public void testPutAll_supportedNothing() {
    getMap().putAll(emptyMap());
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testPutAll_unsupportedNothing() {
    try {
      getMap().putAll(emptyMap());
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAll_supportedNonePresent() {

  public void testPutAll_supportedNothing() {
    getMap().putAll(emptyMap());
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testPutAll_unsupportedNothing() {
    try {
      getMap().putAll(emptyMap());
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAll_supportedNonePresent() {

    } catch (NullPointerException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEY_QUERIES})
  public void testRemove_nullSupportedMissing() {
    assertNull("remove(null) should return null", getMap().remove(null));
    expectUnchanged();
  }

  @MapFeature.Require(SUPPORTS_REMOVE)
  public void testRemove_wrongType() {

    expectUnchanged();
    expectNullMissingWhenNullUnsupported("Should not contain null after unsupported add(n, null)");
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  public void testAddAtIndex_negative() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().add(-1, e3()));
    expectUnchanged();
    expectMissing(e3());
  }

    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(-1, e3()));
    expectUnchanged();
  }

  @ListFeature.Require(SUPPORTS_SET)
  public void testSet_indexTooHigh() {
    int index = getNumElements();
    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(index, e3()));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @ListFeature.Require(absent = SUPPORTS_SET)

    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testAddAll_unsupportedNothing() {
    try {
      assertFalse(
          "addAll(nothing) should return false or throw", collection.addAll(emptyCollection()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(SUPPORTS_ADD)

    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(-1, e3()));
    expectUnchanged();
  }

  @ListFeature.Require(SUPPORTS_SET)
  public void testSet_indexTooHigh() {
    int index = getNumElements();
    assertThrows(IndexOutOfBoundsException.class, () -> getList().set(index, e3()));
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @ListFeature.Require(absent = SUPPORTS_SET)

  public void testRemoveNullKeyAbsent() {
    assertFalse(multimap().remove(null, v0()));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUE_QUERIES})
  public void testRemoveNullValueAbsent() {
    assertFalse(multimap().remove(k0(), null));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)

  public void testRemoveNullKeyAbsent() {
    assertFalse(multimap().remove(null, v0()));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_VALUE_QUERIES})
  public void testRemoveNullValueAbsent() {
    assertFalse(multimap().remove(k0(), null));
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)

    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPut_unsupportedPresentDifferentValue() {
    assertThrows(UnsupportedOperationException.class, () -> getMap().put(k0(), v3()));
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})