function testGetDateTimeCached()
{
$tz = new \DateTimeZone('Europe/Amsterdam');
$dt = new \DateTime('1985-07-04 01:30:00', $tz);
$dt->setTimeZone($tz);
$elem = $this->vcal->createProperty('DTSTART');
$elem->setDateTime($dt);
$this->assertEquals($elem->getDateTime(), $dt);
}
function testSetParts()
{
$tz = new \DateTimeZone('Europe/Amsterdam');
$dt1 = new \DateTime('1985-07-04 01:30:00', $tz);
$dt2 = new \DateTime('1985-07-04 02:30:00', $tz);
$dt1->setTimeZone($tz);
$dt2->setTimeZone($tz);
$elem = $this->vcal->createProperty('DTSTART');
$elem->setParts([$dt1, $dt2]);
$this->assertEquals('19850704T013000,19850704T023000', (string) $elem);
$this->assertEquals('Europe/Amsterdam', (string) $elem['TZID']);
$this->assertNull($elem['VALUE']);
$this->assertTrue($elem->hasTime());
}