def testComputeEndByteNoTotal(self):
    download = transfer.Download.FromStream(six.StringIO())
    default_chunksize = download.chunksize
    for chunksize in (100, default_chunksize):
        download.chunksize = chunksize
        for start in (0, 10):
            self.assertEqual(
                download.chunksize + start - 1,
                download._Download__ComputeEndByte(start),
                msg='Failed on start={0}, chunksize={1}'.format(
                    start, chunksize))