assertThat(map.values()).containsExactly(2, 1).inOrder();
    assertThat(map.comparator()).isNull();
  }

  public void testTreeMapNonGeneric() {
    TreeMap<LegacyComparable, Integer> map = Maps.newTreeMap();
    assertEquals(emptyMap(), map);
    map.put(new LegacyComparable("foo"), 1);
    map.put(new LegacyComparable("bar"), 2);