public async Task AppendTest()
{
client = new WebHdfsClient(DataTestUtility.HdfsConnStr);
var dirPath = $"{DataTestUtility.HdfsRootDir}/{nameof(AppendTest)}";
await client.Delete(dirPath, Recursive : true);
await client.UploadFile($"{dirPath}/sample", File.OpenRead("Samples/SampleTextFile.txt"), Overwrite : true);
await client.Append($"{dirPath}/sample", File.OpenRead("Samples/SampleTextFile2.txt"));
var fileStat = await client.GetFileStatus($"{dirPath}/sample");
Assert.True(fileStat.Length == 12);
}