Allow basic auth in url.

Improve regex. Add tests.

src/Symfony/Component/Validator/Constraints/UrlValidator.php

@@ -24,6 +24,7 @@ class UrlValidator extends ConstraintValidator
 {
     const PATTERN = '~^
             (%s)://                                 # protocol
+            (([\pL\pN-]+:)?([\pL\pN-]+)@)?          # basic auth
             (
                 ([\pL\pN\pS-\.])+(\.?([\pL]|xn\-\-[\pL\pN-]+)+\.?) # a domain name
                     |                                              # or

src/Symfony/Component/Validator/Tests/Constraints/UrlValidatorTest.php

@@ -116,6 +116,8 @@ class UrlValidatorTest extends \PHPUnit_Framework_TestCase
             array('http://xn--espaa-rta.xn--ca-ol-fsay5a/'),
             array('http://xn--d1abbgf6aiiy.xn--p1ai/'),
             array('http://☎.com/'),
+            array('http://username:password@symfony.com'),
+            array('http://user-name@symfony.com'),
         );
     }
 
@@ -155,6 +157,10 @@ class UrlValidatorTest extends \PHPUnit_Framework_TestCase
             array('ftp://[::1]/'),
             array('http://[::1'),
             array('http://hello.☎/'),
+            array('http://:password@symfony.com'),
+            array('http://:password@@symfony.com'),
+            array('http://username:passwordsymfony.com'),
+            array('http://usern@me:password@symfony.com'),
         );
     }