@Override
    protected void post(final Path file, final MessageDigest digest, final StorageObject response) throws BackgroundException {
        this.verify(file, digest, Checksum.parse(response.getMd5sum()));
    }
@Test
    public void testPostChecksum() throws Exception {
        final StorageObject o = new StorageObject("f");
        o.setMd5sum("d41d8cd98f00b204e9800998ecf8427e");
        new SwiftSmallObjectUploadFeature(session, new SwiftWriteFeature(
            session, new SwiftRegionService(session))).post(
            new Path("/f", EnumSet.of(Path.Type.file)), MessageDigest.getInstance("MD5"), o
        );
    }