* @param exceptionType the exception type that triggers use of {@code fallback}. The exception
   *     type is matched against the input's exception. "The input's exception" means the cause of
   *     the {@link ExecutionException} thrown by {@code input.get()} or, if {@code get()} throws a
   *     different kind of exception, that exception itself. To avoid hiding bugs and other

    }

    /**
     * Closes the stream and deletes the temporary file if it was not retrieved.
     * If an error occurs during file deletion, it is logged but not thrown to avoid
     * masking exceptions from the main operation.
     *
     * @throws IOException if an I/O error occurs during stream closure
     */
    @Override
    public void close() throws IOException {
        try {
            super.close();

        @DisplayName("Should handle close with exception gracefully")
        void shouldHandleCloseExceptionGracefully() throws Exception {
            SmbSession mockSession = mock(SmbSession.class);
            Exception testException = new Exception("Test close exception");
            doThrow(testException).when(mockSession).close();

    PLATFORM {
      @GwtIncompatible
      @J2ktIncompatible
      @Override
      // returns the types available in "normal" environments
      ImmutableMap<Class<? extends Throwable>, Predicate<Throwable>> exceptions() {
        return ImmutableMap.of(
            InvocationTargetException.class,
            e -> e instanceof InvocationTargetException,
            StackOverflowError.class,

        DownloadedArtifact getArtifact();

        /**
         * Returns a mapping of repositories to the exceptions encountered while resolving the artifact.
         *
         * @return A {@link Map} where keys are {@link Repository} instances and values are {@link Exception} instances.
         */
        Map<Repository, List<Exception>> getExceptions();

        /**
         * Returns the repository from which the artifact was resolved.

Sie können benutzerdefinierte <abbr title="Ausnahmebehandler: Funktion, die sich um die Bearbeitung einer Exception kümmert">Exceptionhandler</abbr> mit <a href="https://www.starlette.dev/exceptions/" class="external-link" target="_blank">den gleichen Exception-Werkzeugen von Starlette</a> hinzufügen.

import pytest
from fastapi import APIRouter, FastAPI
from fastapi.exceptions import FastAPIError
from fastapi.testclient import TestClient

app = FastAPI()

router = APIRouter()


@router.get("")
def get_empty():
    return ["OK"]


app.include_router(router, prefix="/prefix")


client = TestClient(app)


def test_use_empty():
    with client:
        response = client.get("/prefix")

If you want to catch exceptions and create a custom response based on that, create a [Custom Exception Handler](../handling-errors.md#install-custom-exception-handlers){.internal-link target=_blank}.

## Dependencies with `yield` and `except` { #dependencies-with-yield-and-except }

     * Verify that all methods can be called with null buffers without
     * throwing exceptions. This test ensures robustness of the implementation.
     */
    @Test
    void methodsHandleNullBuffersGracefully() {
        // Arrange
        TransWaitNamedPipeResponse resp = new TransWaitNamedPipeResponse();
        // Act & Assert - no exceptions should be thrown
        assertDoesNotThrow(() -> resp.writeSetupWireFormat(null, 0));

import importlib

import pytest
from fastapi.exceptions import FastAPIError

from ...utils import needs_py310


@pytest.mark.parametrize(
    "module_name",
    [
        pytest.param("tutorial003_04_py39"),
        pytest.param("tutorial003_04_py310", marks=needs_py310),
    ],
)
def test_invalid_response_model(module_name: str) -> None:
    with pytest.raises(FastAPIError):