NetServerEnumIterator iterator = new NetServerEnumIterator(parent, treeHandle, "*", 0, null);

        // Then: Remove should throw UnsupportedOperationException
        UnsupportedOperationException exception = assertThrows(UnsupportedOperationException.class, iterator::remove);
        assertEquals("remove", exception.getMessage());
    }

    @Test
    @DisplayName("Close should be idempotent")

  internal val delegate = QueueDispatcher()

  @Throws(InterruptedException::class)
  override fun dispatch(request: RecordedRequest): MockResponse = throw UnsupportedOperationException("unexpected call")

  override fun peek(): MockResponse = throw UnsupportedOperationException("unexpected call")

  fun enqueueResponse(response: MockResponse) {
    delegate.enqueue(response.wrap())
  }

  override fun shutdown() {

    assertThrows(UnsupportedOperationException.class, () -> getMap().replace(k0(), v0(), v3()));
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_unsupportedWrongValue() {
    try {
      getMap().replace(k0(), v3(), v4());
    } catch (UnsupportedOperationException tolerated) {

                    }));
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testComputeIfAbsent_unsupportedAbsent() {
    assertThrows(
        UnsupportedOperationException.class,
        () ->
            getMap()
                .computeIfAbsent(
                    k3(),
                    k -> {
                      // allowed to be called

    assertThrows(UnsupportedOperationException.class, () -> getMap().replace(k0(), v0(), v3()));
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testReplaceEntry_unsupportedWrongValue() {
    try {
      getMap().replace(k0(), v3(), v4());
    } catch (UnsupportedOperationException tolerated) {

  @SuppressWarnings("DoNotCall")
  public void testRemove() {
    Iterator<String> iterator = create();

    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertThrows(UnsupportedOperationException.class, () -> iterator.remove());
  }

  @SuppressWarnings("DoNotCall")
  public void testAdd() {
    ListIterator<String> iterator = create();

    assertTrue(iterator.hasNext());

      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(@ParametricNullness K key, Iterable<? extends V> values) {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
      throw new UnsupportedOperationException();
    }

    @Override

      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(@ParametricNullness K key, Iterable<? extends V> values) {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
      throw new UnsupportedOperationException();
    }

    @Override

    map = new MutableTypeToInstanceMap<>();
  }

  public void testPutThrows() {
    assertThrows(
        UnsupportedOperationException.class,
        () -> map.put(TypeToken.of(Integer.class), Integer.valueOf(5)));
  }

  public void testPutAllThrows() {
    assertThrows(
        UnsupportedOperationException.class,
        () -> map.putAll(ImmutableMap.of(TypeToken.of(Integer.class), Integer.valueOf(5))));
  }

    private boolean throwOnShutDown = false;

    @Override
    protected void run() {
      throw new UnsupportedOperationException("kaboom!");
    }

    @Override
    protected void shutDown() {
      shutDownCalled = true;
      if (throwOnShutDown) {
        throw new UnsupportedOperationException("double kaboom!");
      }
    }

    @Override
    protected Executor executor() {