assertEquals(14, mmHeap.size());
    assertTrue("Heap is not intact after remove()", mmHeap.isIntact());
  }

  /** This tests a more obscure special case, but otherwise similar to above. */
  public void testInvalidatingRemove2() {
    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();
    List<Integer> values =
        Lists.newArrayList(