private Target nullSingleton;

  @Override
  public void setUp() throws Exception {
    super.setUp();

    empty = new Target(emptyCollection(), "empty");
    /*
     * We test that nullSingleton.retainAll(disjointList) does NOT throw a
     * NullPointerException when disjointList does not, so we can't use
     * MinimalCollection, which throws NullPointerException on calls to
     * contains(null).
     */

    void testRun_closeThrowsException() throws CIFSException {
        // Create a spy on the context to make close() throw an exception
        TestAbstractCIFSContext spyContext = new TestAbstractCIFSContext(mockCredentials) {
            @Override
            public boolean close() throws CIFSException {
                super.close(); // Call original close to set closeCalled
                throw new CIFSException("Test exception during close");

    if (key == null) {
      throw new NullPointerException("null key in entry: null=" + value);
    } else if (value == null) {
      throw new NullPointerException("null value in entry: " + key + "=null");
    }
  }

  @CanIgnoreReturnValue
  static int checkNonnegative(int value, String name) {
    if (value < 0) {
      throw new IllegalArgumentException(name + " cannot be negative but was: " + value);

     *
     * @param accessResult the access result to store
     * @throws CrawlerSystemException if the access result is null or already exists
     */
    @Override
    public void store(final AccessResultImpl<Long> accessResult) {
        if (accessResult == null) {
            throw new CrawlerSystemException("AccessResult is null.");
        }

        synchronized (idCountLock) {

            @Override
            public Integer call() throws Exception {
              runLatch.countDown();
              taskLatch.await();
              if (throwException) {
                throw new IllegalStateException("Fail");
              }
              return 25;
            }
          });

  @Override
  protected void setUp() throws Exception {
    super.setUp();

    exec = newCachedThreadPool();

     * @return The IndexResponse from OpenSearch.
     * @throws OpenSearchAccessException if the insertion fails.
     * @throws CrawlingAccessException if there's a conflict during insertion.
     */
    protected IndexResponse insert(final Object target, final OpType opType) {
        final String url = getUrl(target);
        if (url == null) {
            throw new OpenSearchAccessException("url is null.");
        }

        verify(tree, never()).hasCapability(anyInt()); // not checked on SMB2
    }

    // SMB1 path: without CAP_NT_SMBS it should throw SmbUnsupportedOperationException
    @Test
    @DisplayName("watch() SMB1 without capability throws unsupported")
    void watch_smb1_noCapability_throwsUnsupported() throws Exception {
        when(handle.isValid()).thenReturn(true);
        when(handle.getTree()).thenReturn(tree);

    /**
     * Test the service method with a valid NTLM Authorization header.
     * Simulates a successful NTLM authentication.
     * @throws ServletException
     * @throws IOException
     * @throws CIFSException
     */
    @Test
    void testService_NtlmAuth_Success() throws Exception {
        ntlmServlet.init(servletConfig);
        setupMocksForAuth();

        byte[] challenge = new byte[8];

     *
     * @param token the authorization data token
     * @param keys map of Kerberos keys indexed by key type
     * @throws PACDecodingException if decoding fails
     */
    public KerberosRelevantAuthData(byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {
        ASN1Sequence authSequence;
        try {

        assertEquals(lastName.toUpperCase(), writtenLastName);
    }

    @Test
    @DisplayName("Test writeParametersWireFormat with null lastName for NET_SERVER_ENUM3 throws NPE")
    void testWriteParametersWireFormatNetServerEnum3NullLastName() throws Exception {
        String domain = "WORKGROUP";
        int serverTypes = NetServerEnum2.SV_TYPE_ALL;

        netServerEnum2 = new NetServerEnum2(realConfig, domain, serverTypes);