public void test() {
    final AtomicIntChunks ic = new AtomicIntChunks(42);
    set(0, ic);
    check(ic);

    assertFalse(ic.compareAndSet(20, 20, 40));
    assertEquals(21, ic.get(20));
    assertTrue(ic.compareAndSet(20, 21, 40));
    assertEquals(40, ic.get(20));
    assertEquals(32, ic.fieldBits());
  }
 private static void check(final AtomicIntChunks lc) {
   for (int i = 0; i < lc.length(); i++) {
     assertEquals(i + 1, lc.get(i));
   }
 }