public function providerForFail()
{
return array([10, 20, true, ''], [10, 20, false, ''], [0, 1, false, 0], [0, 1, false, 1], [0, 1, false, 2], [0, 1, false, -1], [10, 20, false, 999], [10, 20, false, 20], [-10, 20, false, -11], ['a', 'j', false, 'z'], array(new DateTime('yesterday'), new DateTime('now'), false, new DateTime('tomorrow')));
}