public void testShouldInvert() throws Exception {
   InvertibleComparator<Integer> invertibleComparator =
       new InvertibleComparator<Integer>(comparator);
   assertThat(invertibleComparator.isAscending(), is(true));
   assertThat(invertibleComparator.compare(1, 2), is(-1));
   invertibleComparator.invertOrder();
   assertThat(invertibleComparator.isAscending(), is(false));
   assertThat(invertibleComparator.compare(1, 2), is(1));
 }
 public void testShouldDefaultToAscending() throws Exception {
   InvertibleComparator<Integer> invertibleComparator =
       new InvertibleComparator<Integer>(comparator);
   assertThat(invertibleComparator.isAscending(), is(true));
   assertThat(invertibleComparator.compare(1, 2), is(-1));
 }