public function testWithData()
{
$v = new Validator(array());
$v->rule('required', 'name');
//validation failed, so must have errors
$this->assertFalse($v->validate());
$this->assertNotEmpty($v->errors());
//create copy with different data
$v2 = $v->withData(array('name' => 'Chester Tester'));
$this->assertTrue($v2->validate());
$this->assertEmpty($v2->errors());
}
