queryContext = new QueryContext("test", true);
        queryContext.addFieldLog("field", "new");

        List<String> list = fieldLogMap.get("field");
        assertEquals(2, list.size());
        assertEquals("existing", list.get(0));
        assertEquals("new", list.get(1));
    }

    // Test addFieldLog with new field
    @Test
    public void test_addFieldLog_newField() {

        super.setUp(testInfo);
        chatApiManager = new ChatApiManager();
    }

    @Test
    public void test_defaultConstructor() {
        final ChatApiManager manager = new ChatApiManager();
        assertNotNull(manager);
    }

    @Test
    public void test_matches_ragChatDisabled() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

        // Setup mock SearchLogHelper that throws nested exception
        SearchLogHelper mockSearchLogHelper = new SearchLogHelper() {
            @Override
            public void storeSearchLog() {
                Exception cause = new IllegalArgumentException("Root cause");
                throw new RuntimeException("Wrapper exception", cause);
            }
        };

        assertEquals(999, groupPager.getCurrentPageNumber());
        List<Integer> pageNumberList = new ArrayList<Integer>(1);
        groupPager.setPageNumberList(pageNumberList);
        assertEquals(pageNumberList, groupPager.getPageNumberList());

    }

    public void test_clear() {
        GroupPager groupPager = new GroupPager();
        groupPager.id = "testId";
        groupPager.name = "testName";

        StorageException exception2 = new StorageException("NPE", new NullPointerException("Null reference"));
        assertTrue(exception2.getCause() instanceof NullPointerException);

        StorageException exception3 = new StorageException("Custom", new FessSystemException("System error"));
        assertTrue(exception3.getCause() instanceof FessSystemException);
    }

        super.setUp(testInfo);
        mimeTypeHelper = new FessMimeTypeHelper();
    }

    @Override
    protected void tearDown(TestInfo testInfo) throws Exception {
        ComponentUtil.setFessConfig(null);
        super.tearDown(testInfo);
    }

    @Test
    public void test_init_emptyConfig() throws IOException {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

    @Test
    public void test_nestedCause() {
        // Test with nested exceptions
        RuntimeException rootCause = new RuntimeException("Root cause");
        ParseException parseException = new ParseException("Parse error");
        parseException.initCause(rootCause);
        QueryParseException queryParseException = new QueryParseException(parseException);

        assertEquals(parseException, queryParseException.getCause());

        assertEquals(message, exception.getMessage());
        assertEquals(cause, exception.getCause());
    }

    @Test
    public void test_constructor_withCause() {
        // Test constructor with cause only
        Throwable cause = new IllegalArgumentException("Cause exception");
        FessSystemException exception = new FessSystemException(cause);

        final List<PathMapping> pathMappingList = new ArrayList<PathMapping>();

        final PathMapping pathMapping1 = new PathMapping();
        pathMapping1.setRegex("file:///home/");
        pathMapping1.setReplacement("http://localhost/");
        pathMappingList.add(pathMapping1);

        final PathMapping pathMapping2 = new PathMapping();
        pathMapping2.setRegex("http://localhost/");

        super.setUp(testInfo);
        crawler = new Crawler();

        // Initialize mock components
        searchEngineClient = new SearchEngineClient() {
            // Mock implementation
        };
        crawler.searchEngineClient = searchEngineClient;

        webFsIndexHelper = new WebFsIndexHelper() {
            @Override