public void testContainsEntryYes() {
    assertTrue(multimap().containsEntry(k0(), v0()));
  }

  public void testContainsEntryNo() {
    assertFalse(multimap().containsEntry(k3(), v3()));
  }

  public void testContainsEntryAgreesWithGet() {
    for (K k : sampleKeys()) {
      for (V v : sampleValues()) {
        assertEquals(multimap().get(k).contains(v), multimap().containsEntry(k, v));
      }
    }
  }

  public void testContainsEntryYes() {
    assertTrue(multimap().containsEntry(k0(), v0()));
  }

  public void testContainsEntryNo() {
    assertFalse(multimap().containsEntry(k3(), v3()));
  }

  public void testContainsEntryAgreesWithGet() {
    for (K k : sampleKeys()) {
      for (V v : sampleValues()) {
        assertEquals(multimap().get(k).contains(v), multimap().containsEntry(k, v));
      }
    }
  }

    assertFalse(multimap.containsKey("cat"));
    assertTrue(multimap.containsValue(1));
    assertFalse(multimap.containsValue(5));
    assertTrue(multimap.containsEntry("foo", 1));
    assertFalse(multimap.containsEntry("cat", 1));
    assertFalse(multimap.containsEntry("foo", 5));
    assertFalse(multimap.entries().isEmpty());
    assertEquals(3, multimap.size());
    assertFalse(multimap.isEmpty());

    assertFalse(multimap().containsEntry(k0(), v0()));
    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());
    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
    assertTrue(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));

    assertFalse(multimap().containsEntry(k0(), v0()));
    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());
    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
    assertTrue(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));

    assertFalse(multimap().containsEntry(k0(), v0()));
    assertEmpty(result);

    assertTrue(result.add(v1()));
    assertTrue(result.add(v2()));

    assertContentsAnyOrder(result, v1(), v2());
    assertContentsAnyOrder(multimap().get(k0()), v1(), v2());
    assertTrue(multimap().containsKey(k0()));
    assertFalse(multimap().containsEntry(k0(), v0()));

    unfiltered.put("badkey", 1);
    Multimap<String, Integer> filtered = filterValues(unfiltered, VALUE_PREDICATE);
    assertEquals(1, filtered.size());
    assertFalse(filtered.containsEntry("foo", 55556));
    assertTrue(filtered.containsEntry("badkey", 1));
  }

  public void testFilterFiltered() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();
    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);

    assertTrue(multimap().entries().remove(mapEntry(k0(), v0())));
    expectMissing(mapEntry(k0(), v0()));
    assertEquals(getNumElements() - 1, multimap().size());
    assertFalse(multimap().containsEntry(k0(), v0()));
  }

  @CollectionSize.Require(absent = ZERO)
  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemoveAllPropagatesToMultimap() {

    unfiltered.put("badkey", 1);
    Multimap<String, Integer> filtered = filterValues(unfiltered, VALUE_PREDICATE);
    assertEquals(1, filtered.size());
    assertFalse(filtered.containsEntry("foo", 55556));
    assertTrue(filtered.containsEntry("badkey", 1));
  }

  public void testFilterFiltered() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();
    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);

    assertTrue(multimap().containsEntry(k0(), v3()));
    assertTrue(multimap().containsEntry(k3(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutAllWithNullValue() {
    Multimap<K, V> source = getSubjectGenerator().create(mapEntry(k0(), null));
    assertTrue(multimap().putAll(source));
    assertTrue(multimap().containsEntry(k0(), null));
  }