public function testBeforeAndAfter()
 {
     $gateway = $this->getTableGateway();
     $handler = new QueueSubscriber($gateway);
     $before = new DateTime('2013-11-01 01:35:00');
     $after = new DateTime('2013-11-01 01:00:00');
     $event = new QueueListEvent(0, 10, null, null, $before, $after);
     $handler->onList($event);
     $results = $event->getResult();
     $this->assertEquals(7, count($results));
 }