// System.out.println("Codes: " + v);
while (current < (v.size() - 1)) {
it.moveToNext();
assertTrue(it.isValid());
assertTrue(it.get().hashCode() == v.get(current));
it.moveToNext();
assertTrue(it.isValid());
assertTrue(it.get().hashCode() == v.get(current + 1));
it.moveToPrevious();
assertTrue(it.isValid());
assertTrue(it.get().hashCode() == v.get(current));