public void GetFolderListTest()
        {
            var rootFolders = OneDriveUtility.GetFolders(connection, null);

            Assert.IsTrue(rootFolders.IsSucceed);

            foreach (OneDriveFolder dir in rootFolders.Data)
            {
                var cntFile = OneDriveUtility.GetFiles(connection, dir.Id);
                Assert.IsTrue(cntFile.IsSucceed);

                var cntFolder = OneDriveUtility.GetFolders(connection, dir.Id);
                Assert.IsTrue(cntFolder.IsSucceed);
            }
        }