Adding new test case for ModelValidator

lib/Cake/Test/Case/Model/ModelValidationTest.php

@@ -2086,5 +2086,24 @@ public function testValidateFirstAssociatedWithBeforeValidate2() {
 
 		$this->assertEquals('foo', $model->field('title', array('body' => 'a test')));
 	}
-
+
+/**
+ * Testing you can dynamically add rules to a field, added this to dispel doubts
+ * after a presentation made to show off this new feature
+ *
+ * @return void
+ **/
+	public function testDynamicValidationRuleBuilding() {
+		$model = new Article;
+		$validator = $model->validator();
+		$validator->add('body', 'isSpecial', array('rule' => 'special'));
+		$rules = $validator['body']->getRules();
+		$this->assertCount(2, $rules);
+		$this->assertEquals('special', $rules['isSpecial']->rule);
+		$validator['body']->setRule('isAwesome', array('rule' => 'awesome'));
+		$rules = $validator['body']->getRules();
+		$this->assertCount(3, $rules);
+		$this->assertEquals('awesome', $rules['isAwesome']->rule);
+	}
+
 }