public function testSyncSupport()
{
$calendarId = $this->createTestCalendar();
// fist call without synctoken
$changes = $this->backend->getChangesForCalendar($calendarId, '', 1);
$syncToken = $changes['syncToken'];
// add a change
$event = $this->createEvent($calendarId, '20130912T130000Z', '20130912T140000Z');
// look for changes
$changes = $this->backend->getChangesForCalendar($calendarId, $syncToken, 1);
$this->assertEquals($event, $changes['added'][0]);
}