assertEquals(new HashSet<>(elements), newHashSet(mmHeap.iterator()));
            assertIntact(mmHeap);
          }
        };
    tester.test();
  }

  public void testIteratorTester() throws Exception {
    Random random = new Random(0);
    List<Integer> list = new ArrayList<>();
    for (int i = 0; i < 3; i++) {
      list.add(random.nextInt());
    }
    runIterator(list, 6);
  }