// Try to execute - should be blocked with CIFSException
        CIFSException exception = assertThrows(CIFSException.class, () -> {
            circuitBreaker.executeWithCircuitBreaker(() -> "should not execute");
        }, "Circuit breaker should throw CIFSException when open");

        assertTrue(exception.getMessage().contains("Circuit breaker 'test' is open"), "Exception message should indicate circuit is open");
    }

    @Test

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.dev/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。

import binascii
from base64 import b64decode
from typing import Annotated, Optional

from annotated_doc import Doc
from fastapi.exceptions import HTTPException
from fastapi.openapi.models import HTTPBase as HTTPBaseModel
from fastapi.openapi.models import HTTPBearer as HTTPBearerModel
from fastapi.security.base import SecurityBase
from fastapi.security.utils import get_authorization_scheme_param
from pydantic import BaseModel

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,

import java.util.Enumeration;
import java.util.InvalidPropertiesFormatException;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.codelibs.core.exception.FileAccessException;
import org.codelibs.core.exception.IORuntimeException;

/**
 * The {@code DynamicProperties} class extends {@link Properties} to provide dynamic
 * loading and storing of properties from a file. It monitors the file for changes

    @DisplayName("Methods should handle empty buffer")
    void testMethodsWithEmptyBuffer() {
        // Arrange
        byte[] emptyBuffer = new byte[0];

        // Act & Assert - These should not throw exceptions
        assertEquals(0, response.writeSetupWireFormat(emptyBuffer, 0));
        assertEquals(0, response.writeParametersWireFormat(emptyBuffer, 0));
        assertEquals(0, response.writeDataWireFormat(emptyBuffer, 0));

            logger.debug("Crawling access exception at url: {}", urlQueue.getUrl(), e);
        } else if (e.isInfoEnabled()) {
            logger.info(e.getMessage());
        } else if (e.isWarnEnabled()) {
            logger.warn("Crawling access exception at url: {}", urlQueue.getUrl(), e);
        } else if (e.isErrorEnabled()) {
            logger.error("Crawling access exception at url: {}", urlQueue.getUrl(), e);
        }

        assertEquals(0, response.readDataWireFormat(emptyBuffer, 0, 0));

        // readParametersWireFormat would throw exception due to buffer underflow
        assertThrows(Exception.class, () -> {
            response.readParametersWireFormat(emptyBuffer, 0, 0);
        });
    }

    @Test
    @DisplayName("Test inherited behavior from parent class")

        }

        @Test
        @DisplayName("Should throw exception on null buffer")
        void testEncodeWithNullBuffer() {
            assertThrows(IllegalArgumentException.class, () -> testRequest.encode(null, 0), "Should throw exception for null buffer");
        }

        @Test
        @DisplayName("Should throw exception on negative index")
        void testEncodeWithNegativeIndex() {

  /** Calls threadFail with message "should throw exception". */
  public void threadShouldThrow() {
    threadFail("should throw exception");
  }

  /** Calls threadFail with message "should throw" + exceptionName. */
  public void threadShouldThrow(String exceptionName) {
    threadFail("should throw " + exceptionName);
  }

  /**