bug symfony#13794 [DomCrawler] Invalid uri created from forms if base tag present (danez)

This PR was squashed before being merged into the 2.3 branch (closes symfony#13794).

Discussion
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[DomCrawler] Invalid uri created from forms if base tag present

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Since symfony#13145 was merged the provided testcase does not work anymore and creates an invalid link

This affects the latest versions of 2.3, 2.5, 2.6 and 2.7

Right now this PR only includes the failing test, as I could no easy find a fix. If someone immediately knows whats the problem, give me a hint please.

Commits
-------

dc57a7a [DomCrawler] Invalid uri created from forms if base tag present

Author: fabpot

src/Symfony/Component/DomCrawler/Crawler.php

@@ -755,7 +755,7 @@ public function form(array $values = null, $method = null)
             throw new \InvalidArgumentException('The current node list is empty.');
         }
 
-        $form = new Form($this->getNode(0), $this->uri, $method);
+        $form = new Form($this->getNode(0), $this->uri, $method, $this->baseHref);
 
         if (null !== $values) {
             $form->setValues($values);

src/Symfony/Component/DomCrawler/Form.php

@@ -33,20 +33,27 @@ class Form extends Link implements \ArrayAccess
      */
     private $fields;
 
+    /**
+     * @var string
+     */
+    private $baseHref;
+
     /**
      * Constructor.
      *
      * @param \DOMNode $node       A \DOMNode instance
      * @param string   $currentUri The URI of the page where the form is embedded
      * @param string   $method     The method to use for the link (if null, it defaults to the method defined by the form)
+     * @param string   $baseHref   The URI of the <base> used for relative links, but not for empty action
      *
      * @throws \LogicException if the node is not a button inside a form tag
      *
      * @api
      */
-    public function __construct(\DOMNode $node, $currentUri, $method = null)
+    public function __construct(\DOMNode $node, $currentUri, $method = null, $baseHref = null)
     {
         parent::__construct($node, $currentUri, $method);
+        $this->baseHref = $baseHref;
 
         $this->initialize();
     }
@@ -442,6 +449,10 @@ private function initialize()
                 $this->addField($node);
             }
         }
+
+        if ($this->baseHref && '' !== $this->node->getAttribute('action')) {
+            $this->currentUri = $this->baseHref;
+        }
     }
 
     private function addField(\DOMNode $node)

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

@@ -853,9 +853,12 @@ public function testBaseTagWithForm($baseValue, $actionValue, $expectedUri, $cur
     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'),
         );
     }