// Verify
        assertNull(result, "Authentication result should be null");
        verify(mockResponse).setHeader("WWW-Authenticate", "NTLM");
        verify(mockResponse).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        verify(mockResponse).setContentLength(0);
        verify(mockResponse).flushBuffer();
    }

    /**

    }

    @Test
    void constructor_shouldInitializeFields() throws Exception {
        // Verify configuration is set
        Field configField = NameServicePacket.class.getDeclaredField("config");
        configField.setAccessible(true);
        assertSame(mockConfig, configField.get(response));

        // Verify queryAddress is set
        Field queryAddressField = NodeStatusResponse.class.getDeclaredField("queryAddress");

        verify(mockRequest, times(1)).getCreditCost(); // Verify method was called once
    }

    @Test
    void testSetRequestCredits() {
        // Test case for setRequestCredits method
        int credits = 5;
        mockRequest.setRequestCredits(credits);

        // Verify that setRequestCredits was called with the correct argument
        verify(mockRequest, times(1)).setRequestCredits(credits);

            message.encode(mockBuffer);

            // Verify key operations happened
            verify(mockBuffer).enc_ndr_small(5); // RPC version
            verify(mockBuffer).enc_ndr_long(0x00000010); // Little-endian / ASCII / IEEE
            verify(mockBuffer).enc_ndr_long(message.call_id);
            verify(mockBuffer).enc_ndr_short(message.getOpnum()); // opnum

        assertNotNull(out);
        assertTrue(out.length > 0);

        // Verify interactions: flags and an empty optimistic token are used
        verify(this.mechContext, times(1)).getFlags();
        ArgumentCaptor<byte[]> cap = ArgumentCaptor.forClass(byte[].class);
        verify(this.mechContext, times(1)).initSecContext(cap.capture(), eq(0), eq(0));

        // Unregister
        client.unregister(registration).get(5, TimeUnit.SECONDS);

        assertEquals(0, client.getActiveRegistrationCount());

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

        client.close();
    }

    @Test
    void testGetWitnessServer() throws Exception {

            handler.handle(WinError.WINERR_CODES[i], WinError.WINERR_MESSAGES[i]);
        }

        // Verify the collaborator is invoked exactly N times
        verify(handler, times(WinError.WINERR_CODES.length)).handle(anyInt(), anyString());

        // Capture one known interaction to verify argument integrity
        ArgumentCaptor<Integer> codeCap = ArgumentCaptor.forClass(Integer.class);

        filter.doFilter(request, response, filterChain);

        verify(response).setStatus(HttpServletResponse.SC_UNAUTHORIZED);
        verify(response).setHeader("WWW-Authenticate", "NTLM");
        verify(response).addHeader("WWW-Authenticate", "Basic realm=\"TestRealm\"");
        verify(filterChain, never()).doFilter(any(), any());
    }

    @Test

        // Act
        handle.close();

        // Assert
        // Verify sendrecv was called once for open and once for close
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcLsarOpenPolicy2.class));
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcLsarClose.class));
    }

    @Test

        ServletRuntimeException runtimeException = new ServletRuntimeException(servletException);

        // Verify that the cause is correctly set
        assertNotNull(runtimeException);
        assertEquals(servletException, runtimeException.getCause());

        // Verify that the message is preserved from the cause
        assertTrue(runtimeException.getMessage().contains(ServletException.class.getName()));