expectAdded(getNumElements() / 2, createDisjointCollection());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAllAtIndex_end() {
    assertTrue(
        "addAll(end, disjoint) should return true",
        getList().addAll(getNumElements(), createDisjointCollection()));
    expectAdded(getNumElements(), createDisjointCollection());

  public void testAddAtIndex_middle() {
    getList().add(getNumElements() / 2, e3());
    expectAdded(getNumElements() / 2, e3());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAtIndex_end() {
    getList().add(getNumElements(), e3());
    expectAdded(getNumElements(), e3());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)

  public void testAddAtIndex_middle() {
    getList().add(getNumElements() / 2, e3());
    expectAdded(getNumElements() / 2, e3());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAtIndex_end() {
    getList().add(getNumElements(), e3());
    expectAdded(getNumElements(), e3());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)

    expected.addAll(Arrays.asList(elements));
    expectContents(expected);
  }

  protected final void expectAdded(int index, E... elements) {
    expectAdded(index, Arrays.asList(elements));
  }

  protected final void expectAdded(int index, Collection<E> elements) {
    List<E> expected = Helpers.copyToList(getSampleElements());
    expected.addAll(index, elements);
    expectContents(expected);

    try {
      getMap().put(k1(), v0());
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
      // success
    }
    // verify that the bimap is unchanged
    expectAdded(e0());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(ZERO)
  public void testPutPresentKeyDifferentValue() {
    getMap().put(k0(), v0());
    getMap().put(k0(), v1());

    expectAdded(getNumElements() / 2, createDisjointCollection());
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAllAtIndex_end() {
    assertTrue(
        "addAll(end, disjoint) should return true",
        getList().addAll(getNumElements(), createDisjointCollection()));
    expectAdded(getNumElements(), createDisjointCollection());

    expectReplacement(entry(k0(), v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPut_supportedNotPresent() {
    assertNull("put(notPresent, value) should return null", put(e3()));
    expectAdded(e3());
  }

  @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_PUT})
  @CollectionSize.Require(absent = ZERO)
  public void testPutAbsentConcurrentWithEntrySetIteration() {
    try {

  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_supportedAllPresent() {
    assertTrue(
        "addAll(allPresent) should return true", getList().addAll(MinimalCollection.of(e0())));
    expectAdded(e0());
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_unsupportedAllPresent() {
    try {

    try {
      getMap().put(k1(), v0());
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
      // success
    }
    // verify that the bimap is unchanged
    expectAdded(e0());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(ZERO)
  public void testPutPresentKeyDifferentValue() {
    getMap().put(k0(), v0());
    getMap().put(k0(), v1());

    }
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAll_supportedNonePresent() {
    putAll(createDisjointCollection());
    expectAdded(e3(), e4());
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testPutAll_unsupportedNonePresent() {
    try {
      putAll(createDisjointCollection());
      fail("putAll(nonePresent) should throw");