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.streams.state.internals;
  
  import org.apache.kafka.clients.consumer.ConsumerRecord;
  import org.apache.kafka.common.header.internals.RecordHeaders;
  import org.apache.kafka.common.record.TimestampType;
  
  import org.junit.jupiter.api.Test;
  
  import java.nio.ByteBuffer;
  import java.util.Optional;
  
  import static org.apache.kafka.streams.state.internals.RecordConverters.rawValueToTimestampedValue;
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  
  public class RecordConvertersTest {
  
      private final RecordConverter timestampedValueConverter = rawValueToTimestampedValue();
  
      @Test
      public void shouldPreserveNullValueOnConversion() {
          final ConsumerRecord<byte[], byte[]> nullValueRecord = new ConsumerRecord<>("", 0, 0L, new byte[0], null);
          assertNull(timestampedValueConverter.convert(nullValueRecord).value());
      }
  
      @Test
      public void shouldAddTimestampToValueOnConversionWhenValueIsNotNull() {
          final long timestamp = 10L;
          final byte[] value = new byte[1];
          final ConsumerRecord<byte[], byte[]> inputRecord = new ConsumerRecord<>(
                  "topic", 1, 0, timestamp, TimestampType.CREATE_TIME, 0, 0, new byte[0], value,
                  new RecordHeaders(), Optional.empty());
          final byte[] expectedValue = ByteBuffer.allocate(9).putLong(timestamp).put(value).array();
          final byte[] actualValue = timestampedValueConverter.convert(inputRecord).value();
          assertArrayEquals(expectedValue, actualValue);
      }
  }
  