From 27064127ad2f31af4ee6f91785e5f1c45d02e16b Mon Sep 17 00:00:00 2001
From: Tobias Schultze <webmaster@tubo-world.de>
Date: Mon, 9 Apr 2012 09:26:53 +0200
Subject: [PATCH] fixed random function when charset is null

---
 lib/Twig/Extension/Core.php            |    5 +++++
 test/Twig/Tests/ErrorTest.php          |    2 +-
 test/Twig/Tests/Extension/CoreTest.php |    1 +
 3 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/lib/Twig/Extension/Core.php b/lib/Twig/Extension/Core.php
index 78787d8..e241504 100644
--- a/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@ -313,6 +313,8 @@ function twig_cycle($values, $i)
  * @param Twig_Environment             $env    A Twig_Environment instance
  * @param Traversable|array|int|string $values The values to pick a random item from
  *
+ * @throws Twig_Error_Runtime When $values is an empty array (does not apply to an empty string which is returned as is).
+ *
  * @return mixed A random value from the given sequence
  */
 function twig_random(Twig_Environment $env, $values = null)
@@ -328,6 +330,9 @@ function twig_random(Twig_Environment $env, $values = null)
     if ($values instanceof Traversable) {
         $values = iterator_to_array($values);
     } elseif (is_string($values)) {
+        if ('' === $values) {
+            return '';
+        }
         if (null !== $charset = $env->getCharset()) {
             if ('UTF-8' != $charset) {
                 $values = twig_convert_encoding($values, 'UTF-8', $charset);
diff --git a/test/Twig/Tests/ErrorTest.php b/test/Twig/Tests/ErrorTest.php
index 45d4053..978ee80 100644
--- a/test/Twig/Tests/ErrorTest.php
+++ b/test/Twig/Tests/ErrorTest.php
@@ -16,7 +16,7 @@ class Twig_Tests_ErrorTest extends PHPUnit_Framework_TestCase
         $error = new Twig_Error('foo');
         $error->setTemplateFile(new SplFileInfo(__FILE__));
 
-        $this->assertContains('test/Twig/Tests/ErrorTest.php', $error->getMessage());
+        $this->assertContains('test'.DIRECTORY_SEPARATOR.'Twig'.DIRECTORY_SEPARATOR.'Tests'.DIRECTORY_SEPARATOR.'ErrorTest.php', $error->getMessage());
     }
 
     public function testErrorWithArrayFilename()
diff --git a/test/Twig/Tests/Extension/CoreTest.php b/test/Twig/Tests/Extension/CoreTest.php
index 89a7750..77a8101 100644
--- a/test/Twig/Tests/Extension/CoreTest.php
+++ b/test/Twig/Tests/Extension/CoreTest.php
@@ -68,6 +68,7 @@ class Twig_Tests_Extension_CoreTest extends PHPUnit_Framework_TestCase
     public function testRandomFunctionReturnsAsIs()
     {
         $this->assertSame('', twig_random(new Twig_Environment(), ''));
+        $this->assertSame('', twig_random(new Twig_Environment(null, array('charset' => null)), ''));
 
         $instance = new stdClass();
         $this->assertSame($instance, twig_random(new Twig_Environment(), $instance));
-- 
1.7.2.5