final StringBuilder sb = new StringBuilder();
            if (StringUtil.isBlank(cause.getMessage())) {
                sb.append(cause.getClass().getName());
            } else {
                sb.append(cause.getMessage());
            }
            try (final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw)) {
                cause.printStackTrace(pw);

    ListenableFuture<String> f =
        new SimpleForwardingListenableFuture<String>(immediateFuture("a")) {};
    verify(!(f instanceof FluentFuture));
    assertThat(FluentFuture.from(f).get()).isEqualTo("a");
    // TODO(cpovirk): Test forwarding more extensively.
  }

  public void testAddCallback() {
    FluentFuture<String> f = FluentFuture.from(immediateFuture("a"));
    boolean[] called = new boolean[1];
    f.addCallback(

        }

        @Test
        @DisplayName("Null tree handle triggers NullPointerException")
        void ctor_nullTree_throwsNPE() {
            // Arrange
            when(handle.getPipe()).thenReturn(pipe);

            // Act + Assert
            assertThrows(NullPointerException.class, () -> new SmbPipeOutputStream(handle, null));
        }

    private DuplicateMerger merger = new DuplicateMerger();

    @Override
    public void mergeDuplicates(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        Build build = model.getBuild();
        if (build != null) {
            List<Plugin> plugins = build.getPlugins();
            Map<Object, Plugin> normalized = new LinkedHashMap<>(plugins.size() * 2);

	if !a.Enable {
		return nil
	}
	if a.URL.IsEmpty() {
		return errors.New("empty URL")
	}
	if a.Format != "" {
		f := strings.ToLower(a.Format)
		if f != event.NamespaceFormat && f != event.AccessFormat {
			return errors.New("format value unrecognized")
		}
	}
	if a.Index == "" {
		return errors.New("empty index value")
	}

  static <V extends @Nullable Object> TrustedListenableFutureTask<V> create(
      AsyncCallable<V> callable) {
    return new TrustedListenableFutureTask<>(callable);
  }

  static <V extends @Nullable Object> TrustedListenableFutureTask<V> create(Callable<V> callable) {
    return new TrustedListenableFutureTask<>(callable);
  }

  /**

    Set<Feature<?>> features = computeMultimapAsMapGetFeatures(parentBuilder.getFeatures());
    if (Collections.disjoint(features, EnumSet.allOf(CollectionSize.class))) {
      return new TestSuite();
    } else {
      return SetTestSuiteBuilder.using(
              new MultimapAsMapGetGenerator<K, V>(parentBuilder.getSubjectGenerator()))
          .withFeatures(features)
          .named(parentBuilder.getName() + ".asMap[].get[key]")

 */
@NullUnmarked
public class FunnelsTest extends TestCase {
  public void testForBytes() {
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    byteArrayFunnel().funnel(new byte[] {4, 3, 2, 1}, primitiveSink);
    verify(primitiveSink).putBytes(new byte[] {4, 3, 2, 1});
  }

  public void testForBytes_null() {
    assertNullsThrowException(byteArrayFunnel());
  }

  public void testForStrings() {

      enumConstantCache = new WeakHashMap<>();

  private static <T extends Enum<T>> Map<String, WeakReference<? extends Enum<?>>> populateCache(
      Class<T> enumClass) {
    Map<String, WeakReference<? extends Enum<?>>> result = new HashMap<>();
    for (T enumInstance : EnumSet.allOf(enumClass)) {
      result.put(enumInstance.name(), new WeakReference<Enum<?>>(enumInstance));
    }

        // Test that DcerpcException can be created and implements DcerpcError
        DcerpcException ex1 = new DcerpcException("Test error", null);
        assertTrue(ex1 instanceof DcerpcError, "DcerpcException should implement DcerpcError");

        // Test that DcerpcException can be created with string messages
        DcerpcException ex2 = new DcerpcException("Access denied error");