public function testConstruct()
{
$url = new Url();
$url->setUrl('http://jwage.com');
$this->assertEquals('http://jwage.com/', $url->getUrl());
$this->assertInstanceOf('Purl\\Parser', $url->getParser());
$parser = new TestParser();
$url = new Url('http://jwage.com', $parser);
$this->assertSame($parser, $url->getParser());
}