public function testGetType()
{
$document = new Document();
$this->assertNull($document->getType());
$html = $this->loadFixture('posts.html');
$document = new Document($html);
$this->assertEquals('html', $document->getType());
$xml = $this->loadFixture('books.xml');
$document = new Document($xml, false, 'UTF-8', 'xml');
$this->assertEquals('xml', $document->getType());
}