assertNotNull(queryFieldConfig.notAnalyzedFieldSet);
        assertTrue(queryFieldConfig.notAnalyzedFieldSet.size() > 0);
    }

    @Test
    public void test_init_withExistingFields() {
        // Set existing fields before initialization
        String[] existingResponseFields = { "field1", "field2" };
        queryFieldConfig.setResponseFields(existingResponseFields);