content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *        http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   */
  package org.apache.causeway.testdomain.eventhandling;
  
  import jakarta.inject.Inject;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.context.event.EventListener;
  import org.springframework.stereotype.Service;
  
  import org.apache.causeway.applib.services.eventbus.EventBusService;
  import org.apache.causeway.core.runtimeservices.eventbus.EventBusServiceSpring;
  
  import lombok.Getter;
  
  @SpringBootTest(
          classes = {
                  GenericEventPublishingTest.TestConfig.class,
                  GenericEventPublishingTest.TestPublisher.class,
                  GenericEventPublishingTest.TestListener.class,
                  EventBusServiceSpring.class
          })
  class GenericEventPublishingTest {
  
      @Inject private TestPublisher testPublisher;
      @Inject private TestListener testListener;
  
      @Test
      void firedEventShouldBeReceivedImmediately() {
  
          var history = testListener.getHistory();
  
          testPublisher.fireHelloWorld();
  
          assertEquals("Hello World!", history.toString());
      }
  
      // -- HELPER
  
      @Configuration
      static class TestConfig {
          // no specific config required
      }
  
      @Service
      public static class TestPublisher {
  
          @Inject EventBusService eventBusService;
  
          public void fireHelloWorld() {
              eventBusService.post(new GenericEvent<>("Hello World!"));
          }
  
      }
  
      @Service
      public static class TestListener {
  
          @Getter
          private final StringBuilder history = new StringBuilder();
  
          @EventListener(GenericEvent.class)
          public void receiveHelloWorld(final GenericEvent<String> event) {
              history.append(event.what());
          }
  
      }
  
      record GenericEvent<T>(T what) {
      }
  
  }
  