public function testHowToKnowIfADateIntervalIsBeforeAfterDuringOtherDateInterval()
{
$interval = new DateInterval(new Date(2013, 6, 1), new Date(2013, 6, 15));
$before = new DateInterval(new Date(2013, 5, 20), new Date(2013, 5, 30));
$after = new DateInterval(new Date(2013, 6, 16), new Date(2013, 6, 20));
$during = new DateInterval(new Date(2013, 5, 1), new Date(2013, 6, 30));
$partiallyDuring = new DateInterval(new Date(2013, 1, 1), new Date(2013, 6, 10));
$this->assertTrue($interval->isBefore($after));
$this->assertTrue($interval->isAfter($before));
$this->assertTrue($interval->isDuring($during));
$this->assertFalse($interval->isDuring($partiallyDuring));
}
