public void TestOneOffEncoding(bool pad) { var input = GetData(); long length = 0; var leftover = 0; var encoder = new Base64Encoder { Pad = pad }; var output = new byte[encoder.RequiredBufferSize(input.Length)]; encoder.ProcessBlock(input, output, ref length, ref leftover); length = (int)encoder.Finalize(output, length, leftover); output = output[..(int)length];