public static function setUpBeforeClass()
 {
     $fdsConfig = new FDSClientConfiguration();
     $fdsConfig->setEnableMd5Calculate(true);
     $fdsConfig->enableUnitTestMode(true);
     $fdsConfig->setBaseUriforunittest("http://files.fds.api.xiaomi.com/");
     self::$credential = new BasicFDSCredential("access_key", "access_secret");
     self::$fds_client = new GalaxyFDSClient(self::$credential, $fdsConfig);
     self::$bucket_name = "test-php-sdk-bucket-name";
 }