chunk1 = getNextChunk(byteString, 0, 10);
chunk2 = getNextChunk(byteString, 10, 10);
chunk3 = getNextChunk(byteString, 20, byteString.size());
fbos = spy(new FileBackedOutputStream(100000000, "target"));
chunk1 = getNextChunk(byteString, 0, 10);
chunk2 = getNextChunk(byteString, 10, 10);
chunk3 = getNextChunk(byteString, 20, byteString.size());
fbos = spy(new FileBackedOutputStream(100000000, "target"));