// First sign
        digest.sign(data, 0, data.length, mockRequest, mockResponse);
        verify(mockRequest).setSignSeq(100);
        verify(mockResponse).setSignSeq(101);

        // Second sign - sequence should have incremented by 2
        ServerMessageBlock mockRequest2 = mock(ServerMessageBlock.class);
        ServerMessageBlock mockResponse2 = mock(ServerMessageBlock.class);

        negotiation = new SmbNegotiation(mockRequest, mockResponse, testRequestBuffer, testResponseBuffer);
    }

    @Test
    @DisplayName("Constructor should properly initialize all fields")
    void testConstructor() {
        // Verify all fields are properly initialized
        assertNotNull(negotiation);
        assertSame(mockRequest, negotiation.getRequest());
        assertSame(mockResponse, negotiation.getResponse());

        // 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();
    }

    /**

        WitnessRegisterResponse mockResponse = mock(WitnessRegisterResponse.class);
        lenient().when(mockResponse.isSuccess()).thenReturn(true);
        lenient().when(mockResponse.getRegistrationId()).thenReturn("test-reg-123");

        WitnessRpcClient mockRpc = mock(WitnessRpcClient.class);
        lenient().when(mockRpc.register(any(WitnessRegisterRequest.class))).thenReturn(mockResponse);

    class InterfaceTests {

        private TreeConnectResponse mockResponse;

        @BeforeEach
        void setUp() {
            mockResponse = mock(TreeConnectResponse.class);
        }

        @Test
        @DisplayName("Should return tree ID")
        void testGetTid() {
            // Given
            when(mockResponse.getTid()).thenReturn(12345);

            // When

     */
    private void mockResponse(int code, String message, Map<String, List<String>> headers, InputStream errorStream) throws IOException {
        mockResponse(this.mockConnection, code, message, headers, errorStream);
    }

    /**
     * Helper method to mock the response of a specific HttpURLConnection instance.
     */

    void testConstructorWithMockConfig() {
        // Test constructor with mock configuration
        Trans2SetFileInformationResponse mockResponse = new Trans2SetFileInformationResponse(mockConfig);
        assertNotNull(mockResponse);
        assertEquals(SmbComTransaction.TRANS2_SET_FILE_INFORMATION, mockResponse.getSubCommand());
    }

    @Test
    @DisplayName("Test writeSetupWireFormat returns 0")
    void testWriteSetupWireFormat() {

        }

        @Test
        @DisplayName("Test response property")
        void testResponseProperty() {
            testBlock.setResponse(mockResponse);
            assertEquals(mockResponse, testBlock.getResponse());
        }

        @Test
        @DisplayName("Test set response with non-ServerMessageBlock throws exception")
        void testSetResponseWithInvalidType() {

    @Mock
    private Configuration mockConfig;

    @Mock
    private CIFSContext mockContext;

    @Mock
    private Smb2SigningDigest mockDigest;

    @Mock
    private ServerMessageBlock2Response mockResponse;

    private TestServerMessageBlock2Request testRequest;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        testRequest = new TestServerMessageBlock2Request(mockConfig);

class ServerMessageBlock2Test {

    @Mock
    private Configuration mockConfig;

    @Mock
    private Smb2SigningDigest mockDigest;

    @Mock
    private ServerMessageBlock2Response mockResponse;

    private TestServerMessageBlock2 testMessage;

    // Test implementation of abstract class
    private static class TestServerMessageBlock2 extends ServerMessageBlock2 {
        private int bytesWritten = 0;