public function validateReturnsErrorForAGivenDateOutsideUpperAndLowerBoundaries()
{
$this->validatorOptions(['earliestDate' => '2011-01-01T13:00:00Z', 'latestDate' => '2011-03-01T13:00:00Z']);
$this->assertTrue($this->validator->validate(new \DateTime('2011-04-01T13:00:00Z'))->hasErrors());
}