public function testValidatorShouldPassWithOnlyKeyValidation()
{
$v = new Each(null, $this->getRuleMock(true));
$result = $v->check(['a', 'b', 'c', 'd', 'e']);
$this->assertTrue($result);
$result = $v->assert(['a', 'b', 'c', 'd', 'e']);
$this->assertTrue($result);
}