content: /*
   * Copyright 1999-2021 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.nacos.api.naming.listener;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Collections;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class NamingEventTest {
      
      private MockNamingEventListener eventListener;
      
      @BeforeEach
      void setUp() throws Exception {
          eventListener = new MockNamingEventListener();
      }
      
      @Test
      void testNamingEventWithSimpleConstructor() {
          NamingEvent event = new NamingEvent("serviceName", Collections.EMPTY_LIST);
          assertEquals("serviceName", event.getServiceName());
          assertNull(event.getGroupName());
          assertNull(event.getClusters());
          assertTrue(event.getInstances().isEmpty());
          eventListener.onEvent(event);
          assertNull(event.getServiceName());
          assertNull(event.getGroupName());
          assertNull(event.getClusters());
          assertNull(event.getInstances());
      }
      
      @Test
      void testNamingEventWithFullConstructor() {
          NamingEvent event = new NamingEvent("serviceName", "group", "clusters", Collections.EMPTY_LIST);
          assertEquals("serviceName", event.getServiceName());
          assertEquals("group", event.getGroupName());
          assertEquals("clusters", event.getClusters());
          assertTrue(event.getInstances().isEmpty());
          eventListener.onEvent(event);
          assertNull(event.getServiceName());
          assertNull(event.getGroupName());
          assertNull(event.getClusters());
          assertNull(event.getInstances());
      }
      
      private static class MockNamingEventListener extends AbstractEventListener {
          
          @Override
          public void onEvent(Event event) {
              assertNull(getExecutor());
              NamingEvent namingEvent = (NamingEvent) event;
              namingEvent.setServiceName(null);
              namingEvent.setGroupName(null);
              namingEvent.setClusters(null);
              namingEvent.setInstances(null);
          }
      }
  }