@Test public void iteratesOverRemovedOrdinals() { BitSet previousOrdinals = bitSet(1, 2, 3, 4, 6, 7, 9, 10); BitSet currentOrdinals = bitSet(1, 3, 4, 5, 7, 8, 9); RemovedOrdinalIterator iter = new RemovedOrdinalIterator(previousOrdinals, currentOrdinals); Assert.assertEquals(2, iter.next()); Assert.assertEquals(6, iter.next()); Assert.assertEquals(10, iter.next()); Assert.assertEquals(-1, iter.next()); }