void testNullProtocolId() {
        // Protocol ID is a constant in transform header, not settable
        // This test is not applicable - the protocol ID is always TRANSFORM_PROTOCOL_ID
        assertTrue(true);
    }

    @Test
    @DisplayName("Should handle invalid protocol ID length")
    void testInvalidProtocolIdLength() {
        // Protocol ID is a constant in transform header, not settable

- **`CurlRequest`**: Fluent request builder supporting query parameters, headers, body content, GZIP compression, SSL configuration, proxy settings, encoding, threshold, custom connection configuration, and async execution.

- **`CurlResponse`**: Response wrapper implementing `Closeable`. Provides HTTP status code, headers, and content access methods.

		{"DATA", "0", "expect two operands for DATA"},
		{"DATA", "(0), 1", "expect /size for DATA argument"},
		{"DATA", "@B(SB)/4,0", "expected '(', found B"}, // Issue 23580.
		{"DATA", "·A(SB)/4,0", "DATA value must be an immediate constant or address"},
		{"DATA", "·B(SB)/4,$0", ""},
		{"DATA", "·C(SB)/5,$0", "bad int size for DATA argument: 5"},
		{"DATA", "·D(SB)/5,$0.0", "bad float size for DATA argument: 5"},

   * (Function<Object, E> & Serializable) o -> value}.
   *
   * @param value the constant value for the function to return
   * @return a function that always returns {@code value}
   */
  public static <E extends @Nullable Object> Function<@Nullable Object, E> constant(
      @ParametricNullness E value) {
    return new ConstantFunction<>(value);
  }

    // ClassLoader.
    Set<Object> shadowConstants = new HashSet<>();
    for (TestEnum constant : TestEnum.values()) {
      Optional<TestEnum> result = Enums.getIfPresent(shadowTestEnum, constant.name());
      assertThat(result).isPresent();
      shadowConstants.add(result.get());
    }

    // Happy path: values() returns all constants in declaration order
    @Test
    @DisplayName("values() returns all declared constants in order")
    void valuesContainsAllInOrder() {
        RequestParam[] values = RequestParam.values();

        assertNotNull(values, "values() must not return null");
        assertEquals(4, values.length, "There must be exactly 4 constants");
        assertArrayEquals(

                    Arrays.copyOfRange(largeBuffer, 500, 500 + largeEncodedSize));
        }
    }

    @Nested
    @DisplayName("Constants Tests")
    class ConstantsTest {

        @Test
        @DisplayName("Should have correct constant values for PreauthIntegrityNegotiateContext")
        void testPreauthConstants() {
            assertEquals(0x1, PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE);

   * (Function<Object, E> & Serializable) o -> value}.
   *
   * @param value the constant value for the function to return
   * @return a function that always returns {@code value}
   */
  public static <E extends @Nullable Object> Function<@Nullable Object, E> constant(
      @ParametricNullness E value) {
    return new ConstantFunction<>(value);
  }

    }

    @Test
    @DisplayName("Constants: values match Windows error codes")
    void constants_have_expected_values() {
        // Ensure each public constant has its documented numeric value (happy path)
        assertAll(() -> assertEquals(0, WinError.ERROR_SUCCESS), () -> assertEquals(5, WinError.ERROR_ACCESS_DENIED),

        verify(tree).send(eq(request), isNull());
    }

    @ParameterizedTest(name = "send with single param: {0}")
    @EnumSource(RequestParam.class)
    @DisplayName("send handles each RequestParam enum constant")
    void send_eachRequestParam_isAccepted(RequestParam param) throws Exception {
        // Arrange: stub per-call return to ensure interaction with the exact enum