public function testRuleFormatMessageOnly()
{
$rules = array('title' => 'please enter a title');
$data = array();
$expected = array('title' => array('please enter a title'));
$result = Validator::check($data, $rules);
$this->assertEqual($expected, $result);
$data = array('title' => 'new title');
$result = Validator::check($data, $rules);
$this->assertEmpty($result);
}