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() {
    putAll(createDisjointCollection());
    expectAdded(e3(), e4());
  }

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

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAddAll_supportedNonePresent() {
    assertTrue(

  }

  public void testContains_wrongType() {
    try {
      assertFalse(
          "contains(wrongType) should return false or throw", collection.contains(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

  }

  public void testContains_wrongType() {
    try {
      assertFalse(
          "contains(wrongType) should return false or throw", collection.contains(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

    try {
      // noinspection SuspiciousMethodCalls
      assertFalse(
          "containsKey(wrongType) should return false or throw",
          getMap().containsKey(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

    try {
      // noinspection SuspiciousMethodCalls
      assertFalse(
          "containsValue(wrongType) should return false or throw",
          getMap().containsValue(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testClear_unsupportedByEmptyCollection() {
    try {
      collection.clear();
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  @CollectionSize.Require(SEVERAL)
  public void testClearConcurrentWithIteration() {

    try {
      // noinspection SuspiciousMethodCalls
      assertFalse(
          "containsValue(wrongType) should return false or throw",
          getMap().containsValue(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

    try {
      // noinspection SuspiciousMethodCalls
      assertFalse(
          "containsKey(wrongType) should return false or throw",
          getMap().containsKey(WrongType.VALUE));
    } catch (ClassCastException tolerated) {
    }
  }

  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testClear_unsupportedByEmptyCollection() {
    try {
      getMap().clear();
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }