assertEquals(Locale.GERMANY, result1.get());
        assertEquals(Locale.GERMANY, result2.get());
        assertEquals(Locale.GERMANY, result3.get());
    }

    // Helper method to create mock RequestManager
    private RequestManager createMockRequestManager(final String paramValue) {
        return new org.lastaflute.web.servlet.request.SimpleRequestManager() {
            @Override

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
    public void setUp() throws Exception {
        super.setUp();

        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");
        }
    }

    public void process(final HttpServletRequest request, final HttpServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final RequestManager requestManager = ComponentUtil.getRequestManager();
        if (!requestManager.findUserBean(FessUserBean.class).map(user -> user.hasRoles(acceptedRoles)).orElse(Boolean.FALSE)) {

    /**
     * Creates a new action validator.
     *
     * @param requestManager  The request manager.
     * @param messagesCreator The messages creator.
     * @param runtimeGroups   The runtime groups.
     * @return A new action validator.
     */
    public ActionValidator<FessMessages> createValidator(final RequestManager requestManager,