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

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