throws DataFormatException
{
final long now = System.currentTimeMillis();
GZipHeader origHeader = new GZipHeader();
origHeader.setTimestamp(now);
ByteBuffer buf = origHeader.store();
GZipHeader hdr = GZipHeader.load(buf);
assertNotNull(hdr);
assertNull(hdr.getFileName());
assertNull(hdr.getComment());
assertEquals((now / 1000L) * 1000L, hdr.getTimestamp());