RequestManager mockRequestManager = createMockRequestManager("de_DE");

        // Execute multiple times
        OptionalThing<Locale> result1 = provider.findBusinessLocale(null, mockRequestManager);
        OptionalThing<Locale> result2 = provider.findBusinessLocale(null, mockRequestManager);
        OptionalThing<Locale> result3 = provider.findBusinessLocale(null, mockRequestManager);

        // Verify all return same result

    public void test_loginFailure() {
        activityHelper.useEcsFormat = false;
        activityHelper.loginFailure(OptionalThing.empty());
        assertEquals("action:LOGIN_FAILURE", localLogMsg.get());
    }

    public void test_logout() {
        activityHelper.useEcsFormat = false;
        activityHelper.logout(OptionalThing.empty());
        assertEquals("action:LOGOUT\tuser:-\tpermissions:-", localLogMsg.get());

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.DocumentUtil;
import org.codelibs.fess.util.FacetResponse;
import org.dbflute.optional.OptionalEntity;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.util.LaRequestUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.common.document.DocumentField;

        TestRankFusionSearcher testSearcher = new TestRankFusionSearcher();
        String query = "test query";
        SearchRequestParams params = createTestSearchRequestParams();
        OptionalThing<FessUserBean> userBean = OptionalThing.empty();

        SearchResult result = testSearcher.search(query, params, userBean);

        assertNotNull(result);
        assertEquals(query, testSearcher.lastQuery);

            }

            @Override
            protected OptionalThing<SMailSubjectFilter> createSubjectFilter() {
                return OptionalThing.of((view, subject) -> subject);
            }

            @Override
            protected OptionalThing<SMailAsyncStrategy> createAsyncStrategy() {

    /**
     * Returns an empty OptionalThing for login manager since API actions
     * use token-based authentication instead of traditional session-based login.
     *
     * @return empty OptionalThing indicating no login manager is used
     */
    @Override
    protected OptionalThing<LoginManager> myLoginManager() {
        return OptionalThing.empty();
    }

    /**

     * @return an OptionalThing containing the Config if the field exists and has a non-blank value,
     *         otherwise an empty OptionalThing
     */
    public OptionalThing<Config> getConfig(final String fieldName) {
        final String value = params.get(fieldName);
        if (StringUtil.isNotBlank(value)) {
            return OptionalThing.of(new Config(value));
        }

        }

        @Override
        public OptionalThing<String> getSavedSubject() {
            return OptionalThing.ofNullable(subject, () -> {
                throw new IllegalStateException("Subject not found");
            });
        }

        @Override
        public OptionalThing<String> getSavedPlainText() {
            return OptionalThing.ofNullable(plainText, () -> {

                logger.debug("Redirecting to SearchAction with parameters: {}", paramList);
            }
            return OptionalThing.of(redirectWith(SearchAction.class, new UrlChain(this).params(paramList.toArray(n -> new Object[n]))));
        }
        return OptionalThing.empty();
    }

    /**
     * SSO logout endpoint.
     *

    /**
     * Gets the login manager for this admin action.
     *
     * @return the login manager wrapped in OptionalThing
     */
    @Override
    protected OptionalThing<LoginManager> myLoginManager() {
        return OptionalThing.of(fessLoginAssist);
    }

    // ===================================================================================