callback.store(new DataStoreParams(), null);
        assertEquals(-1L, callback.getDocumentSize());
    }

    @Test
    public void test_store_with_empty_map() {
        // Test with empty data map
        final AtomicInteger storeCount = new AtomicInteger(0);
        IndexUpdateCallback callback = new IndexUpdateCallback() {
            @Override

    }

    // Test reload with InputStream
    @Test
    public void test_reload_withComments() {
        String content = "# This is a comment\n" + "word1\n" + "\n" + // empty line
                "word2\n" + "# Another comment\n" + "word3\n";

        InputStream is = new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
        stopwordsFile.reload(null, is);

                    if (StringUtil.isBlank(responseData.getUrl())) {
                        throw new ThumbnailGenerationException(
                                "Failed to process a thumbnail content: " + url + " (Response URL is empty)");
                    }
                    return consumer.test(responseData);
                } catch (final CrawlingAccessException e) {
                    if (logger.isDebugEnabled()) {

        doc.put("content", "コンテンツ");

        languageHelper.updateDocument(doc);

        assertEquals("ja", doc.get("lang"));
        // No fields should be added since langFields is empty
        assertNull(doc.get("title_ja"));
        assertNull(doc.get("content_ja"));
    }

    @Test
    public void test_createScript_noLangFields() {
        languageHelper.langFields = new String[] {};

            }
        };

        FessTimeResourceProvider nullAdjustProvider = new FessTimeResourceProvider(nullAdjustConfig);
        assertNotNull(nullAdjustProvider);
    }

    // Test with config returning empty string
    @Test
    public void test_emptyStringTimeAdjustment() {
        FessConfig emptyConfig = new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override

        // Note: Notification sending is tested but we don't verify the mock since it uses complex callback mechanism
    }

    // Test state change with empty notification addresses
    @Test
    public void test_execute_stateChangeEmptyNotificationAddresses() {
        // Setup mock components
        SearchEngineClient searchEngineClient = new SearchEngineClient() {

     *
     * @param value The number to convert
     * @return String representation of the number, or empty string if null
     */
    private String toNumberString(final Number value) {
        return value != null ? value.toString() : StringUtil.EMPTY;
    }

    /**
     * Deletes a search log entry based on its type.
     *

        assertEquals(30, searchLogDeletedDays[0]);
        assertEquals(14, jobLogDeletedDays[0]);
        assertEquals(7, userInfoDeletedDays[0]);

        // Assert result is empty when all succeed
        assertEquals("", result);
    }

    // Test with negative days to skip purging
    @Test
    public void test_execute_negativeDays() {
        // Setup tracking variables

        state.currentPhase = null;
        state.completedPhases = [];
    }

    /**
     * Hide empty state
     */
    function hideEmptyState() {
        elements.emptyState.hide();
    }

    /**
     * Show empty state
     */
    function showEmptyState() {
        elements.emptyState.show();
    }

    /**
     * Format timestamp
     */

                } catch (final IOException e) {
                    throw new IORuntimeException(e);
                }
                return true;
            }, OptionalThing.empty());
            response.flushBuffer();
            if (logger.isDebugEnabled()) {
                logger.debug("Loaded {} documents", count);
            }