* These tests focus on the buildQuery, buildFilterQuery, and buildFunctionScoreQuery methods.
 */
public class SuggestRequestQueryBuildingTest {

    private TestableSuggestRequest request;

    @Before
    public void setUp() {
        request = new TestableSuggestRequest();
    }

    // ============================================================
    // Tests for buildQuery method

     * @return The QueryBuilder instance.
     * @deprecated Use {@link SuggestQueryBuilder#buildQuery(String, List)} instead.
     */
    @Deprecated
    protected QueryBuilder buildQuery(final String q, final List<String> fieldList) {
        return new SuggestQueryBuilder(readingConverter, normalizer, languages, prefixMatchWeight).buildQuery(q, fieldList);
    }

    /**
     * Builds a filter query.

         * @param field The field name.
         * @param text The query text.
         * @param boost The boost value.
         * @return The created query builder.
         */
        QueryBuilder buildQuery(String field, String text, float boost);
    }

    /**
     * Template method that handles the common pattern of query conversion:
     * 1. Check if field is DEFAULT_FIELD and apply default query builder

     * Builds a query for boosting documents based on the keyword list.
     *
     * @param keywordList The list of keywords.
     * @param list The list of filter function builders to add to.
     */
    public void buildQuery(final List<String> keywordList, final List<FilterFunctionBuilder> list) {
        final String key = ComponentUtil.getVirtualHostHelper().getVirtualHostKey();
        keywordList.stream().forEach(keyword -> {

            return bigArrays;
        }

        @Override
        public IndexSearcher searcher() {
            return null;
        }

        @Override
        public Query buildQuery(QueryBuilder builder) throws IOException {
            throw new UnsupportedOperationException();
        }

        @Override
        public Query filterQuery(Query query) {

            list.add(new FilterFunctionBuilder(
                    ScoreFunctionBuilders.fieldValueFactorFunction(ComponentUtil.getFessConfig().getIndexFieldBoost())));
            ComponentUtil.getKeyMatchHelper().buildQuery(queryContext.getDefaultKeyword(), list);
            list.addAll(boostFunctionList);
        });
    }

    /**
     * Builds the base query from the user's search string using the configured query parser.

        try {
            List<String> keywordList = Collections.emptyList();
            List<FilterFunctionBuilder> functionBuilders = new ArrayList<>();

            try {
                keyMatchHelper.buildQuery(keywordList, functionBuilders);
            } catch (Exception e) {
                // Expected due to missing dependencies in test environment
                assertTrue(true);
                return;
            }

    public void test_fieldQueryBuilder_interface() {
        QueryCommand.FieldQueryBuilder builder = (field, text, boost) -> QueryBuilders.termQuery(field, text).boost(boost);

        QueryBuilder result = builder.buildQuery("title", "test", 2.0f);
        assertNotNull(result);
    }

    /**
     * Test DefaultQueryBuilderFunction functional interface.
     */
    @Test