options.webConfigIds = null;

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

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

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