}
  }

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCount_zeroToThree_supported() {
    assertSetCount(e3(), 3);
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCount_oneToThree_supported() {
    assertSetCount(e0(), 3);
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCount_zeroToOne_unsupported() {

    }
  }

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCount_zeroToThree_supported() {
    assertSetCount(e3(), 3);
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCount_oneToThree_supported() {
    assertSetCount(e0(), 3);
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCount_zeroToOne_unsupported() {

  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAllNonEmptyCollectionOnAbsentKey() {
    assertTrue(multimap().putAll(k3(), Lists.newArrayList(v3(), v4())));
    assertGet(k3(), v3(), v4());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutAllNullValueOnPresentKey_supported() {

  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutNullValue_supported() {
    int size = getNumElements();

    multimap().put(k3(), null);

    assertGet(k3(), Lists.newArrayList((V) null)); // ImmutableList.of can't take null.
    assertEquals(size + 1, multimap().size());
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)

  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAllNonEmptyCollectionOnAbsentKey() {
    assertTrue(multimap().putAll(k3(), Lists.newArrayList(v3(), v4())));
    assertGet(k3(), v3(), v4());
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutAllNullValueOnPresentKey_supported() {

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testRemoveNegative() {
    try {
      getMultiset().remove(e0(), -1);
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemoveUnsupported() {
    try {

    extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAddAll_supportedNothing() {
    assertFalse("addAll(nothing) should return false", collection.addAll(emptyCollection()));
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testAddAll_unsupportedNothing() {
    try {
      assertFalse(

    extends AbstractMultimapTester<K, V, Multimap<K, V>> {

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_VALUES})
  public void testReplaceValuesWithNullValue() {
    List<V> values = Arrays.asList(v0(), null, v3());
    multimap().replaceValues(k0(), values);
    assertGet(k0(), values);
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})
  public void testReplaceValuesWithNullKey() {

public class CollectionAddTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAdd_supportedNotPresent() {
    assertTrue("add(notPresent) should return true", collection.add(e3()));
    expectAdded(e3());
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testAdd_unsupportedNotPresent() {
    try {
      collection.add(e3());

public class MultisetAddTester<E> extends AbstractMultisetTester<E> {
  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testAddUnsupported() {
    try {
      getMultiset().add(e0());
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }
  }

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAddMeansAddOne() {
    int originalCount = getMultiset().count(e0());