return this;
  }

  /**
   * Tests that the forwarding wrapper returned by {@code wrapperFunction} properly forwards method
   * calls with parameters passed as is, return value returned as is, and exceptions propagated as
   * is.
   */
  public <T> void testForwarding(
      Class<T> interfaceType, Function<? super T, ? extends T> wrapperFunction) {
    checkNotNull(wrapperFunction);

        // Test polymorphic behavior
        SearchLogEvent[] events = { event1, event2, event3 };

        for (SearchLogEvent event : events) {
            // All methods should be callable without exceptions
            String id = event.getId();
            Long version = event.getVersionNo();
            Map<String, Object> source = event.toSource();
            String type = event.getEventType();

                }
              });
          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertNull(
        "exceptions should not be propagated to uncaught exception handlers",
        thrownByExecutionThread);
  }

  public void testServiceStartStop() throws Exception {
    WaitOnRunService service = new WaitOnRunService();

    - how-to/testing-database.md
- Reference (Code API):
  - reference/index.md
  - reference/fastapi.md
  - reference/parameters.md
  - reference/status.md
  - reference/uploadfile.md
  - reference/exceptions.md
  - reference/dependencies.md
  - reference/apirouter.md
  - reference/background.md
  - reference/request.md
  - reference/websockets.md
  - reference/httpconnection.md
  - reference/response.md

        byte[] b = new byte[] { 10, 11, 12 };
        spyTarget.send(b, 1, 2);
        verify(out).writeDirect(b, 1, 2, 1);
    }

    @Test
    @DisplayName("sendrecv with null buffers throws relevant exceptions")
    void testSendRecvInvalidInputs() throws CIFSException {
        // Null out buffer for SMB2 path -> expect NPE when building request
        when(pipe.ensureTreeConnected()).thenReturn(tree);

      return false;
    }
    return true;
  }

  /** Strategy for exception type matching used by {@link NullPointerTester}. */
  private enum ExceptionTypePolicy {

    /**
     * Exceptions should be {@link NullPointerException} or {@link UnsupportedOperationException}.
     */
    NPE_OR_UOE() {
      @Override
      public boolean isExpectedType(Throwable cause) {

おそらくコードの中で直接使用する必要はないでしょう。

しかし、高度なシナリオのために必要な場合には、カスタムヘッダーを追加することができます:

{* ../../docs_src/handling_errors/tutorial002.py hl[14] *}

## カスタム例外ハンドラのインストール

カスタム例外ハンドラは<a href="https://www.starlette.io/exceptions/" class="external-link" target="_blank">Starletteと同じ例外ユーティリティ</a>を使用して追加することができます。

あなた（または使用しているライブラリ）が`raise`するかもしれないカスタム例外`UnicornException`があるとしましょう。

そして、この例外をFastAPIでグローバルに処理したいと思います。

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response

    public void tearDown() throws Exception {
        if (thumbnailManager != null) {
            try {
                thumbnailManager.destroy();
            } catch (Exception e) {
                // Ignore exceptions during teardown
            }
        }
        if (tempDir != null && tempDir.exists()) {
            deleteDirectory(tempDir);
        }
        super.tearDown();
    }

var keyInPolicyExceptions = map[string]bool{
	xhttp.AmzSignature: true,
	"File":             true,
	"Policy":           true,

	// MinIO specific exceptions to the general S3 rule above.
	encrypt.SseKmsKeyID:          true,
	encrypt.SseEncryptionContext: true,
	encrypt.SseCustomerAlgorithm: true,
	encrypt.SseCustomerKey:       true,
	encrypt.SseCustomerKeyMD5:    true,