assertNull(result);

        updater.close();
    }

    @Test
    public void test_updater_writeLine() {
        StopwordsFile.StopwordsUpdater updater = stopwordsFile.new StopwordsUpdater(null);

        // Test writing a comment line
        updater.write("# This is a comment");

        updater.close();
    }

    // Test edge cases
    @Test

{"name":"Score Updater","target":"all","cronExpression":"0 * * * *","scriptType":"groovy","scriptData":"return container.getComponent(\"scoreUpdater\").execute();","jobLogging":false,"crawler":false,"available":true,"sortOrder":10,"createdBy":"system","createdTime":0,"updatedBy":"system","updatedTime":0}
{"index":{"_index":"fess_config.scheduled_job","_id":"label_updater"}}

        testFactory.lastLoadedTime = System.currentTimeMillis() - 70000L;

        // One thread updates
        Thread updater = new Thread(() -> {
            testFactory.getDataStoreNames();
        });

        updater.start();
        updater.join();

        // Multiple threads read the lastLoadedTime
        for (int i = 0; i < 10; i++) {
            final int index = i;

     * @return The file type helper.
     */
    public static FileTypeHelper getFileTypeHelper() {
        return getComponent(FILE_TYPE_HELPER);
    }

    /**
     * Gets the index updater component.
     * @return The index updater.
     */
    public static IndexUpdater getIndexUpdater() {
        return getComponent(INDEX_UPDATER);
    }

    /**
     * Gets the key match helper component.