public function testEvents()
{
$obj = new SystemCalendar();
$event = new CalendarEvent();
$obj->addEvent($event);
$this->assertCount(1, $obj->getEvents());
$events = $obj->getEvents();
$this->assertSame($event, $events[0]);
$this->assertSame($obj, $events[0]->getSystemCalendar());
}
