@CollectionFeature.Require(SUPPORTS_ADD)
  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedPresent() {
    assertFalse("add(present) should return false", getSet().add(e0()));
    expectUnchanged();
  }

  @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testAdd_supportedNullPresent() {
    E[] array = createArrayWithNullElement();

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testRemove_empty() {
    assertThrows(NoSuchElementException.class, () -> getQueue().remove());
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ONE)
  public void testRemove_size1() {
    assertEquals("size1Queue.remove() should return first element", e0(), getQueue().remove());

                      assertEquals(v0(), oldV);
                      assertEquals(v3(), newV);
                      throw new SomeUncheckedException();
                    }));
    expectUnchanged();
  }

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

  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_supportedAllPresent() {
    assertFalse("add(allPresent) should return false", getSet().addAll(MinimalCollection.of(e0())));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  public void testAddAll_unsupportedAllPresent() {
    assertThrows(
        UnsupportedOperationException.class, () -> getList().addAll(MinimalCollection.of(e0())));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAddAll_withDuplicates() {
    MinimalCollection<E> elementsToAdd = MinimalCollection.of(e0(), e1(), e0(), e1());

  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetRemoveAbsent() {
    Set<E> elementSet = getMultiset().elementSet();
    assertFalse(elementSet.remove(e3()));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetClear() {
    getMultiset().elementSet().clear();
    assertEmpty(getMultiset());
  }

  /**

  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetRemoveAbsent() {
    Set<E> elementSet = getMultiset().elementSet();
    assertFalse(elementSet.remove(e3()));
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetClear() {
    getMultiset().elementSet().clear();
    assertEmpty(getMultiset());
  }

  /**

                      assertEquals(v0(), oldV);
                      assertEquals(v3(), newV);
                      throw new SomeUncheckedException();
                    }));
    expectUnchanged();
  }

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

  public void testSetValueWithNullValuesAbsent() {
    for (Entry<K, V> entry : getMap().entrySet()) {
      assertThrows(NullPointerException.class, () -> entry.setValue(null));
      break;
    }
    expectUnchanged();
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableKeyMethod() {

  public void testSetValueWithNullValuesAbsent() {
    for (Entry<K, V> entry : getMap().entrySet()) {
      assertThrows(NullPointerException.class, () -> entry.setValue(null));
      break;
    }
    expectUnchanged();
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableKeyMethod() {