public function testPositiveDuration()
{
$duration = new QtiDuration('P3Y4DT6H8M');
// 2 years, 4 days, 6 hours, 8 minutes.
$this->assertEquals(3, $duration->getYears());
$this->assertEquals(4, $duration->getDays());
$this->assertEquals(6, $duration->getHours());
$this->assertEquals(8, $duration->getMinutes());
$this->assertEquals(0, $duration->getMonths());
$this->assertEquals(0, $duration->getSeconds());
}
