@Test
    public void test_constructorWithThrowableCause_ChainedErrorsAndExceptions() {
        // Test with mixed Errors and Exceptions in cause chain
        String url = "http://example.com/complex-error";
        String message = "Complex error during crawling";

        NullPointerException innerException = new NullPointerException("Null reference");

        assertTrue(exception instanceof java.io.Serializable);
    }

    @Test
    public void test_getMessage_withComplexCause() {
        // Test getMessage behavior with complex cause structure
        final Exception innerCause = new NullPointerException("NPE occurred");
        final Exception outerCause = new IllegalStateException("State error", innerCause);

    }

    @Test
    public void test_escapeLDAPSearchFilter_withComplexInjectionAttempt() {
        LdapManager ldapManager = new LdapManager();
        ldapManager.init();

        // Complex injection attempt should be fully escaped
        String injectionAttempt = "admin)(|(password=*";
        String expected = "admin\\29\\28|\\28password=\\2a";

        ComponentUtil.setFessConfig(mockConfig);

        try {
            // Add multiple conditions for same field (like in fess_thumbnail.xml)
            // When same key is added multiple times, patterns are combined with |
            generator.addCondition("mimetype", "image/jpeg");
            generator.addCondition("mimetype", "image/png");
            generator.addCondition("mimetype", "image/svg" + "\\" + "+xml");

    }

    @Test
    public void test_constructorWithThrowableCause_MixedErrorAndException() {
        // Test with mixed Error and Exception in cause chain
        String message = "SSO complex failure";
        IllegalStateException innerException = new IllegalStateException("Invalid state");
        OutOfMemoryError middleError = new OutOfMemoryError("Memory exhausted");

        assertEquals("custom_field", queryContext.getDefaultField());

        queryContext.setDefaultField(null);
        assertNull(queryContext.getDefaultField());
    }

    // Test complex scenario with multiple operations
    @Test
    public void test_complexScenario() {
        getMockRequest().setAttribute(Constants.FIELD_LOGS, new HashMap<String, List<String>>());

    public void test_query_complexFessSyntax() {
        final String query = "title:\"security policy\"^2 OR (+security +policy (guide OR document))";
        final IntentDetectionResult result = IntentDetectionResult.search(query, "complex query");

        assertEquals(query, result.getQuery());
    }

    @Test
    public void test_faq_complexFessSyntax() {
        final String query = "+\"OpenSearch\" (configuration OR settings OR config)";

        }
    }

    @Test
    public void test_execute_withComplexBooleanQuery() {
        // Test executing BoostQuery with a complex BooleanQuery containing multiple clauses
        BooleanQuery.Builder boolBuilder = new BooleanQuery.Builder();
        boolBuilder.add(new TermQuery(new Term("title", "fess")), BooleanClause.Occur.MUST);

     *
     * @param <T> the type of the destination class
     * @param src the source bean object
     * @param destClass the class of the destination bean
     * @return a new instance of the destination class with copied properties
     */
    protected static <T> T copyBeanToNewBean(final Object src, final Class<T> destClass) {
        return BeanUtil.copyBeanToNewBean(src, destClass);
    }

    /**

        assertNotSame(unknownException.getMessageCode(), parseException.getMessageCode());
    }

    @Test
    public void test_complexMessageCode() {
        // Setup - test with a complex message code that includes parameters
        final String queryString = "field:value AND (";
        final VaMessenger<FessMessages> complexMessageCode =