assertEquals(3, result.size());
        assertTrue(result.contains("id1"));
        assertTrue(result.contains("id2"));
        assertTrue(result.contains("id3"));
    }

    public void test_Options_getWebConfigIdList_withNull() {
        Crawler.Options options = new Crawler.Options();
        options.webConfigIds = null;

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