}

    @Test
    public void test_buildGoUrl_nullQueryId() {
        assertNull(chatClient.testBuildGoUrl("", "doc123", null, 1710000000L, 0));
    }

    @Test
    public void test_buildGoUrl_encodesSpecialCharacters() {
        final String url = chatClient.testBuildGoUrl("", "doc&id=1", "query id#2", 1710000000L, 0);
        assertTrue(url.contains("docId=doc%26id%3D1"));