public async Task BatchTest()
        {
            Mac           mac    = new Mac(AccessKey, SecretKey);
            BucketManager target = new BucketManager(mac);

            string s1 = target.StatOp(Bucket1, FileKey1);
            string s2 = target.ChgmOp(Bucket2, FileKey2, "MimeType");

            string[]    ops    = new string[] { s1, s2, "OP-UNDEF" };
            BatchResult result = await target.BatchAsync(ops);

            bool cond = (result.Code == (int)HttpCode.OK ||
                         result.Code == (int)HttpCode.BAD_REQUEST ||
                         result.Code == (int)HttpCode.PARTLY_OK);

            Assert.IsTrue(cond);
        }