diff -r 6d109e3804ac -r 9a001a04b634 Twig-1.3.0/lib/Twig/Node/Expression/Test.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Twig-1.3.0/lib/Twig/Node/Expression/Test.php	Tue Oct 25 23:56:28 2011 +0200
@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Node_Expression_Test extends Twig_Node_Expression
+{
+    public function __construct(Twig_NodeInterface $node, $name, Twig_NodeInterface $arguments = null, $lineno)
+    {
+        parent::__construct(array('node' => $node, 'arguments' => $arguments), array('name' => $name), $lineno);
+    }
+
+    public function compile(Twig_Compiler $compiler)
+    {
+        $testMap = $compiler->getEnvironment()->getTests();
+        if (!isset($testMap[$this->getAttribute('name')])) {
+            throw new Twig_Error_Syntax(sprintf('The test "%s" does not exist', $this->getAttribute('name')), $this->getLine());
+        }
+
+        $name = $this->getAttribute('name');
+        $node = $this->getNode('node');
+
+        // defined is a special case
+        if ('defined' === $name) {
+            if ($node instanceof Twig_Node_Expression_Name || $node instanceof Twig_Node_Expression_GetAttr) {
+                $node->setAttribute('is_defined_test', true);
+                $compiler->subcompile($node);
+                $node->removeAttribute('is_defined_test');
+            } else {
+                throw new Twig_Error_Syntax('The "defined" test only works with simple variables', $this->getLine());
+            }
+            return;
+        }
+
+        $compiler
+            ->raw($testMap[$name]->compile().'(')
+            ->subcompile($node)
+        ;
+
+        if (null !== $this->getNode('arguments')) {
+            $compiler->raw(', ');
+
+            $max = count($this->getNode('arguments')) - 1;
+            foreach ($this->getNode('arguments') as $i => $arg) {
+                $compiler->subcompile($arg);
+
+                if ($i != $max) {
+                    $compiler->raw(', ');
+                }
+            }
+        }
+
+        $compiler->raw(')');
+    }
+}