import org.jspecify.annotations.Nullable;

/**
 * Hidden superclass of {@link FluentFuture} that provides us a place to declare special GWT
 * versions of the {@link FluentFuture#catching(Class, com.google.common.base.Function)
 * FluentFuture.catching} family of methods. Those versions have slightly different signatures.
 */
@GwtCompatible
@J2ktIncompatible // Super-sourced

import org.jspecify.annotations.Nullable;

/**
 * Hidden superclass of {@link FluentFuture} that provides us a place to declare special GWT
 * versions of the {@link FluentFuture#catching(Class, com.google.common.base.Function)
 * FluentFuture.catching} family of methods. Those versions have slightly different signatures.
 */
abstract class GwtFluentFutureCatchingSpecialization<V extends @Nullable Object>
    extends AbstractFuture<V> {
  /*

import org.jspecify.annotations.Nullable;

/**
 * Hidden superclass of {@link Futures} that provides us a place to declare special GWT versions of
 * the {@link Futures#catching(ListenableFuture, Class, com.google.common.base.Function)
 * Futures.catching} family of methods. Those versions have slightly different signatures.
 */
abstract class GwtFuturesCatchingSpecialization {
  /*

app = FastAPI()


@app.get("/catching")
def catching(d: Annotated[str, Depends(catching_dep)]) -> Any:
    raise CustomError("Simulated error during streaming")


@app.get("/broken")
def broken(d: Annotated[str, Depends(broken_dep)]) -> Any:
    return {"message": "all good?"}


client = TestClient(app)


def test_catching():
    response = client.get("/catching")
    assert response.status_code == 418

        assertTrue(exception instanceof Exception);
        assertTrue(exception instanceof Throwable);
    }

    @Test
    public void test_throwAndCatch() {
        // Test throwing and catching the exception
        final String errorMessage = "Data store operation failed";

        try {
            throw new DataStoreException(errorMessage);
        } catch (DataStoreException e) {

        assertEquals(middleCause, exception.getCause());
        assertEquals(innerCause, exception.getCause().getCause());
    }

    @Test
    public void test_throwAndCatch() {
        // Test throwing and catching the exception
        int expectedStatusCode = 403;
        String expectedMessage = "Access denied";

        try {
            throw new WebApiException(expectedStatusCode, expectedMessage);

                break;
            }
        }
        assertTrue(foundTestMethod);
    }

    @Test
    public void test_throwAndCatch() {
        // Test throwing and catching the exception
        String expectedMessage = "Offset limit exceeded: 10000";

        try {
            throw new ResultOffsetExceededException(expectedMessage);
        } catch (ResultOffsetExceededException e) {

        UserRoleLoginException exception = new UserRoleLoginException(RootAction.class);
        assertNull(exception.getCause());
    }

    @Test
    public void test_throwAndCatch() {
        // Test throwing and catching the exception
        try {
            throw new UserRoleLoginException(RootAction.class);
        } catch (UserRoleLoginException e) {
            assertEquals(RootAction.class, e.getActionClass());

    public void testThrowAndCatch() {
        // Test throwing and catching with message
        String expectedMessage = "Transport failed";
        assertThrows(TransportException.class, () -> {
            throw new TransportException(expectedMessage);
        });

        // Test throwing and catching with cause
        RuntimeException cause = new RuntimeException("Cause");

  @Partially.GwtIncompatible("AVAILABLE but requires exceptionType to be Throwable.class")
  public final <X extends Throwable> FluentFuture<V> catching(
      Class<X> exceptionType, Function<? super X, ? extends V> fallback, Executor executor) {
    return (FluentFuture<V>) Futures.catching(this, exceptionType, fallback, executor);
  }

  /**
   * Returns a {@code Future} whose result is taken from this {@code Future} or, if this {@code