[HttpFoundation] SPL on ParameterBag

Added some SPL interface goodness to the ParameterBag class

src/Symfony/Component/HttpFoundation/ParameterBag.php

@@ -18,7 +18,7 @@ namespace Symfony\Component\HttpFoundation;
  *
  * @api
  */
-class ParameterBag
+class ParameterBag implements \IteratorAggregate, \Countable
 {
     /**
      * Parameter storage.
@@ -278,4 +278,24 @@ class ParameterBag
 
         return filter_var($value, $filter, $options);
     }
+
+    /**
+     * IteratorAggregate method for looping the instance
+     *
+     * @return array An array of parameters
+     */
+    public function getIterator()
+    {
+        return new \ArrayIterator($this->parameters);
+    }
+
+    /**
+     * Countable method returning the number of key/val pairings
+     *
+     * @return int Number of parameters held in the bag
+     */
+    public function count()
+    {
+        return count($this->parameters);
+    }
 }

tests/Symfony/Tests/Component/HttpFoundation/ParameterBagTest.php

@@ -202,4 +202,32 @@ class ParameterBagTest extends \PHPUnit_Framework_TestCase
 
 
     }
+
+    /**
+     * @covers Symfony\Component\HttpFoundation\ParameterBag::getIterator
+     */
+    public function testGetIterator()
+    {
+        $parameters = array('foo' => 'bar', 'hello' => 'world');
+        $bag = new ParameterBag($parameters);
+
+        $i = 0;
+        foreach ($bag as $key => $val) {
+            $i++;
+            $this->assertEquals($parameters[$key], $val);
+        }
+
+        $this->assertEquals(count($parameters), $i);
+    }
+
+    /**
+     * @covers Symfony\Component\HttpFoundation\ParameterBag::count
+     */
+    public function testCount()
+    {
+        $parameters = array('foo' => 'bar', 'hello' => 'world');
+        $bag = new ParameterBag($parameters);
+
+        $this->assertEquals(count($parameters), count($bag));
+    }
 }