when(locator.getType()).thenReturn(SmbConstants.TYPE_WORKGROUP);
        when(locator.getURL()).thenReturn(createSmbURL("smb://"));

        // Mock successful but empty response
        when(treeHandle.send(any(), any(), (RequestParam[]) any())).thenAnswer(invocation -> {
            // The response is the second argument
            Object response = invocation.getArgument(1);

        assertTrue(processor.isSuccessful(responseData));

        responseData.setHttpStatusCode(100);
        assertFalse(processor.isSuccessful(responseData));
        responseData.setHttpStatusCode(304);
        assertFalse(processor.isSuccessful(responseData));
        responseData.setHttpStatusCode(404);
        assertFalse(processor.isSuccessful(responseData));
    }

    public WitnessUnregisterResponse() {
        // Default constructor
    }

    private int returnCode;
    private String error;

    /**
     * Checks if the unregistration was successful.
     *
     * @return true if successful
     */
    public boolean isSuccess() {
        return returnCode == 0;
    }

    /**
     * Gets a human-readable error description.
     *
     * @return the error description

    void testClose_Successful() throws IOException {
        // Test case: close() when opened and successful MsrpcSamrCloseHandle
        String server = "testServer";
        int access = 123;

        // Setup for successful constructor
        doNothing().when(mockHandle).sendrecv(any(MsrpcSamrConnect4.class));

        // Setup for successful close

        idx += 4;
        SMBUtil.writeInt4(maxFragmentedSize, data, idx);

        return data;
    }

    /**
     * Check if negotiation was successful
     *
     * @return true if successful
     */
    public boolean isSuccess() {
        return status == STATUS_SUCCESS;
    }

    // Getters and setters

    /**

    @Test
    void testUnregistration() throws Exception {
        // Setup successful registration
        WitnessRegisterResponse registerResponse = mock(WitnessRegisterResponse.class);
        lenient().when(registerResponse.isSuccess()).thenReturn(true);
        lenient().when(registerResponse.getRegistrationId()).thenReturn("test-reg-123");

        // Setup successful unregistration

    }

    @Test
    void constructor_shouldOpenDomainSuccessfully() throws IOException {
        // Arrange
        int access = 0x01; // Example access value
        // Simulate successful RPC call
        doAnswer(invocation -> {
            MsrpcSamrOpenDomain rpc = invocation.getArgument(0);
            rpc.retval = 0; // Success
            return null;

        });
    }

    /**
     * Upload a stopwords file.
     *
     * @param form the upload form containing the file and dictionary ID
     * @return HTML response redirecting to the list page after successful upload
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse upload(final UploadForm form) {
        validate(form, messages -> {}, () -> uploadpage(form.dictId));

/**
 * Tests for the {@link ASN1Util} class.
 */
class ASN1UtilTest {

    // --- as(Class, Object) ---

    @Test
    void testAs_Object_Success() throws PACDecodingException {
        // Test successful casting
        String expected = "test string";
        Object obj = expected;
        String result = ASN1Util.as(String.class, obj);
        assertSame(expected, result);
    }

    @Test

**Key Test Areas**:
- Resource closure on successful extraction (MS Office extractors)
- Resource closure on failed extraction
- Improved error messages with context
- Input validation using `validateInputStream()`

**Covered Extractors**:
- MsWordExtractor
- MsExcelExtractor
- MsPowerPointExtractor
- TextExtractor

**Test Count**: 8 tests

**Key Scenarios**:
- ✅ Successful extraction closes resources properly