* Constructs a new FessActionValidator with the specified components.
     *
     * @param requestManager the request manager for handling HTTP requests
     * @param messagesCreator the creator for user messages
     * @param runtimeGroups the runtime validation groups
     */
    public FessActionValidator(final RequestManager requestManager, final UserMessagesCreator<MESSAGES> messagesCreator,
            final Class<?>[] runtimeGroups) {

        return false;
    }

    @Override
    public OptionalThing<TimeZone> findBusinessTimeZone(final ActionRuntime runtimeMeta, final RequestManager requestManager) {
        return OptionalObject.empty();
    }

    @Override
    public TimeZone getRequestedTimeZone(final RequestManager requestManager) { // not null
        return centralTimeZone; // you can change it if you like
    }

    @Override
    public String toString() {

import org.lastaflute.web.ruts.process.ActionRuntime;
import org.lastaflute.web.servlet.request.RequestManager;
import org.lastaflute.web.servlet.request.SimpleRequestManager;

public class FessUserTimeZoneProcessProviderTest extends UnitFessTestCase {

    private FessUserTimeZoneProcessProvider provider;
    private RequestManager requestManager;

    @Override
    protected void setUp(TestInfo testInfo) throws Exception {

    public OptionalThing<Locale> findBusinessLocale(final ActionRuntime runtimeMeta, final RequestManager requestManager) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String name = fessConfig.getQueryBrowserLangParameterName();
        if (StringUtil.isNotBlank(name)) {
            try {
                return requestManager.getParameter(name).filter(StringUtil::isNotBlank).map(LocaleUtils::toLocale);

        try {
            FessActionValidator.class.getConstructor(RequestManager.class, UserMessagesCreator.class, Class[].class);
            assertTrue("Constructor with required parameters exists", true);
        } catch (final NoSuchMethodException e) {
            fail("Constructor with RequestManager, UserMessagesCreator, and Class[] parameters should exist");
        }
    }

    @Test