assertEquals(i, vs.length - 1);
assertTrue(Arrays.equals(r, new Integer[] {1, 2, 3, 4, 5, 6, 7, null}));
it = ia.pointerIterator();
assertTrue(it.isValid());
it.dec();
assertFalse(it.isValid());
it.inc();
assertFalse(it.isValid());
it.moveToLast();
assertTrue(it.isValid());