@Override
  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) {

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

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

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

    for (K k : sampleKeys()) {
      resetContainer();

      List<V> expectedValues = copyToList(multimap().get(k));

      assertTrue(multimap().putAll(k, values));
      expectedValues.addAll(values);

      assertGet(k, expectedValues);
    }
  }

    assertEquals(getNumElements() - 1, multimap().size());
  }

  @CollectionSize.Require(SEVERAL)
  @MapFeature.Require(SUPPORTS_PUT)
  public void testAsMapEntrySetReflectsPutSameKey() {
    resetContainer(Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v3()));

    Set<Entry<K, Collection<V>>> asMapEntrySet = multimap().asMap().entrySet();

    for (K key : keys) {
      resetCollection();
      assertTrue(multimap().asMap().remove(key) instanceof List);
    }
  }

  @CollectionSize.Require(SEVERAL)
  public void testEquals() {
    resetContainer(
        Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k1(), v0()), Helpers.mapEntry(k0(), v3()));
    Map<K, Collection<V>> expected = Maps.newHashMap();
    expected.put(k0(), Lists.newArrayList(v0(), v3()));

public class MultimapKeysTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  @CollectionSize.Require(SEVERAL)
  public void testKeys() {
    resetContainer(
        Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v1()), Helpers.mapEntry(k1(), v0()));
    Multiset<K> keys = multimap().keys();
    assertEquals(2, keys.count(k0()));
    assertEquals(1, keys.count(k1()));

public class MultimapKeysTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  @CollectionSize.Require(SEVERAL)
  public void testKeys() {
    resetContainer(
        Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v1()), Helpers.mapEntry(k1(), v0()));
    Multiset<K> keys = multimap().keys();
    assertEquals(2, keys.count(k0()));
    assertEquals(1, keys.count(k1()));

  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

    for (Entry<K, V> entry : entries) {
      resetContainer();
      K k = entry.getKey();
      V v = entry.getValue();

      Set<V> values = multimap().get(k);
      Set<V> expectedValues = copyToSet(values);

      assertFalse(multimap().put(k, v));

  /**
   * Replaces the existing container under test with a new container created by the subject
   * generator.
   *
   * @see #resetContainer(Object) resetContainer(C)
   * @return the new container instance.
   */
  @CanIgnoreReturnValue
  protected C resetContainer() {
    return resetContainer(getSubjectGenerator().createTestSubject());
  }

  /**

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAddsValueAtEnd() {
    for (K key : sampleKeys()) {
      for (V value : sampleValues()) {
        resetContainer();

        List<V> values = multimap().get(key);
        List<V> expectedValues = Helpers.copyToList(values);

        assertTrue(multimap().put(key, value));
        expectedValues.add(value);