void testRenewCredentials_NtlmAuthenticatorReturnsNull() {
        try (MockedStatic<NtlmAuthenticator> mockedNtlmAuthenticator = mockStatic(NtlmAuthenticator.class)) {
            mockedNtlmAuthenticator.when(NtlmAuthenticator::getDefault).thenReturn(mockNtlmAuthenticator);
            mockedNtlmAuthenticator.when(

        filter = new NtlmHttpFilter();

        // Setup lenient stubs for common mock interactions
        lenient().when(request.getSession()).thenReturn(httpSession);
        lenient().when(request.getSession(anyBoolean())).thenReturn(httpSession);
        lenient().when(response.getOutputStream()).thenReturn(servletOutputStream);
    }

    @Test
    void testInit_success() throws ServletException {

        NetbiosAddress mockNetbiosAddress20 = mock(NetbiosAddress.class);
        when(mockNetbiosAddress20.getNameType()).thenReturn(0x20);
        when(mockNetbiosAddress20.getHostName()).thenReturn("ACTUAL_SERVER_NAME");

        NetbiosAddress[] nodeStatusResponse = { mock(NetbiosAddress.class), mockNetbiosAddress20 };
        when(mockNameServiceClient.getNodeStatus(nbtAddress)).thenReturn(nodeStatusResponse);

    }

    @Test
    void testSingleChannelSelection() {
        when(mockChannelManager.getHealthyChannels()).thenReturn(Collections.singletonList(channel1));

        ChannelInfo selected = loadBalancer.selectChannel(mockMessage);
        assertEquals(channel1, selected);
    }

    @Test
    void testNoChannelsAvailable() {
        when(mockChannelManager.getHealthyChannels()).thenReturn(Collections.emptyList());

     * The error's stacktrace will be output when this error level is enabled.
     *
     * @param content
     * @param error
     */
    void debug(CharSequence content, Throwable error);

    /**
     * Send an exception to the user in the <b>debug</b> error level.<br>
     * The stack trace for this exception will be output when this error level is enabled.
     *
     * @param error
     */

        when(mockSearchResponse.getScrollId()).thenReturn("scroll1", "scroll1");
        when(mockSearchResponse.getHits()).thenReturn(mockSearchHits);
        when(mockSearchHits.getHits()).thenReturn(new SearchHit[] { mockHit }, new SearchHit[0]);
        when(mockHit.getIndex()).thenReturn("test-index");
        when(mockHit.getId()).thenReturn("doc1");

        when(request.cwd()).thenReturn(workingDirectory);
        when(request.installationDirectory()).thenReturn(Paths.get("/maven"));
        when(request.userHomeDirectory()).thenReturn(Paths.get("/home/user"));
        when(request.topDirectory()).thenReturn(workingDirectory);
        when(request.rootDirectory()).thenReturn(Optional.empty());
        when(request.userProperties()).thenReturn(Map.of());

     */
    @Test
    void testGetKey_KeyExists() throws LoginException {
        when(key1.getKeyType()).thenReturn(KEY_TYPE_1);
        when(key2.getKeyType()).thenReturn(KEY_TYPE_2);
        Set<Object> privateCredentials = new HashSet<>();
        privateCredentials.add(key1);
        privateCredentials.add(key2);
        when(subject.getPrivateCredentials()).thenReturn(privateCredentials);

        jcifs.SID mockSid1 = mock(jcifs.SID.class);
        jcifs.SID mockSid2 = mock(jcifs.SID.class);
        jcifs.SID mockSid3 = mock(jcifs.SID.class);
        when(mockSid1.unwrap(sid_t.class)).thenReturn(mockSidT);
        when(mockSid2.unwrap(sid_t.class)).thenReturn(mockSidT);
        when(mockSid3.unwrap(sid_t.class)).thenReturn(mockSidT);
        testSids = new jcifs.SID[] { mockSid1, mockSid2, mockSid3 };

        // Act

    call: Call,
  ) {}

  /**
   * Invoked when a connection is released as no longer required.
   */
  open fun connectionClosed(connection: Connection) {}

  /**
   * Invoked when a call is assigned a particular connection.
   */
  open fun connectionAcquired(
    connection: Connection,
    call: Call,
  ) {}

  /**
   * Invoked when a call no longer uses a connection.
   */