Symfony\Component\DomCrawler\Tests\CrawlerTest::testFilter PHP Method

    public function testFilter()
    {
        $crawler = $this->createTestCrawler();
        $this->assertNotSame($crawler, $crawler->filter('li'), '->filter() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler', $crawler, '->filter() returns a new instance of a crawler');

        $crawler = $this->createTestCrawler()->filter('ul');

        $this->assertCount(6, $crawler->filter('li'), '->filter() filters the node list with the CSS selector');
    }