feature #18143 [DomCrawler] Exposed getter for baseHref (AAstakhov)

This PR was squashed before being merged into the 3.1-dev branch (closes #18143).

Discussion
----------

[DomCrawler] Exposed getter for baseHref

| Q             | A
| ------------- | ---
| Branch        | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #15584
| License       | MIT
| Doc PR        | n/a

I know  that PR for this issue already created, but it is Hack Day, so I'm making my first contribution anyway.

Commits
-------

53935df [DomCrawler] Exposed getter for baseHref

src/Symfony/Component/DomCrawler/Crawler.php

@@ -70,6 +70,16 @@ class Crawler implements \Countable, \IteratorAggregate
         $this->add($node);
     }
 
+    /**
+     * Returns base href.
+     *
+     * @return string
+     */
+    public function getBaseHref()
+    {
+        return $this->baseHref;
+    }
+
     /**
      * Removes all the nodes.
      */

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

@@ -27,6 +27,13 @@ class CrawlerTest extends \PHPUnit_Framework_TestCase
         $this->assertCount(1, $crawler, '__construct() takes a node as a first argument');
     }
 
+    public function testGetBaseHref()
+    {
+        $baseHref = 'http://symfony.com';
+        $crawler = new Crawler(null,  null, $baseHref);
+        $this->assertEquals($baseHref, $crawler->getBaseHref());
+    }
+
     public function testAdd()
     {
         $crawler = new Crawler();