@Test
    public void test_multipleRegistrations() {
        testScriptEngine.register();
        testScriptEngine.register(); // Register again

        // Should still work without errors
        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testEngine");
        assertNotNull(retrieved);
        assertEquals(testScriptEngine, retrieved);
    }

///

/// info | 정보

이 예시에서 `X-Key`와 `X-Token`이라는 커스텀 헤더를 만들어 사용했습니다.

그러나 실제로 보안을 구현할 때는 통합된 [보안 유틸리티 (다음 챕터)](../security/index.md)를 사용하는 것이 더 많은 이점을 얻을 수 있습니다.

///

## 의존성 오류와 값 반환하기 { #dependencies-errors-and-return-values }

평소에 사용하던대로 같은 의존성 *함수*를 사용할 수 있습니다.

### 의존성 요구사항 { #dependency-requirements }

(헤더같은) 요청 요구사항이나 하위-의존성을 선언할 수 있습니다:

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

使用路径装饰器依赖项还可以避免开发新人误会代码中包含无用的未使用参数。

///

/// info | 信息

本例中，使用的是自定义响应头 `X-Key` 和 `X-Token`。

但实际开发中，尤其是在实现安全措施时，最好使用 FastAPI 内置的[安全工具（下一章）](../security/index.md)。

///

## 依赖项错误和返回值 { #dependencies-errors-and-return-values }

路径装饰器依赖项也可以使用普通的依赖项*函数*。

### 依赖项的需求项 { #dependency-requirements }

路径装饰器依赖项可以声明请求的需求项（比如响应头）或其他子依赖项：

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

   *
   * @return a {@code String} containing the contents of the line, not including any
   *     line-termination characters, or {@code null} if the end of the stream has been reached.
   * @throws IOException if an I/O error occurs
   */
  @CanIgnoreReturnValue // to skip a line
  public @Nullable String readLine() throws IOException {
    while (lines.peek() == null) {
      Java8Compatibility.clear(cbuf);

     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#renewCredentials(java.lang.String, java.lang.Throwable)
     */
    @Override
    public boolean renewCredentials(final String locationHint, final Throwable error) {
        return false;
    }

    /**
     * {@inheritDoc}
     *
     *
     * @see jcifs.CIFSContext#close()
     */
    @Override
    public boolean close() throws CIFSException {

        assertNull(exception.getCause(), "Cause should be null when not specified");
    }

    @ParameterizedTest
    @DisplayName("Message constructor should handle crypto-specific error messages")
    @NullAndEmptySource
    @ValueSource(strings = { "AES encryption not supported", "Missing Bouncy Castle provider", "Invalid key length for AES-128",

            reverseName = true;
            name = name.substring(1);
        }

        if (name == null || name.length() <= 0) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                    .setMessage("The property name is required to activate the profile " + profile.getId())
                    .setLocation(property.getLocation("")));
            return false;
        }

			t.Errorf("Matcher Case %d failed", i)
		}
	}

	evalCases := []struct {
		iText, iPat   string
		iEsc          rune
		matchExpected bool
		errExpected   error
	}{
		{"abcd", "abc", runeZero, false, nil},
		{"abcd", "abcd", runeZero, true, nil},
		{"abcd", "abc_", runeZero, true, nil},
		{"abcd", "_bdd", runeZero, false, nil},
		{"abcd", "_b_d", runeZero, true, nil},

        default:
            break;
        }
        return OptionalEntity.empty();
    }

    /**
     * Create a char mapping item.
     * @param form The create form.
     * @param hook The error hook.
     * @return An optional entity of a char mapping item.
     */
    protected OptionalEntity<CharMappingItem> createCharMappingItem(final CreateForm form, final VaErrorHook hook) {
        try {

        val reason =
          when (value) {
            in 100..199 -> "Informational"
            in 200..299 -> "OK"
            in 300..399 -> "Redirection"
            in 400..499 -> "Client Error"
            in 500..599 -> "Server Error"
            else -> "Mock Response"
          }
        status = "HTTP/1.1 $value $reason"
      }

    private var headers_: Headers.Builder
    public val headers: Headers