public static function setUpBeforeClass()
 {
     $class = new \ReflectionClass(get_called_class());
     $doc = $class->getDocComment();
     if (preg_match(self::DB_ISOLATION, $doc, $matches) > 0) {
         self::$db_isolation = true;
     } else {
         self::$db_isolation = false;
     }
     if (preg_match(self::DB_REINDEX, $doc, $matches) > 0) {
         self::$db_reindex = true;
     } else {
         self::$db_reindex = false;
     }
 }