function testCalendars()
{
$expected = strtotime('2010/01/13');
$date = new IntlDatetime('2010/01/13', null, 'gregorian');
$result = $date->getTimestamp();
$this->assertEquals($result, $expected);
$date = new IntlDatetime('1431/01/27', null, 'islamic-civil');
$result = $date->getTimestamp();
$this->assertEquals($result, $expected);
$date = new IntlDatetime('1388/10/23', null, 'persian');
$result = $date->getTimestamp();
$this->assertEquals($result, $expected);
$result = $date->getCalendar();
$this->assertEquals($result, 'persian');
$date->setCalendar('gregorian');
$result = $date->getCalendar();
$this->assertEquals($result, 'gregorian');
$result = $date->format('yyyy/MM/dd');
$this->assertEquals($result, '2010/01/13');
}
