bug symfony#10987 [DomCrawler] Fixed a forgotten case of complex XPath queries (stof)

This PR was merged into the 2.3 branch.

Discussion
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[DomCrawler] Fixed a forgotten case of complex XPath queries

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#10986
| License       | MIT
| Doc PR        | n/a

This fixes the case I forgot when rewritting the XPath to avoid making it produce invalid queries. I ran the new tests against the old implementation first, to ensure they cover the BC properly.

I could have detected it by running the Mink 1.5 testsuite with the new code (which is the case for people reporting the bug), but I only ran it for Mink 1.6 which does not produce such XPath anymore.

Commits
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a9de61e [DomCrawler] Fixed a forgotten case of complex XPath queries

Author: fabpot

src/Symfony/Component/DomCrawler/Crawler.php

@@ -839,6 +839,8 @@ private function relativize($xpath)
                 $expression = $nonMatchingExpression;
             } elseif (0 === strpos($expression, '//')) {
                 $expression = 'descendant-or-self::' . substr($expression, 2);
+            } elseif (0 === strpos($expression, './/')) {
+                $expression = 'descendant-or-self::' . substr($expression, 3);
             } elseif (0 === strpos($expression, './')) {
                 $expression = 'self::' . substr($expression, 2);
             } elseif ('/' === $expression[0]) {

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

@@ -376,6 +376,8 @@ public function testFilterXpathComplexQueries()
         $this->assertCount(0, $crawler->filterXPath('/body'));
         $this->assertCount(1, $crawler->filterXPath('/_root/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'));