@Test
public void natural_order_long_value() {

  ExprValueOrdering ordering = ExprValueOrdering.natural();
  assertEquals(1, ordering.compare(longValue(5L), longValue(4L)));
  assertEquals(0, ordering.compare(longValue(5L), longValue(5L)));
  assertEquals(-1, ordering.compare(longValue(4L), longValue(5L)));
}