assertTrue(keywords.isEmpty());
    }

    // Test addHighlightedQuery with null highlightedQuerySet
    @Test
    public void test_addHighlightedQuery_nullSet() {
        queryContext = new QueryContext("test", false);
        queryContext.addHighlightedQuery("text");
        // Should not throw exception
    }

    // Test addHighlightedQuery with valid set
    @Test

        }
        return Collections.emptyList();
    }

    /**
     * Adds a query term to the highlighted query set.
     * @param text The query text to highlight.
     */
    public void addHighlightedQuery(final String text) {
        if (highlightedQuerySet != null) {
            highlightedQuerySet.add(text);
        }
    }

    /**
     * Gets the processed query string.

        // Manual implementation (for comparison)
        QueryBuilder result2;
        context2.addFieldLog("title", "test");
        context2.addHighlightedQuery("test");
        if (Constants.DEFAULT_FIELD.equals("title")) {
            result2 = queryCommand.buildDefaultQueryBuilder(fessConfig, context2,

            final float boost, final String field, final String text) {
        context.addFieldLog(field, text);
        context.addHighlightedQuery(text);
        return buildMatchPhraseQuery(field, text).boost(boost);
    }

    /**
     * Converts a term query to a keyword-based exact term query.
     *

        final String text = prefixQuery.getPrefix().text();

        if (Constants.DEFAULT_FIELD.equals(field)) {
            context.addFieldLog(field, text + "*");
            context.addHighlightedQuery(text);
            return buildDefaultQueryBuilder(fessConfig, context,
                    (f, b) -> QueryBuilders.matchPhrasePrefixQuery(f, toLowercaseWildcard(text))
                            .boost(b * boost)

            context.addFieldLog(field, text);
            final String highlightText = StringUtils.strip(text, "*");
            if (StringUtil.isNotBlank(highlightText)) {
                context.addHighlightedQuery(highlightText);
            }
            return buildDefaultQueryBuilder(fessConfig, context,
                    (f, b) -> QueryBuilders.wildcardQuery(f, toLowercaseWildcard(text)).boost(b * boost));
        }

        if (Constants.DEFAULT_FIELD.equals(field)) {
            final String text = term.text();
            context.addFieldLog(field, text);
            context.addHighlightedQuery(text);
            return buildDefaultQueryBuilder(fessConfig, context,
                    (f, b) -> QueryBuilders.fuzzyQuery(f, text)
                            .fuzziness(Fuzziness.fromEdits(fuzzyQuery.getMaxEdits()))

            queryBuf.append(termRangeQuery.includesUpper() ? ']' : '}');
            final String origQuery = queryBuf.toString();
            context.addFieldLog(Constants.DEFAULT_FIELD, origQuery);
            context.addHighlightedQuery(origQuery);
            return buildDefaultQueryBuilder(fessConfig, context, (f, b) -> QueryBuilders.matchPhraseQuery(f, origQuery).boost(b));
        }

        context.addFieldLog(field, termRangeQuery.toString(field));

            stream(texts).of(stream -> stream.forEach(t -> context.addHighlightedQuery(t)));
            return buildDefaultQueryBuilder(fessConfig, context, (f, b) -> buildMatchPhraseQuery(f, text).boost(b * boost));
        }

        if (isSearchField(field)) {
            context.addFieldLog(field, text);
            stream(texts).of(stream -> stream.forEach(t -> context.addHighlightedQuery(t)));
            return buildMatchPhraseQuery(field, text);

            final String text, final float boost, final DefaultQueryBuilderFunction defaultBuilder, final FieldQueryBuilder fieldBuilder) {

        context.addFieldLog(field, text);
        context.addHighlightedQuery(text);

        if (Constants.DEFAULT_FIELD.equals(field)) {
            return buildDefaultQueryBuilder(fessConfig, context, defaultBuilder);
        }

        if (isSearchField(field)) {