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.record;
  
  import org.apache.kafka.common.message.KRaftVersionRecord;
  import org.apache.kafka.common.message.SnapshotFooterRecord;
  import org.apache.kafka.common.message.SnapshotHeaderRecord;
  import org.apache.kafka.common.message.VotersRecord;
  import org.apache.kafka.common.message.VotersRecord.Voter;
  import org.apache.kafka.common.protocol.ByteBufferAccessor;
  import org.apache.kafka.common.protocol.ObjectSerializationCache;
  
  import org.junit.jupiter.api.Test;
  
  import java.nio.ByteBuffer;
  import java.util.Collections;
  import java.util.List;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class ControlRecordUtilsTest {
  
      @Test
      public void testCurrentVersions() {
          // If any of these asserts fail, please make sure that Kafka supports reading and
          // writing the latest version for these records.
          assertEquals(
              (short) 0,
              ControlRecordUtils.LEADER_CHANGE_CURRENT_VERSION
          );
          assertEquals(
              SnapshotHeaderRecord.HIGHEST_SUPPORTED_VERSION,
              ControlRecordUtils.SNAPSHOT_HEADER_CURRENT_VERSION
          );
          assertEquals(
              SnapshotFooterRecord.HIGHEST_SUPPORTED_VERSION,
              ControlRecordUtils.SNAPSHOT_FOOTER_CURRENT_VERSION
          );
          assertEquals(
              KRaftVersionRecord.HIGHEST_SUPPORTED_VERSION,
              ControlRecordUtils.KRAFT_VERSION_CURRENT_VERSION
          );
          assertEquals(
              VotersRecord.HIGHEST_SUPPORTED_VERSION,
              ControlRecordUtils.KRAFT_VOTERS_CURRENT_VERSION
          );
      }
  
      @Test
      public void testInvalidControlRecordType() {
          IllegalArgumentException thrown = assertThrows(
              IllegalArgumentException.class,
              () -> testDeserializeRecord(ControlRecordType.COMMIT)
          );
          assertEquals(
              "Expected KRAFT_VOTERS control record type(6), but found COMMIT",
              thrown.getMessage()
          );
      }
  
      @Test
      public void testDeserializeByteData() {
          testDeserializeRecord(ControlRecordType.KRAFT_VOTERS);
      }
  
      private void testDeserializeRecord(ControlRecordType controlRecordType) {
          final int voterId = 0;
          final List<Voter> voters = Collections.singletonList(
              new Voter().setVoterId(voterId)
          );
          VotersRecord data = new VotersRecord().setVoters(voters);
  
          ByteBuffer valueBuffer = ByteBuffer.allocate(256);
          data.write(new ByteBufferAccessor(valueBuffer), new ObjectSerializationCache(), data.highestSupportedVersion());
          valueBuffer.flip();
  
          byte[] keyData = new byte[]{0, 0, 0, (byte) controlRecordType.type()};
  
          DefaultRecord record = new DefaultRecord(
              256, (byte) 0, 0, 0L, 0, ByteBuffer.wrap(keyData),  valueBuffer, null
          );
  
          VotersRecord deserializedData = ControlRecordUtils.deserializeVotersRecord(record);
  
          assertEquals(voters, deserializedData.voters());
          assertEquals(Collections.singletonList(
              new Voter().setVoterId(voterId)), deserializedData.voters());
      }
  }
  