PreauthIntegrityContext context = preauthService.initializeSession(sessionId, salt, PreauthIntegrityService.HASH_ALGO_SHA512);
        assertTrue(context.isValid());

        // Simulate validation failure (context should be invalidated)
        byte[] incorrectHash = new byte[64];
        secureRandom.nextBytes(incorrectHash);

        try {
            preauthService.validatePreauthIntegrity(sessionId, incorrectHash);

	// Call the ServeHTTP to execute the handler.
	apiRouter.ServeHTTP(rec, req)
	switch rec.Code {
	case http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent:
		t.Fatalf("Test %v: expected failure, but succeeded with %v", instanceType, rec.Code)
	}

	// Verify response of the V2 signed HTTP request.
	// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.

            assertEquals(0x9ABC, testBlock.getUid());
            assertEquals(0xDEF0, testBlock.getMid());
        }

        @Test
        @DisplayName("Test decode with signature verification failure")
        void testDecodeWithSignatureFailure() {
            testBlock = new TestServerMessageBlock(mockConfig) {
                @Override
                public boolean verifySignature(byte[] buffer, int i, int size) {

                id = name
                executionMode = ExecutionMode.RUN_ONLY_ON_FAILURE
                conditions {
                    equals("teamcity.build.step.status.$GRADLE_RUNNER_STEP_NAME", "failure")
                    equals("teamcity.build.step.status.$GRADLE_RETRY_RUNNER_STEP_NAME", "success")
                }
                scriptContent =
                    """

    }

    /**
     * Deletes a web configuration setting by ID.
     *
     * @param id the ID of the web configuration setting to delete
     * @return JSON response indicating success or failure
     */
    // DELETE /api/admin/webconfig/setting/{id}
    @Execute
    public JsonResponse<ApiResult> delete$setting(final String id) {
        webConfigService.getWebConfig(id).ifPresent(entity -> {

     *
     * @param userMessage the user's original message
     * @param failedQuery the query that failed
     * @param failureReason the reason for failure ("no_results" or "no_relevant_results")
     * @param history the conversation history
     * @return a new query string, or the userMessage if regeneration fails
     */

        throw new NullPointerException("at index " + i);
      }
      list.add(element);
    }
    equalityGroups.add(list);
    return this;
  }

  /** Run tests on equals method, throwing a failure on an invalid test */
  @CanIgnoreReturnValue
  public EqualsTester testEquals() {
    RelationshipTester<Object> delegate =
        new RelationshipTester<>(

   *    has since been closed by the server.
   *  * A client timeout (HTTP 408).
   *  * A authorization challenge (HTTP 401 and 407) that is satisfied by the [Authenticator].
   *  * A retryable server failure (HTTP 503 with a `Retry-After: 0` response header).
   *  * A misdirected request (HTTP 421) on a coalesced connection.
   */
  open fun isOneShot(): Boolean = false

  /**

        List<E> resultsForStrategy = new ArrayList<>();
        strategy.forEach(spliteratorSupplier.get(), resultsForStrategy::add);

        // TODO(cpovirk): better failure messages
        if ((characteristics & Spliterator.NONNULL) != 0) {
          assertFalse(resultsForStrategy.contains(null));
        }
        if ((characteristics & Spliterator.SORTED) != 0) {

    } catch (AssertionFailedError expected) {
      for (String message : expectedMessages) {
        assertThat(expected).hasMessageThat().contains(message);
      }
      return;
    }
    fail("expected failure not reported");
  }

  private static class ForwardingRunnable implements Runnable {

    private final Runnable runnable;

    ForwardingRunnable(Runnable runnable) {
      this.runnable = runnable;