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.clients.consumer;
  
  import org.apache.kafka.common.requests.JoinGroupRequest;
  
  import org.junit.jupiter.api.Test;
  
  import java.util.Optional;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class ConsumerGroupMetadataTest {
  
      private final String groupId = "group";
  
      @Test
      public void testAssignmentConstructor() {
          String memberId = "member";
          int generationId = 2;
          String groupInstanceId = "instance";
  
          ConsumerGroupMetadata groupMetadata = new ConsumerGroupMetadata(groupId,
              generationId, memberId, Optional.of(groupInstanceId));
  
          assertEquals(groupId, groupMetadata.groupId());
          assertEquals(generationId, groupMetadata.generationId());
          assertEquals(memberId, groupMetadata.memberId());
          assertTrue(groupMetadata.groupInstanceId().isPresent());
          assertEquals(groupInstanceId, groupMetadata.groupInstanceId().get());
      }
  
      @Test
      public void testGroupIdConstructor() {
          ConsumerGroupMetadata groupMetadata = new ConsumerGroupMetadata(groupId);
  
          assertEquals(groupId, groupMetadata.groupId());
          assertEquals(JoinGroupRequest.UNKNOWN_GENERATION_ID, groupMetadata.generationId());
          assertEquals(JoinGroupRequest.UNKNOWN_MEMBER_ID, groupMetadata.memberId());
          assertFalse(groupMetadata.groupInstanceId().isPresent());
      }
  
      @Test
      public void testInvalidGroupId() {
          String memberId = "member";
          int generationId = 2;
  
          assertThrows(NullPointerException.class, () -> new ConsumerGroupMetadata(
              null, generationId, memberId, Optional.empty())
          );
      }
  
      @Test
      public void testInvalidMemberId() {
          int generationId = 2;
  
          assertThrows(NullPointerException.class, () -> new ConsumerGroupMetadata(
              groupId, generationId, null, Optional.empty())
          );
      }
  
      @Test
      public void testInvalidInstanceId() {
          String memberId = "member";
          int generationId = 2;
  
          assertThrows(NullPointerException.class, () -> new ConsumerGroupMetadata(
              groupId, generationId, memberId, null)
          );
      }
  }
  