public void testSimple() { LongList[] lists = {LongList.EMPTY, new LongList.Single(10), LongArray.create(0, 1, 2), LongProgression.Arithmetic.range(3), null}; for (LongList list : lists) { assertEquals(0, comparator.compare(list, list)); } assertEquals(-1, comparator.compare(null, LongArray.create(0, 1, 2))); assertEquals(0, comparator.compare(lists[2], lists[3])); assertEquals(0, comparator.compare(lists[2], lists[2].iterator())); } }