public function itPurgeSystemEventsDataOlderThanOneYear()
 {
     $this->purgeTable();
     $this->insertHugeData();
     $this->assertEqual($this->getNumberOfEvents(), 6);
     $this->system_event_purger->purgeSystemEventsDataOlderThanOneYear();
     $this->assertEqual($this->getNumberOfEvents(), 3);
     $this->purgeTable();
 }
 private function purgeSystemEventsDataOlderThanOneYear()
 {
     $dao = new SystemEventDao();
     $system_event_purger = new SystemEventPurger($dao);
     return $system_event_purger->purgeSystemEventsDataOlderThanOneYear();
 }