public void testIterator() {
    List<E> iteratorElements = new ArrayList<>();
    for (E element : collection) { // uses iterator()
      iteratorElements.add(element);
    }
    Helpers.assertEqualIgnoringOrder(Arrays.asList(createSamplesArray()), iteratorElements);
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testIterationOrdering() {
    List<E> iteratorElements = new ArrayList<>();

    List<Entry<E>> actual = new ArrayList<>();
    getMultiset()
        .forEachEntry((element, count) -> actual.add(Multisets.immutableEntry(element, count)));
    Helpers.assertEqualIgnoringOrder(expected, actual);
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testForEachEntryOrdered() {
    List<Entry<E>> expected = new ArrayList<>(getMultiset().entrySet());

    super.expectContents(expected);
    List<Entry<V, K>> reversedEntries = new ArrayList<>();
    for (Entry<K, V> entry : expected) {
      reversedEntries.add(reverseEntry(entry));
    }
    Helpers.assertEqualIgnoringOrder(getMap().inverse().entrySet(), reversedEntries);

    for (Entry<K, V> entry : expected) {
      assertEquals(
          "Wrong key for value " + entry.getValue(),
          entry.getKey(),

    super.expectContents(expected);
    List<Entry<V, K>> reversedEntries = new ArrayList<>();
    for (Entry<K, V> entry : expected) {
      reversedEntries.add(reverseEntry(entry));
    }
    Helpers.assertEqualIgnoringOrder(getMap().inverse().entrySet(), reversedEntries);

    for (Entry<K, V> entry : expected) {
      assertEquals(
          "Wrong key for value " + entry.getValue(),
          entry.getKey(),

    }
  }

  public static void assertContentsInOrder(Iterable<?> actual, Object... expected) {
    assertEqualInOrder(Arrays.asList(expected), actual);
  }

  public static void assertEqualIgnoringOrder(Iterable<?> expected, Iterable<?> actual) {
    List<?> exp = copyToList(expected);
    List<?> act = copyToList(actual);
    String actString = act.toString();

        array,
        collection.toArray(array));
  }

  private void expectArrayContentsAnyOrder(Object[] expected, Object[] actual) {
    Helpers.assertEqualIgnoringOrder(Arrays.asList(expected), Arrays.asList(actual));
  }

  private void expectArrayContentsInOrder(List<E> expected, Object[] actual) {
    assertEquals("toArray() ordered contents: ", expected, Arrays.asList(actual));

        array,
        collection.toArray(array));
  }

  private void expectArrayContentsAnyOrder(Object[] expected, Object[] actual) {
    Helpers.assertEqualIgnoringOrder(Arrays.asList(expected), Arrays.asList(actual));
  }

  private void expectArrayContentsInOrder(List<E> expected, Object[] actual) {
    assertEquals("toArray() ordered contents: ", expected, Arrays.asList(actual));