}

    public void test_isValidUserCode() {
        FessProp.propMap.clear();
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public Integer getUserCodeMinLengthAsInteger() {
                return 10;
            }

            @Override
            public Integer getUserCodeMaxLengthAsInteger() {
                return 20;
            }

    String getUserCodePattern();

    Integer getUserCodeMinLengthAsInteger();

    Integer getUserCodeMaxLengthAsInteger();

    default boolean isValidUserCode(final String userCode) {
        if (userCode == null) {
            return false;
        }

        final int length = userCode.length();