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.InvalidRecordException;
  import org.apache.kafka.common.compress.Compression;
  import org.apache.kafka.common.errors.CorruptRecordException;
  import org.apache.kafka.common.utils.ByteBufferOutputStream;
  import org.apache.kafka.common.utils.Utils;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.DataOutputStream;
  import java.io.OutputStream;
  import java.nio.ByteBuffer;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class SimpleLegacyRecordTest {
  
      @Test
      public void testCompressedIterationWithNullValue() throws Exception {
          ByteBuffer buffer = ByteBuffer.allocate(128);
          DataOutputStream out = new DataOutputStream(new ByteBufferOutputStream(buffer));
          AbstractLegacyRecordBatch.writeHeader(out, 0L, LegacyRecord.RECORD_OVERHEAD_V1);
          LegacyRecord.write(out, RecordBatch.MAGIC_VALUE_V1, 1L, (byte[]) null, null,
                  CompressionType.GZIP, TimestampType.CREATE_TIME);
  
          buffer.flip();
          MemoryRecords records = MemoryRecords.readableRecords(buffer);
          assertThrows(InvalidRecordException.class, () -> records.records().iterator().hasNext());
      }
  
      @Test
      public void testCompressedIterationWithEmptyRecords() throws Exception {
          ByteBuffer emptyCompressedValue = ByteBuffer.allocate(64);
          Compression gzip = Compression.gzip().build();
          OutputStream gzipOutput = gzip.wrapForOutput(new ByteBufferOutputStream(emptyCompressedValue),
                  RecordBatch.MAGIC_VALUE_V1);
          gzipOutput.close();
          emptyCompressedValue.flip();
  
          ByteBuffer buffer = ByteBuffer.allocate(128);
          DataOutputStream out = new DataOutputStream(new ByteBufferOutputStream(buffer));
          AbstractLegacyRecordBatch.writeHeader(out, 0L, LegacyRecord.RECORD_OVERHEAD_V1 + emptyCompressedValue.remaining());
          LegacyRecord.write(out, RecordBatch.MAGIC_VALUE_V1, 1L, null, Utils.toArray(emptyCompressedValue),
                  CompressionType.GZIP, TimestampType.CREATE_TIME);
  
          buffer.flip();
  
          MemoryRecords records = MemoryRecords.readableRecords(buffer);
          assertThrows(InvalidRecordException.class, () -> records.records().iterator().hasNext());
      }
  
      /* This scenario can happen if the record size field is corrupt and we end up allocating a buffer that is too small */
      @Test
      public void testIsValidWithTooSmallBuffer() {
          ByteBuffer buffer = ByteBuffer.allocate(2);
          LegacyRecord record = new LegacyRecord(buffer);
          assertFalse(record.isValid());
          assertThrows(CorruptRecordException.class, record::ensureValid);
  
      }
  
      @Test
      public void testIsValidWithChecksumMismatch() {
          ByteBuffer buffer = ByteBuffer.allocate(4);
          // set checksum
          buffer.putInt(2);
          LegacyRecord record = new LegacyRecord(buffer);
          assertFalse(record.isValid());
          assertThrows(CorruptRecordException.class, record::ensureValid);
      }
  
  }
  