument());
$c = new HtmlPageCrawler('<div id="content"><h1>Title</h1></div>');
$this->assertFalse($c->isHtmlDocument());
$c = new HtmlPageCrawler('<html><body><div id="content"><h1>Title</h1></div></body></html>');
$this->assertTrue($c->isHtmlDocument());
}
