public function initialize()
 {
     require_once "vendor/autoload.php";
     define('YII_DEBUG', false);
     require_once "vendor/yiisoft/yii2/Yii.php";
     $application = new yii\console\Application(['id' => 'yii-benchmark', 'basePath' => __DIR__]);
     Author::$db = Book::$db = $this->db = new Connection(['dsn' => 'sqlite::memory:']);
     $this->db->open();
     Author::createTable();
     Book::createTable();
 }