[DomCrawler] fix the axes handling in a bc way
The previous fix in #11548 for handling XPath axes was not backward compatible. In previous Symfony versions the Crawler handled nodes by holding a "fake root node". This must be taken into account when evaluating (relativizing) XPath expressions.
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@ -245,9 +245,11 @@ class Crawler extends \SplObjectStorage
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public function addNodeList(\DOMNodeList $nodes)
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{
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foreach ($nodes as $node) {
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if ($node instanceof \DOMNode) {
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$this->addNode($node);
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}
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}
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}
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/**
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* Adds an array of \DOMNode instances to the list of nodes.
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@ -834,6 +836,8 @@ class Crawler extends \SplObjectStorage
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// BC for Symfony 2.4 and lower were elements were adding in a fake _root parent
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if (0 === strpos($expression, '/_root/')) {
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$expression = './'.substr($expression, 7);
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} elseif (0 === strpos($expression, 'self::*/')) {
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$expression = './'.substr($expression, 8);
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}
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// add prefix before absolute element selector
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@ -845,7 +849,9 @@ class Crawler extends \SplObjectStorage
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$expression = 'descendant-or-self::'.substr($expression, 3);
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} elseif (0 === strpos($expression, './')) {
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$expression = 'self::'.substr($expression, 2);
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} elseif ('/' === $expression[0]) {
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} elseif (0 === strpos($expression, 'child::')) {
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$expression = 'self::'.substr($expression, 7);
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} elseif ('/' === $expression[0] || 0 === strpos($expression, 'self::')) {
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// the only direct child in Symfony 2.4 and lower is _root, which is already handled previously
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// so let's drop the expression entirely
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$expression = $nonMatchingExpression;
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@ -854,7 +860,10 @@ class Crawler extends \SplObjectStorage
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$expression = $nonMatchingExpression;
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} elseif (0 === strpos($expression, 'descendant::')) {
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$expression = 'descendant-or-self::'.substr($expression, strlen('descendant::'));
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} elseif (!preg_match('/^(ancestor|ancestor-or-self|attribute|child|descendant-or-self|following|following-sibling|parent|preceding|preceding-sibling|self)::/', $expression)) {
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} elseif (preg_match('/^(ancestor|ancestor-or-self|attribute|following|following-sibling|namespace|parent|preceding|preceding-sibling)::/', $expression)) {
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// the fake root has no parent, preceding or following nodes and also no attributes (even no namespace attributes)
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$expression = $nonMatchingExpression;
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} elseif (0 !== strpos($expression, 'descendant-or-self::')) {
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$expression = 'self::'.$expression;
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}
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$expressions[] = $parenthesis.$expression;
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@ -388,8 +388,8 @@ EOF
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$this->assertCount(1, $crawler->filterXPath('//body'));
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$this->assertCount(1, $crawler->filterXPath('descendant-or-self::body'));
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$this->assertCount(1, $crawler->filterXPath('//div[@id="parent"]')->filterXPath('./div'), 'A child selection finds only the current div');
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$this->assertCount(2, $crawler->filterXPath('//div[@id="parent"]')->filterXPath('descendant::div'), 'A descendant selector matches the current div and its child');
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$this->assertCount(2, $crawler->filterXPath('//div[@id="parent"]')->filterXPath('//div'), 'A descendant selector matches the current div and its child');
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$this->assertCount(3, $crawler->filterXPath('//div[@id="parent"]')->filterXPath('descendant::div'), 'A descendant selector matches the current div and its child');
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$this->assertCount(3, $crawler->filterXPath('//div[@id="parent"]')->filterXPath('//div'), 'A descendant selector matches the current div and its child');
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$this->assertCount(5, $crawler->filterXPath('(//a | //div)//img'));
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$this->assertCount(7, $crawler->filterXPath('((//a | //div)//img | //ul)'));
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$this->assertCount(7, $crawler->filterXPath('( ( //a | //div )//img | //ul )'));
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@ -411,72 +411,104 @@ EOF
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$this->assertCount(3, $crawler->filterXPath('//body')->filterXPath('//button')->parents(), '->filterXpath() preserves parents when chained');
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}
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public function testFilterXPathWithFakeRoot()
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{
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$crawler = $this->createTestCrawler();
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$this->assertCount(0, $crawler->filterXPath('.'), '->filterXPath() returns an empty result if the XPath references the fake root node');
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$this->assertCount(0, $crawler->filterXPath('/_root'), '->filterXPath() returns an empty result if the XPath references the fake root node');
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$this->assertCount(0, $crawler->filterXPath('self::*'), '->filterXPath() returns an empty result if the XPath references the fake root node');
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$this->assertCount(0, $crawler->filterXPath('self::_root'), '->filterXPath() returns an empty result if the XPath references the fake root node');
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}
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public function testFilterXPathWithAncestorAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//form');
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$this->assertCount(2, $crawler->filterXPath('ancestor::*'));
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$this->assertCount(0, $crawler->filterXPath('ancestor::*'), 'The fake root node has no ancestor nodes');
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}
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public function testFilterXPathWithAncestorOrSelfAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//form');
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$this->assertCount(3, $crawler->filterXPath('ancestor-or-self::*'));
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$this->assertCount(0, $crawler->filterXPath('ancestor-or-self::*'), 'The fake root node has no ancestor nodes');
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}
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public function testFilterXPathWithAttributeAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//form');
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$this->assertCount(2, $crawler->filterXPath('attribute::*'));
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$this->assertCount(0, $crawler->filterXPath('attribute::*'), 'The fake root node has no attribute nodes');
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}
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public function testFilterXPathWithAttributeAxisAfterElementAxis()
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{
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$this->assertCount(3, $this->createTestCrawler()->filterXPath('//form/button/attribute::*'), '->filterXPath() handles attribute axes properly when they are preceded by an element filtering axis');
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}
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public function testFilterXPathWithChildAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//body');
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$crawler = $this->createTestCrawler()->filterXPath('//div[@id="parent"]');
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$this->assertCount(2, $crawler->filterXPath('child::input'));
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$this->assertCount(1, $crawler->filterXPath('child::div'), 'A child selection finds only the current div');
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}
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public function testFilterXPathWithFollowingAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//a');
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$this->assertCount(3, $crawler->filterXPath('following::div'));
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$this->assertCount(0, $crawler->filterXPath('following::div'), 'The fake root node has no following nodes');
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}
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public function testFilterXPathWithFollowingSiblingAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//a');
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$this->assertCount(2, $crawler->filterXPath('following-sibling::div'));
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$this->assertCount(0, $crawler->filterXPath('following-sibling::div'), 'The fake root node has no following nodes');
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}
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public function testFilterXPathWithNamespaceAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//button');
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$this->assertCount(0, $crawler->filterXPath('namespace::*'), 'The fake root node has no namespace nodes');
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}
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public function testFilterXPathWithNamespaceAxisAfterElementAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//div[@id="parent"]/namespace::*');
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$this->assertCount(0, $crawler->filterXPath('namespace::*'), 'Namespace axes cannot be requested');
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}
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public function testFilterXPathWithParentAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//button');
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$this->assertEquals('foo', $crawler->filterXPath('parent::*')->attr('action'));
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$this->assertCount(0, $crawler->filterXPath('parent::*'), 'The fake root node has no parent nodes');
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}
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public function testFilterXPathWithPrecedingAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//form');
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$this->assertCount(13, $crawler->filterXPath('preceding::*'));
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$this->assertCount(0, $crawler->filterXPath('preceding::*'), 'The fake root node has no preceding nodes');
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}
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public function testFilterXPathWithPrecedingSiblingAxis()
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{
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$crawler = $this->createTestCrawler()->filterXPath('//form');
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$this->assertCount(9, $crawler->filterXPath('preceding-sibling::*'));
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$this->assertCount(0, $crawler->filterXPath('preceding-sibling::*'), 'The fake root node has no preceding nodes');
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}
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public function testFilterXPathWithSelfAxes()
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{
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$this->assertCount(1, $this->createTestCrawler()->filterXPath('self::*'));
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$crawler = $this->createTestCrawler()->filterXPath('//a');
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$this->assertCount(0, $crawler->filterXPath('self::a'), 'The fake root node has no "real" element name');
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$this->assertCount(0, $crawler->filterXPath('self::a/img'), 'The fake root node has no "real" element name');
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$this->assertCount(9, $crawler->filterXPath('self::*/a'));
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}
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/**
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@ -844,6 +876,7 @@ HTML;
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</ul>
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<div id="parent">
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<div id="child"></div>
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<div id="child2" xmlns:foo="http://example.com"></div>
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</div>
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<div id="sibling"><img /></div>
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</body>
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