assertNull(info.size);
        assertNull(info.minDocCount);
        assertNull(info.sort);
        assertNull(info.missing);
    }

    // Test init method with various configurations
    public void test_init_withAllFields() {
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getQueryFacetFields() {
                return "field1, field2, field3";
            }