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.kafka.server.share;
  
  import org.apache.kafka.common.Uuid;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  
  public class CachedSharePartitionTest {
  
      @Test
      public void testCachedSharePartitionEqualsAndHashCode() {
          Uuid topicId = Uuid.randomUuid();
          String topicName = "topic";
          int partition = 0;
  
          CachedSharePartition cachedSharePartitionWithIdAndName = new
                  CachedSharePartition(topicName, topicId, partition, false);
          CachedSharePartition cachedSharePartitionWithIdAndNoName = new
                  CachedSharePartition(null, topicId, partition, false);
          CachedSharePartition cachedSharePartitionWithDifferentIdAndName = new
                  CachedSharePartition(topicName, Uuid.randomUuid(), partition, false);
          CachedSharePartition cachedSharePartitionWithZeroIdAndName = new
                  CachedSharePartition(topicName, Uuid.ZERO_UUID, partition, false);
  
          // CachedSharePartitions with valid topic IDs will compare topic ID and partition but not topic name.
          assertEquals(cachedSharePartitionWithIdAndName, cachedSharePartitionWithIdAndNoName);
          assertEquals(cachedSharePartitionWithIdAndName.hashCode(), cachedSharePartitionWithIdAndNoName.hashCode());
  
          assertNotEquals(cachedSharePartitionWithIdAndName, cachedSharePartitionWithDifferentIdAndName);
          assertNotEquals(cachedSharePartitionWithIdAndName.hashCode(), cachedSharePartitionWithDifferentIdAndName.hashCode());
  
          assertNotEquals(cachedSharePartitionWithIdAndName, cachedSharePartitionWithZeroIdAndName);
          assertNotEquals(cachedSharePartitionWithIdAndName.hashCode(), cachedSharePartitionWithZeroIdAndName.hashCode());
  
          // CachedSharePartitions with null name and valid IDs will act just like ones with valid names
  
          assertNotEquals(cachedSharePartitionWithIdAndNoName, cachedSharePartitionWithDifferentIdAndName);
          assertNotEquals(cachedSharePartitionWithIdAndNoName.hashCode(), cachedSharePartitionWithDifferentIdAndName.hashCode());
  
          assertNotEquals(cachedSharePartitionWithIdAndNoName, cachedSharePartitionWithZeroIdAndName);
          assertNotEquals(cachedSharePartitionWithIdAndNoName.hashCode(), cachedSharePartitionWithZeroIdAndName.hashCode());
  
          assertEquals(cachedSharePartitionWithZeroIdAndName.hashCode(), cachedSharePartitionWithZeroIdAndName.hashCode());
      }
  }
  