bandwidthThrottle\tokenBucket\storage\PDOStorageTest::providePDO PHP Метод

    public function providePDO()
    {
        $cases = [[new \PDO("sqlite::memory:")]];
        if (getenv("MYSQL_DSN")) {
            $pdo = new \PDO(getenv("MYSQL_DSN"), getenv("MYSQL_USER"));
            $pdo->setAttribute(\PDO::ATTR_AUTOCOMMIT, false);
            $cases[] = [$pdo];
        }
        if (getenv("PGSQL_DSN")) {
            $pdo = new \PDO(getenv("PGSQL_DSN"), getenv("PGSQL_USER"));
            $cases[] = [$pdo];
        }
        foreach ($cases as $case) {
            $case[0]->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
        }
        return $cases;
    }