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

  public void testTreeMapWithComparator() {
    TreeMap<Integer, Integer> map = Maps.newTreeMap(SOME_COMPARATOR);
    assertEquals(emptyMap(), map);
    assertThat(map.comparator()).isEqualTo(SOME_COMPARATOR);
  }