$this->assertEqual(5,db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid',array(':fid'=>$feed->fid))->fetchField(),'Expected number of items in database.');
$this->removeFeedItems($feed);
$this->assertEqual(0,db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid',array(':fid'=>$feed->fid))->fetchField(),'Expected number of items in database.');
$this->assertEqual(5,db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid',array(':fid'=>$feed->fid))->fetchField(),'Expected number of items in database.');
$this->assertEqual(0,db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid',array(':fid'=>$feed->fid))->fetchField(),'Expected number of items in database.');
$this->assertEqual(5,db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid',array(':fid'=>$feed->fid))->fetchField(),'Expected number of items in database.');