Classes List

Symfony\Component\DomCrawler\Tests\CrawlerTest

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<?php

/* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */


namespace Symfony\Component\DomCrawler\Tests;

use PHPUnit\Framework\TestCase;
use Symfony\Component\DomCrawler\Crawler;

class CrawlerTest extends TestCase
{
    public function testConstructor()
    {
        $crawler = new Crawler();
        $this->assertCount(0$crawler'__construct() returns an empty crawler');

        $doc = new \DOMDocument();
        $node = $doc->createElement('test');

        $crawler = new Crawler($node);
        $this->assertCount(1$crawler'__construct() takes a node as a first argument');
    }

    public function testGetUri()
    {
        $uri = 'http://symfony.com';
        $crawler = new Crawler(null$uri);
        $this->assertEquals($uri$crawler->getUri());
    }

    public function testGetBaseHref()
    {
        $baseHref = 'http://symfony.com';
        $crawler = new Crawler(nullnull$baseHref);
        $this->assertEquals($baseHref$crawler->getBaseHref());
    }

    public function testAdd()
    {
        $crawler = new Crawler();
        $crawler->add($this->createDomDocument());
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->add() adds nodes from a \DOMDocument');

        $crawler = new Crawler();
        $crawler->add($this->createNodeList());
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->add() adds nodes from a \DOMNodeList');

        $list = array();
        foreach ($this->createNodeList() as $node) {
            $list[] = $node;
        }
        $crawler = new Crawler();
        $crawler->add($list);
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->add() adds nodes from an array of nodes');

        $crawler = new Crawler();
        $crawler->add($this->createNodeList()->item(0));
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->add() adds nodes from a \DOMNode');

        $crawler = new Crawler();
        $crawler->add('<html><body>Foo</body></html>');
        $this->assertEquals('Foo'$crawler->filterXPath('//body')->text(), '->add() adds nodes from a string');
    }

    /** * @expectedException \InvalidArgumentException */
    public function testAddInvalidType()
    {
        $crawler = new Crawler();
        $crawler->add(1);
    }

    /** * @expectedException \InvalidArgumentException * @expectedExceptionMessage Attaching DOM nodes from multiple documents in the same crawler is forbidden. */
    public function testAddMultipleDocumentNode()
    {
        $crawler = $this->createTestCrawler();
        $crawler->addHtmlContent('<html><div class="foo"></html>''UTF-8');
    }

    public function testAddHtmlContent()
    {
        $crawler = new Crawler();
        $crawler->addHtmlContent('<html><div class="foo"></html>''UTF-8');

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addHtmlContent() adds nodes from an HTML string');
    }

    public function testAddHtmlContentWithBaseTag()
    {
        $crawler = new Crawler();

        $crawler->addHtmlContent('<html><head><base href="http://symfony.com"></head><a href="/contact"></a></html>''UTF-8');

        $this->assertEquals('http://symfony.com'$crawler->filterXPath('//base')->attr('href'), '->addHtmlContent() adds nodes from an HTML string');
        $this->assertEquals('http://symfony.com/contact'$crawler->filterXPath('//a')->link()->getUri(), '->addHtmlContent() adds nodes from an HTML string');
    }

    /** * @requires extension mbstring */
    public function testAddHtmlContentCharset()
    {
        $crawler = new Crawler();
        $crawler->addHtmlContent('<html><div class="foo">Tiếng Việt</html>''UTF-8');

        $this->assertEquals('Tiếng Việt'$crawler->filterXPath('//div')->text());
    }

    public function testAddHtmlContentInvalidBaseTag()
    {
        $crawler = new Crawler(null'http://symfony.com');

        $crawler->addHtmlContent('<html><head><base target="_top"></head><a href="/contact"></a></html>''UTF-8');

        $this->assertEquals('http://symfony.com/contact'current($crawler->filterXPath('//a')->links())->getUri(), '->addHtmlContent() correctly handles a non-existent base tag href attribute');
    }

    public function testAddHtmlContentUnsupportedCharset()
    {
        $crawler = new Crawler();
        $crawler->addHtmlContent(file_get_contents(__DIR__.'/Fixtures/windows-1250.html'), 'Windows-1250');

        $this->assertEquals('Žťčýů'$crawler->filterXPath('//p')->text());
    }

    /** * @requires extension mbstring */
    public function testAddHtmlContentCharsetGbk()
    {
        $crawler = new Crawler();
        //gbk encode of <html><p>中文</p></html>
        $crawler->addHtmlContent(base64_decode('PGh0bWw+PHA+1tDOxDwvcD48L2h0bWw+'), 'gbk');

        $this->assertEquals('中文'$crawler->filterXPath('//p')->text());
    }

    public function testAddHtmlContentWithErrors()
    {
        $internalErrors = libxml_use_internal_errors(true);

        $crawler = new Crawler();
        $crawler->addHtmlContent(<<<'EOF' <!DOCTYPE html> <html> <head> </head> <body> <nav><a href="#"><a href="#"></nav> </body> </html> EOF
        , 'UTF-8');

        $errors = libxml_get_errors();
        $this->assertCount(1$errors);
        $this->assertEquals("Tag nav invalid\n"$errors[0]->message);

        libxml_clear_errors();
        libxml_use_internal_errors($internalErrors);
    }

    public function testAddXmlContent()
    {
        $crawler = new Crawler();
        $crawler->addXmlContent('<html><div class="foo"></div></html>''UTF-8');

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addXmlContent() adds nodes from an XML string');
    }

    public function testAddXmlContentCharset()
    {
        $crawler = new Crawler();
        $crawler->addXmlContent('<html><div class="foo">Tiếng Việt</div></html>''UTF-8');

        $this->assertEquals('Tiếng Việt'$crawler->filterXPath('//div')->text());
    }

    public function testAddXmlContentWithErrors()
    {
        $internalErrors = libxml_use_internal_errors(true);

        $crawler = new Crawler();
        $crawler->addXmlContent(<<<'EOF' <!DOCTYPE html> <html> <head> </head> <body> <nav><a href="#"><a href="#"></nav> </body> </html> EOF
        , 'UTF-8');

        $this->assertGreaterThan(1libxml_get_errors());

        libxml_clear_errors();
        libxml_use_internal_errors($internalErrors);
    }

    public function testAddContent()
    {
        $crawler = new Crawler();
        $crawler->addContent('<html><div class="foo"></html>''text/html; charset=UTF-8');
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addContent() adds nodes from an HTML string');

        $crawler = new Crawler();
        $crawler->addContent('<html><div class="foo"></html>''text/html; charset=UTF-8; dir=RTL');
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addContent() adds nodes from an HTML string with extended content type');

        $crawler = new Crawler();
        $crawler->addContent('<html><div class="foo"></html>');
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addContent() uses text/html as the default type');

        $crawler = new Crawler();
        $crawler->addContent('<html><div class="foo"></div></html>''text/xml; charset=UTF-8');
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addContent() adds nodes from an XML string');

        $crawler = new Crawler();
        $crawler->addContent('<html><div class="foo"></div></html>''text/xml');
        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addContent() adds nodes from an XML string');

        $crawler = new Crawler();
        $crawler->addContent('foo bar''text/plain');
        $this->assertCount(0$crawler'->addContent() does nothing if the type is not (x|ht)ml');

        $crawler = new Crawler();
        $crawler->addContent('<html><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><span>中文</span></html>');
        $this->assertEquals('中文'$crawler->filterXPath('//span')->text(), '->addContent() guess wrong charset');
    }

    /** * @requires extension iconv */
    public function testAddContentNonUtf8()
    {
        $crawler = new Crawler();
        $crawler->addContent(iconv('UTF-8''SJIS''<html><head><meta charset="Shift_JIS"></head><body>日本語</body></html>'));
        $this->assertEquals('日本語'$crawler->filterXPath('//body')->text(), '->addContent() can recognize "Shift_JIS" in html5 meta charset tag');
    }

    public function testAddDocument()
    {
        $crawler = new Crawler();
        $crawler->addDocument($this->createDomDocument());

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addDocument() adds nodes from a \DOMDocument');
    }

    public function testAddNodeList()
    {
        $crawler = new Crawler();
        $crawler->addNodeList($this->createNodeList());

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addNodeList() adds nodes from a \DOMNodeList');
    }

    public function testAddNodes()
    {
        $list = array();
        foreach ($this->createNodeList() as $node) {
            $list[] = $node;
        }

        $crawler = new Crawler();
        $crawler->addNodes($list);

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addNodes() adds nodes from an array of nodes');
    }

    public function testAddNode()
    {
        $crawler = new Crawler();
        $crawler->addNode($this->createNodeList()->item(0));

        $this->assertEquals('foo'$crawler->filterXPath('//div')->attr('class'), '->addNode() adds nodes from a \DOMNode');
    }

    public function testClear()
    {
        $doc = new \DOMDocument();
        $node = $doc->createElement('test');

        $crawler = new Crawler($node);
        $crawler->clear();
        $this->assertCount(0$crawler'->clear() removes all the nodes from the crawler');
    }

    public function testEq()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li');
        $this->assertNotSame($crawler$crawler->eq(0), '->eq() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->eq() returns a new instance of a crawler');

        $this->assertEquals('Two'$crawler->eq(1)->text(), '->eq() returns the nth node of the list');
        $this->assertCount(0$crawler->eq(100), '->eq() returns an empty crawler if the nth node does not exist');
    }

    public function testEach()
    {
        $data = $this->createTestCrawler()->filterXPath('//ul[1]/li')->each(function ($node$i) {
            return $i.'-'.$node->text();
        });

        $this->assertEquals(array('0-One''1-Two''2-Three'), $data'->each() executes an anonymous function on each node of the list');
    }

    public function testIteration()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li');

        $this->assertInstanceOf('Traversable'$crawler);
        $this->assertContainsOnlyInstancesOf('DOMElement'iterator_to_array($crawler), 'Iterating a Crawler gives DOMElement instances');
    }

    public function testSlice()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//ul[1]/li');
        $this->assertNotSame($crawler->slice(), $crawler'->slice() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler->slice(), '->slice() returns a new instance of a crawler');

        $this->assertCount(3$crawler->slice(), '->slice() does not slice the nodes in the list if any param is entered');
        $this->assertCount(1$crawler->slice(11), '->slice() slices the nodes in the list');
    }

    public function testReduce()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//ul[1]/li');
        $nodes = $crawler->reduce(function ($node$i) {
            return 1 !== $i;
        });
        $this->assertNotSame($nodes$crawler'->reduce() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$nodes'->reduce() returns a new instance of a crawler');

        $this->assertCount(2$nodes'->reduce() filters the nodes in the list');
    }

    public function testAttr()
    {
        $this->assertEquals('first'$this->createTestCrawler()->filterXPath('//li')->attr('class'), '->attr() returns the attribute of the first element of the node list');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->attr('class');
            $this->fail('->attr() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->attr() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testMissingAttrValueIsNull()
    {
        $crawler = new Crawler();
        $crawler->addContent('<html><div non-empty-attr="sample value" empty-attr=""></div></html>''text/html; charset=UTF-8');
        $div = $crawler->filterXPath('//div');

        $this->assertEquals('sample value'$div->attr('non-empty-attr'), '->attr() reads non-empty attributes correctly');
        $this->assertEquals(''$div->attr('empty-attr'), '->attr() reads empty attributes correctly');
        $this->assertNull($div->attr('missing-attr'), '->attr() reads missing attributes correctly');
    }

    public function testNodeName()
    {
        $this->assertEquals('li'$this->createTestCrawler()->filterXPath('//li')->nodeName(), '->nodeName() returns the node name of the first element of the node list');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->nodeName();
            $this->fail('->nodeName() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->nodeName() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testText()
    {
        $this->assertEquals('One'$this->createTestCrawler()->filterXPath('//li')->text(), '->text() returns the node value of the first element of the node list');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->text();
            $this->fail('->text() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->text() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testHtml()
    {
        $this->assertEquals('<img alt="Bar">'$this->createTestCrawler()->filterXPath('//a[5]')->html());
        $this->assertEquals('<input type="text" value="TextValue" name="TextName"><input type="submit" value="FooValue" name="FooName" id="FooId"><input type="button" value="BarValue" name="BarName" id="BarId"><button value="ButtonValue" name="ButtonName" id="ButtonId"></button>'trim(preg_replace('~>\s+<~''><'$this->createTestCrawler()->filterXPath('//form[@id="FooFormId"]')->html())));

        try {
            $this->createTestCrawler()->filterXPath('//ol')->html();
            $this->fail('->html() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->html() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testExtract()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//ul[1]/li');

        $this->assertEquals(array('One''Two''Three'), $crawler->extract('_text'), '->extract() returns an array of extracted data from the node list');
        $this->assertEquals(array(array('One''first'), array('Two'''), array('Three''')), $crawler->extract(array('_text''class')), '->extract() returns an array of extracted data from the node list');
        $this->assertEquals(array(array(), array(), array()), $crawler->extract(array()), '->extract() returns empty arrays if the attribute list is empty');

        $this->assertEquals(array(), $this->createTestCrawler()->filterXPath('//ol')->extract('_text'), '->extract() returns an empty array if the node list is empty');
    }

    public function testFilterXpathComplexQueries()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//body');

        $this->assertCount(0$crawler->filterXPath('/input'));
        $this->assertCount(0$crawler->filterXPath('/body'));
        $this->assertCount(1$crawler->filterXPath('./body'));
        $this->assertCount(1$crawler->filterXPath('.//body'));
        $this->assertCount(5$crawler->filterXPath('.//input'));
        $this->assertCount(4$crawler->filterXPath('//form')->filterXPath('//button | //input'));
        $this->assertCount(1$crawler->filterXPath('body'));
        $this->assertCount(6$crawler->filterXPath('//button | //input'));
        $this->assertCount(1$crawler->filterXPath('//body'));
        $this->assertCount(1$crawler->filterXPath('descendant-or-self::body'));
        $this->assertCount(1$crawler->filterXPath('//div[@id="parent"]')->filterXPath('./div'), 'A child selection finds only the current div');
        $this->assertCount(3$crawler->filterXPath('//div[@id="parent"]')->filterXPath('descendant::div'), 'A descendant selector matches the current div and its child');
        $this->assertCount(3$crawler->filterXPath('//div[@id="parent"]')->filterXPath('//div'), 'A descendant selector matches the current div and its child');
        $this->assertCount(5$crawler->filterXPath('(//a | //div)//img'));
        $this->assertCount(7$crawler->filterXPath('((//a | //div)//img | //ul)'));
        $this->assertCount(7$crawler->filterXPath('( ( //a | //div )//img | //ul )'));
        $this->assertCount(1$crawler->filterXPath("//a[./@href][((./@id = 'Klausi|Claudiu' or normalize-space(string(.)) = 'Klausi|Claudiu' or ./@title = 'Klausi|Claudiu' or ./@rel = 'Klausi|Claudiu') or .//img[./@alt = 'Klausi|Claudiu'])]"));
    }

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

        $crawler = $this->createTestCrawler()->filterXPath('//ul');
        $this->assertCount(6$crawler->filterXPath('//li'), '->filterXPath() filters the node list with the XPath expression');

        $crawler = $this->createTestCrawler();
        $this->assertCount(3$crawler->filterXPath('//body')->filterXPath('//button')->parents(), '->filterXpath() preserves parents when chained');
    }

    public function testFilterRemovesDuplicates()
    {
        $crawler = $this->createTestCrawler()->filter('html, body')->filter('li');
        $this->assertCount(6$crawler'The crawler removes duplicates when filtering.');
    }

    public function testFilterXPathWithDefaultNamespace()
    {
        $crawler = $this->createTestXmlCrawler()->filterXPath('//default:entry/default:id');
        $this->assertCount(1$crawler'->filterXPath() automatically registers a namespace');
        $this->assertSame('tag:youtube.com,2008:video:kgZRZmEc9j4'$crawler->text());
    }

    public function testFilterXPathWithCustomDefaultNamespace()
    {
        $crawler = $this->createTestXmlCrawler();
        $crawler->setDefaultNamespacePrefix('x');
        $crawler = $crawler->filterXPath('//x:entry/x:id');

        $this->assertCount(1$crawler'->filterXPath() lets to override the default namespace prefix');
        $this->assertSame('tag:youtube.com,2008:video:kgZRZmEc9j4'$crawler->text());
    }

    public function testFilterXPathWithNamespace()
    {
        $crawler = $this->createTestXmlCrawler()->filterXPath('//yt:accessControl');
        $this->assertCount(2$crawler'->filterXPath() automatically registers a namespace');
    }

    public function testFilterXPathWithMultipleNamespaces()
    {
        $crawler = $this->createTestXmlCrawler()->filterXPath('//media:group/yt:aspectRatio');
        $this->assertCount(1$crawler'->filterXPath() automatically registers multiple namespaces');
        $this->assertSame('widescreen'$crawler->text());
    }

    public function testFilterXPathWithManuallyRegisteredNamespace()
    {
        $crawler = $this->createTestXmlCrawler();
        $crawler->registerNamespace('m''http://search.yahoo.com/mrss/');

        $crawler = $crawler->filterXPath('//m:group/yt:aspectRatio');
        $this->assertCount(1$crawler'->filterXPath() uses manually registered namespace');
        $this->assertSame('widescreen'$crawler->text());
    }

    public function testFilterXPathWithAnUrl()
    {
        $crawler = $this->createTestXmlCrawler();

        $crawler = $crawler->filterXPath('//media:category[@scheme="http://gdata.youtube.com/schemas/2007/categories.cat"]');
        $this->assertCount(1$crawler);
        $this->assertSame('Music'$crawler->text());
    }

    public function testFilterXPathWithFakeRoot()
    {
        $crawler = $this->createTestCrawler();
        $this->assertCount(0$crawler->filterXPath('.'), '->filterXPath() returns an empty result if the XPath references the fake root node');
        $this->assertCount(0$crawler->filterXPath('self::*'), '->filterXPath() returns an empty result if the XPath references the fake root node');
        $this->assertCount(0$crawler->filterXPath('self::_root'), '->filterXPath() returns an empty result if the XPath references the fake root node');
    }

    public function testFilterXPathWithAncestorAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//form');

        $this->assertCount(0$crawler->filterXPath('ancestor::*'), 'The fake root node has no ancestor nodes');
    }

    public function testFilterXPathWithAncestorOrSelfAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//form');

        $this->assertCount(0$crawler->filterXPath('ancestor-or-self::*'), 'The fake root node has no ancestor nodes');
    }

    public function testFilterXPathWithAttributeAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//form');

        $this->assertCount(0$crawler->filterXPath('attribute::*'), 'The fake root node has no attribute nodes');
    }

    public function testFilterXPathWithAttributeAxisAfterElementAxis()
    {
        $this->assertCount(3$this->createTestCrawler()->filterXPath('//form/button/attribute::*'), '->filterXPath() handles attribute axes properly when they are preceded by an element filtering axis');
    }

    public function testFilterXPathWithChildAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//div[@id="parent"]');

        $this->assertCount(1$crawler->filterXPath('child::div'), 'A child selection finds only the current div');
    }

    public function testFilterXPathWithFollowingAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//a');

        $this->assertCount(0$crawler->filterXPath('following::div'), 'The fake root node has no following nodes');
    }

    public function testFilterXPathWithFollowingSiblingAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//a');

        $this->assertCount(0$crawler->filterXPath('following-sibling::div'), 'The fake root node has no following nodes');
    }

    public function testFilterXPathWithNamespaceAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//button');

        $this->assertCount(0$crawler->filterXPath('namespace::*'), 'The fake root node has no namespace nodes');
    }

    public function testFilterXPathWithNamespaceAxisAfterElementAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//div[@id="parent"]/namespace::*');

        $this->assertCount(0$crawler->filterXPath('namespace::*'), 'Namespace axes cannot be requested');
    }

    public function testFilterXPathWithParentAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//button');

        $this->assertCount(0$crawler->filterXPath('parent::*'), 'The fake root node has no parent nodes');
    }

    public function testFilterXPathWithPrecedingAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//form');

        $this->assertCount(0$crawler->filterXPath('preceding::*'), 'The fake root node has no preceding nodes');
    }

    public function testFilterXPathWithPrecedingSiblingAxis()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//form');

        $this->assertCount(0$crawler->filterXPath('preceding-sibling::*'), 'The fake root node has no preceding nodes');
    }

    public function testFilterXPathWithSelfAxes()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//a');

        $this->assertCount(0$crawler->filterXPath('self::a'), 'The fake root node has no "real" element name');
        $this->assertCount(0$crawler->filterXPath('self::a/img'), 'The fake root node has no "real" element name');
        $this->assertCount(10$crawler->filterXPath('self::*/a'));
    }

    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');
    }

    public function testFilterWithDefaultNamespace()
    {
        $crawler = $this->createTestXmlCrawler()->filter('default|entry default|id');
        $this->assertCount(1$crawler'->filter() automatically registers namespaces');
        $this->assertSame('tag:youtube.com,2008:video:kgZRZmEc9j4'$crawler->text());
    }

    public function testFilterWithNamespace()
    {
        $crawler = $this->createTestXmlCrawler()->filter('yt|accessControl');
        $this->assertCount(2$crawler'->filter() automatically registers namespaces');
    }

    public function testFilterWithMultipleNamespaces()
    {
        $crawler = $this->createTestXmlCrawler()->filter('media|group yt|aspectRatio');
        $this->assertCount(1$crawler'->filter() automatically registers namespaces');
        $this->assertSame('widescreen'$crawler->text());
    }

    public function testFilterWithDefaultNamespaceOnly()
    {
        $crawler = new Crawler('<?xml version="1.0" encoding="UTF-8"?> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> <url> <loc>http://localhost/foo</loc> <changefreq>weekly</changefreq> <priority>0.5</priority> <lastmod>2012-11-16</lastmod> </url> <url> <loc>http://localhost/bar</loc> <changefreq>weekly</changefreq> <priority>0.5</priority> <lastmod>2012-11-16</lastmod> </url> </urlset> ');

        $this->assertEquals(2$crawler->filter('url')->count());
    }

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

        $this->assertCount(1$crawler->selectLink('Fabien\'s Foo'), '->selectLink() selects links by the node values');
        $this->assertCount(1$crawler->selectLink('Fabien\'s Bar'), '->selectLink() selects links by the alt attribute of a clickable image');

        $this->assertCount(2$crawler->selectLink('Fabien"s Foo'), '->selectLink() selects links by the node values');
        $this->assertCount(2$crawler->selectLink('Fabien"s Bar'), '->selectLink() selects links by the alt attribute of a clickable image');

        $this->assertCount(1$crawler->selectLink('\' Fabien"s Foo'), '->selectLink() selects links by the node values');
        $this->assertCount(1$crawler->selectLink('\' Fabien"s Bar'), '->selectLink() selects links by the alt attribute of a clickable image');

        $this->assertCount(4$crawler->selectLink('Foo'), '->selectLink() selects links by the node values');
        $this->assertCount(4$crawler->selectLink('Bar'), '->selectLink() selects links by the node values');
    }

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

        $this->assertCount(1$crawler->selectImage('Fabien\'s Bar'), '->selectImage() selects images by alt attribute');
        $this->assertCount(2$crawler->selectImage('Fabien"s Bar'), '->selectImage() selects images by alt attribute');
        $this->assertCount(1$crawler->selectImage('\' Fabien"s Bar'), '->selectImage() selects images by alt attribute');
    }

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

        $this->assertEquals(1$crawler->selectButton('FooValue')->count(), '->selectButton() selects buttons');
        $this->assertEquals(1$crawler->selectButton('FooName')->count(), '->selectButton() selects buttons');
        $this->assertEquals(1$crawler->selectButton('FooId')->count(), '->selectButton() selects buttons');

        $this->assertEquals(1$crawler->selectButton('BarValue')->count(), '->selectButton() selects buttons');
        $this->assertEquals(1$crawler->selectButton('BarName')->count(), '->selectButton() selects buttons');
        $this->assertEquals(1$crawler->selectButton('BarId')->count(), '->selectButton() selects buttons');

        $this->assertEquals(1$crawler->selectButton('FooBarValue')->count(), '->selectButton() selects buttons with form attribute too');
        $this->assertEquals(1$crawler->selectButton('FooBarName')->count(), '->selectButton() selects buttons with form attribute too');
    }

    public function testSelectButtonWithSingleQuotesInNameAttribute()
    {
        $html = <<<'HTML' <!DOCTYPE html> <html lang="en"> <body> <div id="action"> <a href="/index.php?r=site/login">Login</a> </div> <form id="login-form" action="/index.php?r=site/login" method="post"> <button type="submit" name="Click 'Here'">Submit</button> </form> </body> </html> HTML;

        $crawler = new Crawler($html);

        $this->assertCount(1$crawler->selectButton('Click \'Here\''));
    }

    public function testSelectButtonWithDoubleQuotesInNameAttribute()
    {
        $html = <<<'HTML' <!DOCTYPE html> <html lang="en"> <body> <div id="action"> <a href="/index.php?r=site/login">Login</a> </div> <form id="login-form" action="/index.php?r=site/login" method="post"> <button type="submit" name='Click "Here"'>Submit</button> </form> </body> </html> HTML;

        $crawler = new Crawler($html);

        $this->assertCount(1$crawler->selectButton('Click "Here"'));
    }

    public function testLink()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/')->selectLink('Foo');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Link'$crawler->link(), '->link() returns a Link instance');

        $this->assertEquals('POST'$crawler->link('post')->getMethod(), '->link() takes a method as its argument');

        $crawler = $this->createTestCrawler('http://example.com/bar')->selectLink('GetLink');
        $this->assertEquals('http://example.com/bar?get=param'$crawler->link()->getUri(), '->link() returns a Link instance');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->link();
            $this->fail('->link() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->link() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    /** * @expectedException \InvalidArgumentException * @expectedExceptionMessage The selected node should be instance of DOMElement */
    public function testInvalidLink()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/');
        $crawler->filterXPath('//li/text()')->link();
    }

    /** * @expectedException \InvalidArgumentException * @expectedExceptionMessage The selected node should be instance of DOMElement */
    public function testInvalidLinks()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/');
        $crawler->filterXPath('//li/text()')->link();
    }

    public function testImage()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/')->selectImage('Bar');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Image'$crawler->image(), '->image() returns an Image instance');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->image();
            $this->fail('->image() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->image() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testSelectLinkAndLinkFiltered()
    {
        $html = <<<'HTML' <!DOCTYPE html> <html lang="en"> <body> <div id="action"> <a href="/index.php?r=site/login">Login</a> </div> <form id="login-form" action="/index.php?r=site/login" method="post"> <button type="submit">Submit</button> </form> </body> </html> HTML;

        $crawler = new Crawler($html);
        $filtered = $crawler->filterXPath("descendant-or-self::*[@id = 'login-form']");

        $this->assertCount(0$filtered->selectLink('Login'));
        $this->assertCount(1$filtered->selectButton('Submit'));

        $filtered = $crawler->filterXPath("descendant-or-self::*[@id = 'action']");

        $this->assertCount(1$filtered->selectLink('Login'));
        $this->assertCount(0$filtered->selectButton('Submit'));

        $this->assertCount(1$crawler->selectLink('Login')->selectLink('Login'));
        $this->assertCount(1$crawler->selectButton('Submit')->selectButton('Submit'));
    }

    public function testChaining()
    {
        $crawler = new Crawler('<div name="a"><div name="b"><div name="c"></div></div></div>');

        $this->assertEquals('a'$crawler->filterXPath('//div')->filterXPath('div')->filterXPath('div')->attr('name'));
    }

    public function testLinks()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/')->selectLink('Foo');
        $this->assertInternalType('array'$crawler->links(), '->links() returns an array');

        $this->assertCount(4$crawler->links(), '->links() returns an array');
        $links = $crawler->links();
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Link'$links[0], '->links() returns an array of Link instances');

        $this->assertEquals(array(), $this->createTestCrawler()->filterXPath('//ol')->links(), '->links() returns an empty array if the node selection is empty');
    }

    public function testImages()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/')->selectImage('Bar');
        $this->assertInternalType('array'$crawler->images(), '->images() returns an array');

        $this->assertCount(4$crawler->images(), '->images() returns an array');
        $images = $crawler->images();
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Image'$images[0], '->images() returns an array of Image instances');

        $this->assertEquals(array(), $this->createTestCrawler()->filterXPath('//ol')->links(), '->links() returns an empty array if the node selection is empty');
    }

    public function testForm()
    {
        $testCrawler = $this->createTestCrawler('http://example.com/bar/');
        $crawler = $testCrawler->selectButton('FooValue');
        $crawler2 = $testCrawler->selectButton('FooBarValue');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Form'$crawler->form(), '->form() returns a Form instance');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Form'$crawler2->form(), '->form() returns a Form instance');

        $this->assertEquals($crawler->form()->getFormNode()->getAttribute('id'), $crawler2->form()->getFormNode()->getAttribute('id'), '->form() works on elements with form attribute');

        $this->assertEquals(array('FooName' => 'FooBar''TextName' => 'TextValue''FooTextName' => 'FooTextValue'), $crawler->form(array('FooName' => 'FooBar'))->getValues(), '->form() takes an array of values to submit as its first argument');
        $this->assertEquals(array('FooName' => 'FooValue''TextName' => 'TextValue''FooTextName' => 'FooTextValue'), $crawler->form()->getValues(), '->getValues() returns correct form values');
        $this->assertEquals(array('FooBarName' => 'FooBarValue''TextName' => 'TextValue''FooTextName' => 'FooTextValue'), $crawler2->form()->getValues(), '->getValues() returns correct form values');

        try {
            $this->createTestCrawler()->filterXPath('//ol')->form();
            $this->fail('->form() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->form() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    /** * @expectedException \InvalidArgumentException * @expectedExceptionMessage The selected node should be instance of DOMElement */
    public function testInvalidForm()
    {
        $crawler = $this->createTestCrawler('http://example.com/bar/');
        $crawler->filterXPath('//li/text()')->form();
    }

    public function testLast()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//ul[1]/li');
        $this->assertNotSame($crawler$crawler->last(), '->last() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->last() returns a new instance of a crawler');

        $this->assertEquals('Three'$crawler->last()->text());
    }

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

        $this->assertEquals('One'$crawler->first()->text());
    }

    public function testSiblings()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li')->eq(1);
        $this->assertNotSame($crawler$crawler->siblings(), '->siblings() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->siblings() returns a new instance of a crawler');

        $nodes = $crawler->siblings();
        $this->assertEquals(2$nodes->count());
        $this->assertEquals('One'$nodes->eq(0)->text());
        $this->assertEquals('Three'$nodes->eq(1)->text());

        $nodes = $this->createTestCrawler()->filterXPath('//li')->eq(0)->siblings();
        $this->assertEquals(2$nodes->count());
        $this->assertEquals('Two'$nodes->eq(0)->text());
        $this->assertEquals('Three'$nodes->eq(1)->text());

        try {
            $this->createTestCrawler()->filterXPath('//ol')->siblings();
            $this->fail('->siblings() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->siblings() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testNextAll()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li')->eq(1);
        $this->assertNotSame($crawler$crawler->nextAll(), '->nextAll() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->nextAll() returns a new instance of a crawler');

        $nodes = $crawler->nextAll();
        $this->assertEquals(1$nodes->count());
        $this->assertEquals('Three'$nodes->eq(0)->text());

        try {
            $this->createTestCrawler()->filterXPath('//ol')->nextAll();
            $this->fail('->nextAll() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->nextAll() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testPreviousAll()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li')->eq(2);
        $this->assertNotSame($crawler$crawler->previousAll(), '->previousAll() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->previousAll() returns a new instance of a crawler');

        $nodes = $crawler->previousAll();
        $this->assertEquals(2$nodes->count());
        $this->assertEquals('Two'$nodes->eq(0)->text());

        try {
            $this->createTestCrawler()->filterXPath('//ol')->previousAll();
            $this->fail('->previousAll() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->previousAll() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    public function testChildren()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//ul');
        $this->assertNotSame($crawler$crawler->children(), '->children() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->children() returns a new instance of a crawler');

        $nodes = $crawler->children();
        $this->assertEquals(3$nodes->count());
        $this->assertEquals('One'$nodes->eq(0)->text());
        $this->assertEquals('Two'$nodes->eq(1)->text());
        $this->assertEquals('Three'$nodes->eq(2)->text());

        try {
            $this->createTestCrawler()->filterXPath('//ol')->children();
            $this->fail('->children() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->children() throws an \InvalidArgumentException if the node list is empty');
        }

        try {
            $crawler = new Crawler('<p></p>');
            $crawler->filter('p')->children();
            $this->assertTrue(true'->children() does not trigger a notice if the node has no children');
        } catch (\PHPUnit\Framework\Error\Notice $e) {
            $this->fail('->children() does not trigger a notice if the node has no children');
        } catch (\PHPUnit_Framework_Error_Notice $e) {
            $this->fail('->children() does not trigger a notice if the node has no children');
        }
    }

    public function testParents()
    {
        $crawler = $this->createTestCrawler()->filterXPath('//li[1]');
        $this->assertNotSame($crawler$crawler->parents(), '->parents() returns a new instance of a crawler');
        $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler'$crawler'->parents() returns a new instance of a crawler');

        $nodes = $crawler->parents();
        $this->assertEquals(3$nodes->count());

        $nodes = $this->createTestCrawler()->filterXPath('//html')->parents();
        $this->assertEquals(0$nodes->count());

        try {
            $this->createTestCrawler()->filterXPath('//ol')->parents();
            $this->fail('->parents() throws an \InvalidArgumentException if the node list is empty');
        } catch (\InvalidArgumentException $e) {
            $this->assertTrue(true'->parents() throws an \InvalidArgumentException if the node list is empty');
        }
    }

    /** * @dataProvider getBaseTagData */
    public function testBaseTag($baseValue$linkValue$expectedUri$currentUri = null$description = null)
    {
        $crawler = new Crawler('<html><base href="'.$baseValue.'"><a href="'.$linkValue.'"></a></html>'$currentUri);
        $this->assertEquals($expectedUri$crawler->filterXPath('//a')->link()->getUri(), $description);
    }

    public function getBaseTagData()
    {
        return array(
            array('http://base.com''link''http://base.com/link'),
            array('//base.com''link''https://base.com/link''https://domain.com''<base> tag can use a schema-less URL'),
            array('path/''link''https://domain.com/path/link''https://domain.com''<base> tag can set a path'),
            array('http://base.com''#''http://base.com#''http://domain.com/path/link''<base> tag does work with links to an anchor'),
            array('http://base.com''''http://base.com''http://domain.com/path/link''<base> tag does work with empty links'),
        );
    }

    /** * @dataProvider getBaseTagWithFormData */
    public function testBaseTagWithForm($baseValue$actionValue$expectedUri$currentUri = null$description = null)
    {
        $crawler = new Crawler('<html><base href="'.$baseValue.'"><form method="post" action="'.$actionValue.'"><button type="submit" name="submit"/></form></html>'$currentUri);
        $this->assertEquals($expectedUri$crawler->filterXPath('//button')->form()->getUri(), $description);
    }

    public function getBaseTagWithFormData()
    {
        return array(
            array('https://base.com/''link/''https://base.com/link/''https://base.com/link/''<base> tag does work with a path and relative form action'),
            array('/basepath''/registration''http://domain.com/registration''http://domain.com/registration''<base> tag does work with a path and form action'),
            array('/basepath''''http://domain.com/registration''http://domain.com/registration''<base> tag does work with a path and empty form action'),
            array('http://base.com/''/registration''http://base.com/registration''http://domain.com/registration''<base> tag does work with a URL and form action'),
            array('http://base.com''''http://domain.com/path/form''http://domain.com/path/form''<base> tag does work with a URL and an empty form action'),
            array('http://base.com/path''/registration''http://base.com/registration''http://domain.com/path/form''<base> tag does work with a URL and form action'),
        );
    }

    public function testCountOfNestedElements()
    {
        $crawler = new Crawler('<html><body><ul><li>List item 1<ul><li>Sublist item 1</li><li>Sublist item 2</ul></li></ul></body></html>');

        $this->assertCount(1$crawler->filter('li:contains("List item 1")'));
    }

    public function testEvaluateReturnsTypedResultOfXPathExpressionOnADocumentSubset()
    {
        $crawler = $this->createTestCrawler();

        $result = $crawler->filterXPath('//form/input')->evaluate('substring-before(@name, "Name")');

        $this->assertSame(array('Text''Foo''Bar'), $result);
    }

    public function testEvaluateReturnsTypedResultOfNamespacedXPathExpressionOnADocumentSubset()
    {
        $crawler = $this->createTestXmlCrawler();

        $result = $crawler->filterXPath('//yt:accessControl/@action')->evaluate('string(.)');

        $this->assertSame(array('comment''videoRespond'), $result);
    }

    public function testEvaluateReturnsTypedResultOfNamespacedXPathExpression()
    {
        $crawler = $this->createTestXmlCrawler();
        $crawler->registerNamespace('youtube''http://gdata.youtube.com/schemas/2007');

        $result = $crawler->evaluate('string(//youtube:accessControl/@action)');

        $this->assertSame(array('comment'), $result);
    }

    public function testEvaluateReturnsACrawlerIfXPathExpressionEvaluatesToANode()
    {
        $crawler = $this->createTestCrawler()->evaluate('//form/input[1]');

        $this->assertInstanceOf(Crawler::class$crawler);
        $this->assertCount(1$crawler);
        $this->assertSame('input'$crawler->first()->nodeName());
    }

    /** * @expectedException \LogicException */
    public function testEvaluateThrowsAnExceptionIfDocumentIsEmpty()
    {
        (new Crawler())->evaluate('//form/input[1]');
    }

    public function createTestCrawler($uri = null)
    {
        $dom = new \DOMDocument();
        $dom->loadHTML(' <html> <body> <a href="foo">Foo</a> <a href="/foo"> Fabien\'s Foo </a> <a href="/foo">Fabien"s Foo</a> <a href="/foo">\' Fabien"s Foo</a> <a href="/bar"><img alt="Bar"/></a> <a href="/bar"><img alt=" Fabien\'s Bar "/></a> <a href="/bar"><img alt="Fabien&quot;s Bar"/></a> <a href="/bar"><img alt="\' Fabien&quot;s Bar"/></a> <a href="?get=param">GetLink</a> <a href="/example">Klausi|Claudiu</a> <form action="foo" id="FooFormId"> <input type="text" value="TextValue" name="TextName" /> <input type="submit" value="FooValue" name="FooName" id="FooId" /> <input type="button" value="BarValue" name="BarName" id="BarId" /> <button value="ButtonValue" name="ButtonName" id="ButtonId" /> </form> <input type="submit" value="FooBarValue" name="FooBarName" form="FooFormId" /> <input type="text" value="FooTextValue" name="FooTextName" form="FooFormId" /> <ul class="first"> <li class="first">One</li> <li>Two</li> <li>Three</li> </ul> <ul> <li>One Bis</li> <li>Two Bis</li> <li>Three Bis</li> </ul> <div id="parent"> <div id="child"></div> <div id="child2" xmlns:foo="http://example.com"></div> </div> <div id="sibling"><img /></div> </body> </html> ');

        return new Crawler($dom$uri);
    }

    protected function createTestXmlCrawler($uri = null)
    {
        $xml = '<?xml version="1.0" encoding="UTF-8"?> <entry xmlns="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss/" xmlns:yt="http://gdata.youtube.com/schemas/2007"> <id>tag:youtube.com,2008:video:kgZRZmEc9j4</id> <yt:accessControl action="comment" permission="allowed"/> <yt:accessControl action="videoRespond" permission="moderated"/> <media:group> <media:title type="plain">Chordates - CrashCourse Biology #24</media:title> <yt:aspectRatio>widescreen</yt:aspectRatio> </media:group> <media:category label="Music" scheme="http://gdata.youtube.com/schemas/2007/categories.cat">Music</media:category> </entry>';

        return new Crawler($xml$uri);
    }

    protected function createDomDocument()
    {
        $dom = new \DOMDocument();
        $dom->loadXML('<html><div class="foo"></div></html>');

        return $dom;
    }

    protected function createNodeList()
    {
        $dom = new \DOMDocument();
        $dom->loadXML('<html><div class="foo"></div></html>');
        $domxpath = new \DOMXPath($dom);

        return $domxpath->query('//div');
    }
}