assertNotNull(result);
        assertTrue(result.contains("title=Empty Map Test"));
        assertTrue(result.contains("queryMap={}"));
    }

    // Test edge cases
    @Test
    public void test_addQuery_withNullValues() {
        facetQueryView.addQuery(null, "query1");
        assertEquals("query1", facetQueryView.getQueryMap().get(null));

        facetQueryView.addQuery("key1", null);