// Setup FessConfig with proper initialization
        setupBaseFessConfig();

        // Initialize QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig();
        queryFieldConfig.init();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Initialize QueryParser
        QueryParser queryParser = new QueryParser();
        queryParser.init();

    private PrefixQueryCommand queryCommand;
    private QueryFieldConfig queryFieldConfig;

    @Override
    protected void setUpChild() throws Exception {
        // Get the queryProcessor and queryFieldConfig that were registered in parent class
        queryProcessor = ComponentUtil.getComponent("queryProcessor");
        queryFieldConfig = ComponentUtil.getComponent("queryFieldConfig");

        // Initialize and register PrefixQueryCommand

        assertTrue(queryFieldConfig.isSortField("score"));
        assertTrue(queryFieldConfig.isSortField("created"));
        assertTrue(queryFieldConfig.isSortField("modified"));
        assertTrue(queryFieldConfig.isSortField("title"));

        // Test invalid sort fields
        assertFalse(queryFieldConfig.isSortField("invalid"));
        assertFalse(queryFieldConfig.isSortField(""));
        assertFalse(queryFieldConfig.isSortField(null));

    public void test_getResponseFields() {
        // Setup mock QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig() {
            @Override
            public String[] getResponseFields() {
                return new String[] { "field1", "field2", "field3" };
            }
        };
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Verify array is set
        assertNotNull(queryFieldConfig.facetFields);
        assertSame(fields, queryFieldConfig.facetFields);
        assertEquals(3, queryFieldConfig.facetFields.length);

        // Verify Set is created and populated
        assertNotNull(queryFieldConfig.facetFieldSet);
        assertEquals(3, queryFieldConfig.facetFieldSet.size());

        super.setUp(testInfo);

        // Setup FessConfig
        setupMockFessConfig();

        // Initialize QueryFieldConfig
        QueryFieldConfig queryFieldConfig = new QueryFieldConfig();
        queryFieldConfig.init();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");

        // Initialize QueryParser
        QueryParser queryParser = new QueryParser();
        queryParser.init();

    private QueryFieldConfig queryFieldConfig;

    @Override
    protected void setUpChild() throws Exception {
        queryCommand = new TestQueryCommand();
        queryFieldConfig = ComponentUtil.getQueryFieldConfig();

        // Set up search fields
        String[] searchFields = { "title", "content", "url", "host", "filetype" };
        queryFieldConfig.setSearchFields(searchFields);
    }

        inject(keyMatchHelper);
        inject(roleQueryHelper);
        inject(permissionHelper);
        inject(queryHelper);
        queryFieldConfig = new QueryFieldConfig();
        ComponentUtil.register(queryFieldConfig, "queryFieldConfig");
        queryFieldConfig.init();
        QueryProcessor queryProcessor = new QueryProcessor();
        ComponentUtil.register(queryProcessor, "queryProcessor");

            }

            // rescorer
            buildRescorer(queryHelper, queryFieldConfig, fessConfig);

            // sort
            buildSort(queryContext, queryFieldConfig, fessConfig);

            // highlighting
            if (highlightInfo != null) {
                buildHighlighter(queryHelper, queryFieldConfig, fessConfig);
            }

            // facets

    /** Helper for query processing and transformation. */
    @Resource
    protected QueryHelper queryHelper;

    /** Configuration for query field mappings and processing. */
    @Resource
    protected QueryFieldConfig queryFieldConfig;

    /** Helper for role-based query filtering and security. */
    @Resource
    protected RoleQueryHelper roleQueryHelper;

    /** Helper for managing user information and authentication. */