assertTrue("Field " + field + " should be found", queryFieldConfig.isSortField(field));
        }

        // Test negative cases
        assertFalse(queryFieldConfig.isSortField("nonexistent"));
        assertFalse(queryFieldConfig.isSortField("title"));
        assertFalse(queryFieldConfig.isSortField(""));
        assertFalse(queryFieldConfig.isSortField(null));
    }

    /**

                        "Invalid sort field: " + termQuery);
            }
            final String sortField = values[0];
            if (!getQueryFieldConfig().isSortField(sortField)) {
                throw new InvalidQueryException(
                        messages -> messages.addErrorsInvalidQueryUnsupportedSortField(UserMessages.GLOBAL_PROPERTY_KEY, sortField),

     * Uses O(1) Set lookup for improved performance.
     *
     * @param field the field name to check
     * @return true if the field can be used for sorting, false otherwise
     */
    protected boolean isSortField(final String field) {
        return sortFieldSet != null && sortFieldSet.contains(field);
    }

    /**
     * Checks if the specified field can be used for faceted search.

        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(""));