Implemented countable interface for CakeValidationSet

lib/Cake/Model/ModelValidator.php

@@ -482,7 +482,7 @@ class ModelValidator implements ArrayAccess, IteratorAggregate, Countable {
 	}
 
 /**
- * Returns the numbers of fields having validation rules
+ * Returns the number of fields having validation rules
  *
  * @return int
  **/

lib/Cake/Model/Validator/CakeValidationSet.php

@@ -27,7 +27,7 @@ App::uses('CakeRule', 'Model/Validator');
  * @package       Cake.Model.Validator
  * @link          http://book.cakephp.org/2.0/en/data-validation.html
  */
-class CakeValidationSet implements ArrayAccess, IteratorAggregate {
+class CakeValidationSet implements ArrayAccess, IteratorAggregate, Countable {
 
 /**
  * Holds the ValidationRule objects
@@ -293,4 +293,13 @@ class CakeValidationSet implements ArrayAccess, IteratorAggregate {
 		return new ArrayIterator($this->_rules);
 	}
 
+/**
+ * Returns the number of rules in this set
+ *
+ * @return int
+ **/
+	public function count() {
+		return count($this->_rules);
+	}
+
 }

lib/Cake/Test/Case/Model/Validator/CakeValidationSetTest.php

@@ -274,4 +274,21 @@ class CakeValidationSetTest  extends CakeTestCase {
 		$this->assertEquals(3, $i);
 	}
 
+/**
+ * Tests countable interface
+ *
+ * @return void
+ */
+	public function testCount() {
+		$Set = new CakeValidationSet('title', array(
+			'notEmpty' => array('rule' => 'notEmpty', 'required' => true),
+			'numeric' => array('rule' => 'numeric'),
+			'other' => array('rule' => array('other', 1)),
+		));
+		$this->assertCount(3, $Set);
+
+		unset($Set['other']);
+		$this->assertCount(2, $Set);
+	}
+
 }