@Test(expected = NoSuchElementException.class)
public void testGetItems() throws Exception {

  LongPrimitiveIterator it = model.getItemIDs();
  assertNotNull(it);
  assertTrue(it.hasNext());
  assertEquals(123, it.nextLong());
  assertTrue(it.hasNext());
  assertEquals(234, it.nextLong());
  assertTrue(it.hasNext());
  assertEquals(456, it.nextLong());
  assertTrue(it.hasNext());
  assertEquals(654, it.nextLong());
  assertTrue(it.hasNext());
  assertEquals(789, it.nextLong());
  assertTrue(it.hasNext());
  assertEquals(999, it.nextLong());
  assertFalse(it.hasNext());
  it.next();
}