@Override
    public Checksum compute(final InputStream in, final TransferStatus status) throws BackgroundException {
        IOUtils.closeQuietly(in);
        return Checksum.NONE;
    }
@Test
    public void compute() throws Exception {
        final NullInputStream in = new NullInputStream(0L);
        new DisabledChecksumCompute().compute(in, new TransferStatus());
        assertEquals(-1, in.read());
        assertEquals(-1, in.read());
    }