Map.of("_default", List.of("QUERY1 QUERY2")), //
                Set.of("QUERY1", "QUERY2"), //
                buildQuery("\"QUERY1 QUERY2\""));
        assertQueryContext(buildQuery("\"QUERY1 QUERY2\"").getQueryBuilder().toString().replaceAll("\\s", ""),
                buildQuery("aaa:\"QUERY1 QUERY2\""));

        assertQueryContext(

 * 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.

    }

    /**
     * Builds the query for suggestions.
     * @param q The query string.
     * @param fields The fields to search in.
     * @return The QueryBuilder instance.
     */
    public QueryBuilder buildQuery(final String q, final List<String> fields) {
        try {
            final QueryBuilder queryBuilder;
            if (Strings.isNullOrEmpty(q)) {
                queryBuilder = QueryBuilders.matchAllQuery();

        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