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Commit3148fad

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[DomCrawler] Add support for XPath expression evaluation
1 parent695549f commit3148fad

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2 files changed

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2 files changed

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‎src/Symfony/Component/DomCrawler/Crawler.php‎

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Original file line numberDiff line numberDiff line change
@@ -592,6 +592,36 @@ public function html()
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return$html;
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}
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/**
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* Evaluates an XPath expression.
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*
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* Since an XPath expression might evaluate to either a simple type or a \DOMDoneList,
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* this method will return either an array of simple types or a new Crawler instance.
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*
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* @param string $xpath An XPath expression
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*
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* @return array|Crawler An array of evaluation results or a new Crawler instance
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*/
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publicfunctionevaluate($xpath)
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{
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if (null ===$this->document) {
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thrownew \LogicException('Cannot evaluate the expression on an uninitialized crawler.');
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}
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$data =array();
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$domxpath =$this->createDOMXPath($this->document,$this->findNamespacePrefixes($xpath));
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foreach ($this->nodesas$node) {
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$data[] =$domxpath->evaluate($xpath,$node);
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}
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if (isset($data[0]) &&$data[0]instanceof \DOMNodeList) {
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return$this->createSubCrawler($data);
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}
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return$data;
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}
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/**
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* Extracts information from the list of nodes.
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*

‎src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php‎

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Original file line numberDiff line numberDiff line change
@@ -1061,6 +1061,51 @@ public function testCountOfNestedElements()
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$this->assertCount(1,$crawler->filter('li:contains("List item 1")'));
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}
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publicfunctiontestEvaluateReturnsTypedResultOfXPathExpressionOnADocumentSubset()
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{
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$crawler =$this->createTestCrawler();
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$result =$crawler->filterXPath('//form/input')->evaluate('substring-before(@name, "Name")');
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$this->assertSame(array('Text','Foo','Bar'),$result);
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}
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publicfunctiontestEvaluateReturnsTypedResultOfNamespacedXPathExpressionOnADocumentSubset()
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{
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$crawler =$this->createTestXmlCrawler();
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$result =$crawler->filterXPath('//yt:accessControl/@action')->evaluate('string(.)');
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$this->assertSame(array('comment','videoRespond'),$result);
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}
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publicfunctiontestEvaluateReturnsTypedResultOfNamespacedXPathExpression()
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{
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$crawler =$this->createTestXmlCrawler();
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$crawler->registerNamespace('youtube','http://gdata.youtube.com/schemas/2007');
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$result =$crawler->evaluate('string(//youtube:accessControl/@action)');
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$this->assertSame(array('comment'),$result);
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}
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publicfunctiontestEvaluateReturnsACrawlerIfXPathExpressionEvaluatesToANode()
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{
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$crawler =$this->createTestCrawler()->evaluate('//form/input[1]');
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$this->assertInstanceOf(Crawler::class,$crawler);
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$this->assertCount(1,$crawler);
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$this->assertSame('input',$crawler->first()->nodeName());
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}
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/**
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* @expectedException \LogicException
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*/
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publicfunctiontestEvaluateThrowsAnExceptionIfDocumentIsEmpty()
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{
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(newCrawler())->evaluate('//form/input[1]');
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}
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publicfunctioncreateTestCrawler($uri =null)
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{
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$dom =new \DOMDocument();

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