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.common.requests;
  
  import org.apache.kafka.common.errors.UnsupportedVersionException;
  import org.apache.kafka.common.message.LeaveGroupRequestData;
  import org.apache.kafka.common.message.LeaveGroupRequestData.MemberIdentity;
  import org.apache.kafka.common.message.LeaveGroupResponseData;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.protocol.Errors;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  public class LeaveGroupRequestTest {
  
      private final String groupId = "group_id";
      private final String memberIdOne = "member_1";
  
      private final int throttleTimeMs = 10;
  
      private LeaveGroupRequest.Builder builder;
      private List<MemberIdentity> members;
  
      @BeforeEach
      public void setUp() {
          members = Arrays.asList(new MemberIdentity()
                                           .setMemberId(memberIdOne)
                                           .setGroupInstanceId("instance_1"),
                                  new MemberIdentity()
                                           .setMemberId("member_2")
                                           .setGroupInstanceId("instance_2"));
          builder = new LeaveGroupRequest.Builder(
              groupId,
              members
          );
      }
  
      @Test
      public void testMultiLeaveConstructor() {
          final LeaveGroupRequestData expectedData = new LeaveGroupRequestData()
                                                         .setGroupId(groupId)
                                                         .setMembers(members);
  
          for (short version : ApiKeys.LEAVE_GROUP.allVersions()) {
              try {
                  LeaveGroupRequest request = builder.build(version);
                  if (version <= 2) {
                      fail("Older version " + version +
                               " request data should not be created due to non-single members");
                  }
                  assertEquals(expectedData, request.data());
                  assertEquals(members, request.members());
  
                  LeaveGroupResponse expectedResponse = new LeaveGroupResponse(
                      Collections.emptyList(),
                      Errors.COORDINATOR_LOAD_IN_PROGRESS,
                      throttleTimeMs,
                      version
                  );
  
                  assertEquals(expectedResponse, request.getErrorResponse(throttleTimeMs,
                                                                          Errors.COORDINATOR_LOAD_IN_PROGRESS.exception()));
              } catch (UnsupportedVersionException e) {
                  assertTrue(e.getMessage().contains("leave group request only supports single member instance"));
              }
          }
  
      }
  
      @Test
      public void testSingleLeaveConstructor() {
          final LeaveGroupRequestData expectedData = new LeaveGroupRequestData()
                                                         .setGroupId(groupId)
                                                         .setMemberId(memberIdOne);
          List<MemberIdentity> singleMember = Collections.singletonList(
              new MemberIdentity()
                  .setMemberId(memberIdOne));
  
          builder = new LeaveGroupRequest.Builder(groupId, singleMember);
  
          for (short version = 0; version <= 2; version++) {
              LeaveGroupRequest request = builder.build(version);
              assertEquals(expectedData, request.data());
              assertEquals(singleMember, request.members());
  
              int expectedThrottleTime = version >= 1 ? throttleTimeMs
                                             : AbstractResponse.DEFAULT_THROTTLE_TIME;
              LeaveGroupResponse expectedResponse = new LeaveGroupResponse(
                  new LeaveGroupResponseData()
                      .setErrorCode(Errors.NOT_CONTROLLER.code())
                      .setThrottleTimeMs(expectedThrottleTime)
              );
  
              assertEquals(expectedResponse, request.getErrorResponse(throttleTimeMs,
                                                                      Errors.NOT_CONTROLLER.exception()));
          }
      }
  
      @Test
      public void testBuildEmptyMembers() {
          assertThrows(IllegalArgumentException.class,
              () -> new LeaveGroupRequest.Builder(groupId, Collections.emptyList()));
      }
  }
  