public function testNoExceptionWhenEmptyQuery()
 {
     $dbC = new DatabaseTestingConnector();
     $databaseIO = new Database_IO($dbC->getConfig());
     $dbC->dropAllTables();
     $flag = false;
     try {
         $databaseIO->query('', MULTI_QUERY);
         $databaseIO->query('', RETURN_VALUE);
         $databaseIO->query('', RETURN_OBJECT);
     } catch (Exception $e) {
         $flag = true;
     }
     $this->assertEqual($flag, false);
 }