test round-tripping long (GNU) entries
TarEntry original = new TarEntry(LONG_NAME);
assertTrue("over 100 chars", LONG_NAME.length() > 100);
assertEquals("original name", LONG_NAME, original.getName());
ByteArrayOutputStream buff = new ByteArrayOutputStream();
TarOutputStream tos = new TarOutputStream(buff);
tos.setLongFileMode(TarOutputStream.LONGFILE_GNU);
tos.putNextEntry(original);
tos.closeEntry();
tos.close();
TarInputStream tis
= new TarInputStream(new ByteArrayInputStream(buff.toByteArray()));
TarEntry tripped = tis.getNextEntry();
assertEquals("round-tripped name", LONG_NAME, tripped.getName());
assertNull("no more entries", tis.getNextEntry());
tis.close();
