assertTrue(result);
            assertFalse(response.isVerifyFailed());
        }

        @Test
        @DisplayName("Should handle signature verification failure")
        void testVerifySignatureFailure() {
            byte[] buffer = new byte[100];
            response.setDigest(mockDigest);
            when(mockDigest.verify(buffer, 0, 100, 0, response)).thenReturn(true);

        // Should be an error status (0xC prefix)
        assertTrue((status & (int) 0xC0000000L) == (int) 0xC0000000L);
    }

    @Test
    @DisplayName("Should handle authentication failure status")
    void testAuthenticationFailureStatus() {
        // Given
        int status = NtStatus.NT_STATUS_LOGON_FAILURE;

        // When/Then
        assertEquals((int) 0xC000006DL, status);

        verify(mockRpc).register(any(WitnessRegisterRequest.class));

        client.close();
    }

    @Test
    void testFailedRegistration() throws Exception {
        // Setup mock RPC response for failure
        WitnessRegisterResponse mockResponse = mock(WitnessRegisterResponse.class);
        when(mockResponse.isSuccess()).thenReturn(false);
        when(mockResponse.getError()).thenReturn("Registration failed");

          </excludePackageNames>
          <!-- Ignore some tags that are found in Java 11 sources but not recognized... under -source 8, I think it was? I can no longer reproduce the failure. -->
          <tags>
            <tag>
              <name>apiNote</name>
              <placement>X</placement>
            </tag>
            <tag>
              <name>implNote</name>

                                    final Map<String, Object> req = docList.get(i);
                                    final Failure failure = resp.getFailure();
                                    logger.debug("Failed Request: {}\n=>{}", req, failure.getMessage());
                                }
                            }
                        }
                    }

     *
     * <p>The thread manages:</p>
     * <ul>
     *   <li>Data store initialization and document processing</li>
     *   <li>Index update operations through callbacks</li>
     *   <li>Error handling and failure logging</li>
     *   <li>Cleanup of old documents after successful crawling</li>
     * </ul>
     */
    protected static class DataCrawlingThread extends Thread {

   * to {@code contains(null)} is permitted to throw a {@code NullPointerException}.
   *
   * @param message message to use upon assertion failure
   */
  protected void expectNullMissingWhenNullUnsupported(String message) {
    try {
      assertFalse(message, actualContents().contains(null));
    } catch (NullPointerException tolerated) {
      // Tolerated

  private final AtomicReference<Throwable> threadFailure = new AtomicReference<>(null);

  /**
   * Records an exception so that it can be rethrown later in the test harness thread, triggering a
   * test case failure. Only the first failure is recorded; subsequent calls to this method from
   * within the same test have no effect.
   */
  public void threadRecordFailure(Throwable t) {
    threadFailure.compareAndSet(null, t);
  }

            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) {

        assertTrue(ex.getMessage().contains("Invalid kerberos request"));
    }

    @Test
    @DisplayName("seq ctor: unknown field tag causes failure")
    void sequenceConstructor_unknownField_throws() {
        // Arrange: only an unexpected tag is present
        ASN1EncodableVector v = new ASN1EncodableVector();