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.bifromq.mqtt.handler.v5;
  
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertTrue;
  
  import org.testng.annotations.Test;
  
  public class ReceiverTopicAliasManagerTest {
      @Test
      public void case1() {
          ReceiverTopicAliasManager topicAliasMap = new ReceiverTopicAliasManager();
          topicAliasMap.setAlias("topic1", 1);
  
          assertTrue(topicAliasMap.getAlias("topic1").isPresent());
          assertEquals(topicAliasMap.getAlias("topic1").get(), 1);
  
          assertTrue(topicAliasMap.getTopic(1).isPresent());
          assertEquals(topicAliasMap.getTopic(1).get(), "topic1");
      }
  
      @Test
      public void cass2() {
          ReceiverTopicAliasManager topicAliasMap = new ReceiverTopicAliasManager();
          topicAliasMap.setAlias("topic1", 1);
          topicAliasMap.setAlias("topic2", 1);
  
          assertTrue(topicAliasMap.getTopic(1).isPresent());
          assertEquals(topicAliasMap.getTopic(1).get(), "topic2");
  
          assertTrue(topicAliasMap.getAlias("topic1").isEmpty());
      }
  
      @Test
      public void case3() {
          ReceiverTopicAliasManager topicAliasMap = new ReceiverTopicAliasManager();
          topicAliasMap.setAlias("topic1", 1);
          topicAliasMap.setAlias("topic1", 2);
  
          assertTrue(topicAliasMap.getAlias("topic1").isPresent());
          assertEquals(topicAliasMap.getAlias("topic1").get(), 2);
  
          assertTrue(topicAliasMap.getTopic(2).isPresent());
          assertEquals(topicAliasMap.getTopic(2).get(), "topic1");
      }
  }
  