@Override
    public Checksum compute(final InputStream in, final TransferStatus status) throws BackgroundException {
        return new Checksum(HashAlgorithm.sha512, this.digest("SHA-512",
                this.normalize(in, status), status));
    }
@Test
    public void testCompute() throws Exception {
        assertEquals("cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e",
            new SHA512ChecksumCompute().compute(new NullInputStream(0), new TransferStatus()).hash);
    }