final SetOnce<Map<String, Object>> initParamMapSet = new SetOnce<>();
        WebConfig webConfig = new WebConfig();
        final String userAgent = "TestAgent";
        webConfig.setUserAgent(userAgent);
        webConfig.setConfigParameter("""
                client.robotsTxtEnabled=false
                """);

        assertEquals("Mozilla/5.0 (compatible; Fess/98.76; +http://fess.codelibs.org/bot.html)", fessConfig.getUserAgentName());

        systemPropMap.put(Constants.CRAWLING_USER_AGENT_PROPERTY, "TestAgent");
        assertEquals("TestAgent", fessConfig.getUserAgentName());
    }

    private void assertArrays(final String[] expected, final String[] actual) {
        Arrays.sort(expected);
        Arrays.sort(actual);