public function setUp()
 {
     parent::setup();
     $settings = new Settings();
     $settings->server = 'mongodb://localhost:27017';
     $settings->database = 'ObjectPersistenceTest';
     $settings->collection = 'Storage';
     self::$objectPersistence->setBackend(new MongoDB($settings));
 }
 public function setUp()
 {
     parent::setup();
     self::$objectPersistence->setBackend(new Memory());
 }
 public function setUp()
 {
     self::$objectPersistence = new ObjectPersistence();
 }