assertEquals("a", elementSet.first());
    assertEquals("foo", elementSet.last());
    assertEquals(DEGENERATE_COMPARATOR, elementSet.comparator());
  }

  public void testSubMultisetSize() {
    TreeMultiset<String> ms = TreeMultiset.create();
    ms.add("a", Integer.MAX_VALUE);
    ms.add("b", Integer.MAX_VALUE);
    ms.add("c", 3);

    assertEquals(Integer.MAX_VALUE, ms.count("a"));