content: /*
   * Copyright 1999-2020 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.naming.core.v2.event.publisher;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.common.notify.listener.SmartSubscriber;
  import com.alibaba.nacos.common.notify.listener.Subscriber;
  import com.alibaba.nacos.common.utils.ThreadUtils;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.mockito.Mockito.atLeastOnce;
  import static org.mockito.Mockito.never;
  import static org.mockito.Mockito.verify;
  
  @ExtendWith(MockitoExtension.class)
  class NamingEventPublisherTest {
      
      @Mock
      private Subscriber subscriber;
      
      @Mock
      private SmartSubscriber smartSubscriber;
      
      private NamingEventPublisher namingEventPublisher;
      
      @BeforeEach
      void setUp() throws Exception {
          namingEventPublisher = new NamingEventPublisher();
          namingEventPublisher.init(TestEvent.class, Byte.SIZE);
      }
      
      @AfterEach
      void tearDown() throws Exception {
          namingEventPublisher.shutdown();
      }
      
      @Test
      void testAddSubscriber() {
          namingEventPublisher.addSubscriber(subscriber, TestEvent.TestEvent1.class);
          namingEventPublisher.addSubscriber(smartSubscriber, TestEvent.TestEvent2.class);
          TestEvent.TestEvent1 testEvent1 = new TestEvent.TestEvent1();
          TestEvent.TestEvent2 testEvent2 = new TestEvent.TestEvent2();
          namingEventPublisher.publish(testEvent1);
          namingEventPublisher.publish(testEvent2);
          ThreadUtils.sleep(2000L);
          verify(subscriber).onEvent(testEvent1);
          verify(smartSubscriber).onEvent(testEvent2);
      }
      
      @Test
      void testRemoveSubscriber() {
          namingEventPublisher.addSubscriber(subscriber, TestEvent.TestEvent1.class);
          namingEventPublisher.addSubscriber(smartSubscriber, TestEvent.TestEvent1.class);
          TestEvent.TestEvent1 testEvent1 = new TestEvent.TestEvent1();
          namingEventPublisher.publish(testEvent1);
          ThreadUtils.sleep(2000L);
          verify(subscriber).onEvent(testEvent1);
          verify(smartSubscriber).onEvent(testEvent1);
          namingEventPublisher.removeSubscriber(smartSubscriber, TestEvent.TestEvent1.class);
          testEvent1 = new TestEvent.TestEvent1();
          namingEventPublisher.publish(testEvent1);
          ThreadUtils.sleep(500L);
          verify(subscriber).onEvent(testEvent1);
          verify(smartSubscriber, never()).onEvent(testEvent1);
      }
      
      @Test
      void testPublishOverFlow() {
          TestEvent testEvent = new TestEvent();
          for (int i = 0; i < Byte.SIZE; i++) {
              namingEventPublisher.publish(testEvent);
          }
          namingEventPublisher.addSubscriber(subscriber, TestEvent.class);
          namingEventPublisher.publish(testEvent);
          verify(subscriber, atLeastOnce()).onEvent(testEvent);
      }
      
      @Test
      void getStatus() throws NacosException {
          namingEventPublisher.publish(new TestEvent());
          namingEventPublisher.publish(new TestEvent.TestEvent1());
          namingEventPublisher.publish(new TestEvent.TestEvent2());
          String expectedStatus = "Publisher TestEvent                     : shutdown=false, queue=      3/8      ";
          assertThat(namingEventPublisher.getStatus(), is(expectedStatus));
          namingEventPublisher.addSubscriber(subscriber, TestEvent.TestEvent1.class);
          ThreadUtils.sleep(2000L);
          expectedStatus = "Publisher TestEvent                     : shutdown=false, queue=      0/8      ";
          assertThat(namingEventPublisher.getStatus(), is(expectedStatus));
          namingEventPublisher.shutdown();
          expectedStatus = "Publisher TestEvent                     : shutdown= true, queue=      0/8      ";
          assertThat(namingEventPublisher.getStatus(), is(expectedStatus));
      }
      
  }
  