protected Collection<Entry<K, V>> actualContents() {
    return getMap().entrySet();
  }

  /**
   * @see AbstractContainerTester#resetContainer()
   */
  protected final void resetMap() {
    resetContainer();
  }

  protected void resetMap(Entry<K, V>[] entries) {
    resetContainer(getSubjectGenerator().create((Object[]) entries));
  }

  protected void expectMissingKeys(K... elements) {
    for (K element : elements) {

    for (K key : sampleKeys()) {
      resetContainer();
      Collection<V> collection = multimap().get(key);
      multimap().clear();
      assertEmpty(collection);
    }
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testClearPropagatesToAsMapGet() {
    for (K key : sampleKeys()) {
      resetContainer();

  public void testGetMultiple() {
    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v2()));
    assertGet(k0(), v0(), v1(), v2());
  }

  public void testGetAbsentKey() {
    assertGet(k4());
  }

  @CollectionSize.Require(SEVERAL)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testPropagatesRemoveToMultimap() {

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  public void testEquals_containingNullKey() {
    Collection<Entry<K, V>> entries = getSampleEntries(getNumEntries() - 1);
    entries.add(entry(null, v3()));

    resetContainer(getSubjectGenerator().create(entries.toArray()));
    assertTrue(
        "A Map should equal any other Map containing the same entries,"
            + " even if some keys are null.",

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutPresentKeyPropagatesToGet() {
    List<K> keys = copyToList(multimap().keySet());
    for (K key : keys) {
      resetContainer();

      int size = getNumElements();

      Collection<V> collection = multimap().get(key);
      Collection<V> expectedCollection = copyToList(collection);

      multimap().put(key, v3());

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutPresentKeyPropagatesToGet() {
    List<K> keys = copyToList(multimap().keySet());
    for (K key : keys) {
      resetContainer();

      int size = getNumElements();

      Collection<V> collection = multimap().get(key);
      Collection<V> expectedCollection = copyToList(collection);

      multimap().put(key, v3());

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testReplaceValuesPreservesOrder() {
    List<V> values = asList(v3(), v1(), v4());

    for (K k : sampleKeys()) {
      resetContainer();
      multimap().replaceValues(k, values);
      assertGet(k, values);
    }
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testReplaceValuesHandlesDuplicates() {
    List<V> values = asList(v0(), v1(), v0());

    for (K k : sampleKeys()) {
      resetContainer();
      multimap().replaceValues(k, values);
      assertGet(k, v0(), v1());
    }
  }

  public void testGetMultiple() {
    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v1()), mapEntry(k0(), v2()));
    assertGet(k0(), v0(), v1(), v2());
  }

  public void testGetAbsentKey() {
    assertGet(k4());
  }

  @CollectionSize.Require(SEVERAL)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testPropagatesRemoveToMultimap() {

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testReplaceValuesHandlesDuplicates() {
    List<V> values = asList(v0(), v1(), v0());

    for (K k : sampleKeys()) {
      resetContainer();
      multimap().replaceValues(k, values);
      assertGet(k, v0(), v1());
    }
  }