CharMappingItem item = new CharMappingItem(1L, inputs, "output");

        assertEquals("a,b,c=>output", item.toLineString());
    }

    @Test
    public void test_toLineString_withUpdates() {
        String[] inputs = { "old1", "old2" };
        CharMappingItem item = new CharMappingItem(1L, inputs, "oldOutput");

        item.setNewInputs(new String[] { "new1", "new2", "new3" });

        super.setUp(testInfo);
        userService = new UserService();
    }

    @Test
    public void test_defaultConstructor() {
        final UserService service = new UserService();
        assertNotNull(service);
    }

    @Test
    public void test_userPager_initialization() {
        final UserPager pager = new UserPager();
        assertNull(pager.id);

    }

    // Test execute method with valid FuzzyQuery
    @Test
    public void test_execute_withFuzzyQuery() {
        QueryContext context = new QueryContext("test", false);
        Term term = new Term("title", "fuzzy");
        FuzzyQuery fuzzyQuery = new FuzzyQuery(term);
        float boost = 1.5f;

        QueryBuilder result = fuzzyQueryCommand.execute(context, fuzzyQuery, boost);
        assertNotNull(result);

    }

        try (RankFusionProcessor processor = new RankFusionProcessor()) {
            processor.setSearcher(new TestSearcher(50));
            processor.init();

            // Replace with new searcher
            processor.setSearcher(new TestSearcher(100));

            final List<Map<String, Object>> results = processor.search("*", new TestSearchRequestParams(0, 10, 0), OptionalThing.empty());

        super.setUp(testInfo);
        ScriptEngineFactory scriptEngineFactory = new ScriptEngineFactory();
        ComponentUtil.register(scriptEngineFactory, "scriptEngineFactory");
        new AbstractScriptEngine() {

            @Override
            public Object evaluate(String template, Map<String, Object> paramMap) {
                final Map<String, Object> bindingMap = new HashMap<>(paramMap);

            }
        };

        callback.store(new DataStoreParams(), new HashMap<>());
        assertEquals(1L, callback.getDocumentSize());
    }

    @Test
    public void test_commit_behavior() {
        // Test commit behavior with state tracking
        final AtomicInteger commitCount = new AtomicInteger(0);
        final AtomicLong documentsBeforeCommit = new AtomicLong(0);

        List<LogNotificationEvent> events = new ArrayList<>();
        events.add(new LogNotificationEvent(base, "ERROR", "org.test.A", "first", null));
        events.add(new LogNotificationEvent(base + 1000, "WARN", "org.test.B", "second", null));
        events.add(new LogNotificationEvent(base + 2000, "ERROR", "org.test.C", "third", null));

        String details = testableJob.testFormatDetails(events);

        // Test with different types of causes
        DataStoreException withIOException = new DataStoreException("IO Error", new java.io.IOException("File not found"));
        DataStoreException withNPE = new DataStoreException("NPE Error", new NullPointerException("Null value"));
        DataStoreException withCustom = new DataStoreException("Custom Error", new FessSystemException("System error"));

        Exception innerException = new IllegalArgumentException("Invalid argument");
        Error middleError = new AssertionError("Assertion failed", innerException);
        RuntimeException outerException = new RuntimeException("Outer error", middleError);
        ThumbnailGenerationException exception = new ThumbnailGenerationException(message, outerException);

                throw new RuntimeException("Crawling error");
            }
        };

        SearchLogService searchLogService = new SearchLogService() {
            @Override
            public void deleteBefore(int days) {
                throw new RuntimeException("Search error");
            }
        };

        JobLogService jobLogService = new JobLogService() {
            @Override