options.webConfigIds = null;

        List<String> result = options.getWebConfigIdList();
        assertNull(result);
    }

    public void test_Options_getWebConfigIdList_withEmpty() {
        Crawler.Options options = new Crawler.Options();
        options.webConfigIds = "";

        List<String> result = options.getWebConfigIdList();
        assertNull(result);
    }

        /**
         * Parses the web configuration IDs string into a list.
         *
         * @return list of web configuration IDs, or null if none specified
         */
        protected List<String> getWebConfigIdList() {
            if (StringUtil.isNotBlank(webConfigIds)) {
                final String[] values = webConfigIds.split(",");
                return createConfigIdList(values);
            }
            return null;