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.errors.CorruptRecordException;
  
  import org.junit.jupiter.api.extension.ExtensionContext;
  import org.junit.jupiter.params.provider.Arguments;
  import org.junit.jupiter.params.provider.ArgumentsProvider;
  
  import java.nio.ByteBuffer;
  import java.util.Optional;
  import java.util.stream.Stream;
  
  public final class InvalidMemoryRecordsProvider implements ArgumentsProvider {
      // Use a baseOffset that's not zero so that it is less likely to match the LEO
      private static final long BASE_OFFSET = 1234;
      private static final int EPOCH = 4321;
  
      /**
       * Returns a stream of arguments for invalid memory records and the expected exception.
       *
       * The first object in the {@code Arguments} is a {@code MemoryRecords}.
       *
       * The second object in the {@code Arguments} is an {@code Optional<Class<Exception>>} which is
       * the expected exception from the log layer.
       */
      @Override
      public Stream<? extends Arguments> provideArguments(ExtensionContext context) {
          return Stream.of(
              Arguments.of(MemoryRecords.readableRecords(notEnoughBytes()), Optional.empty()),
              Arguments.of(MemoryRecords.readableRecords(recordsSizeTooSmall()), Optional.of(CorruptRecordException.class)),
              Arguments.of(MemoryRecords.readableRecords(notEnoughBytesToMagic()), Optional.empty()),
              Arguments.of(MemoryRecords.readableRecords(negativeMagic()), Optional.of(CorruptRecordException.class)),
              Arguments.of(MemoryRecords.readableRecords(largeMagic()), Optional.of(CorruptRecordException.class)),
              Arguments.of(MemoryRecords.readableRecords(lessBytesThanRecordSize()), Optional.empty())
          );
      }
  
      private static ByteBuffer notEnoughBytes() {
          var buffer = ByteBuffer.allocate(Records.LOG_OVERHEAD - 1);
          buffer.limit(buffer.capacity());
  
          return buffer;
      }
  
      private static ByteBuffer recordsSizeTooSmall() {
          var buffer = ByteBuffer.allocate(256);
          // Write the base offset
          buffer.putLong(BASE_OFFSET);
          // Write record size
          buffer.putInt(LegacyRecord.RECORD_OVERHEAD_V0 - 1);
          buffer.position(0);
          buffer.limit(buffer.capacity());
  
          return buffer;
      }
  
      private static ByteBuffer notEnoughBytesToMagic() {
          var buffer = ByteBuffer.allocate(256);
          // Write the base offset
          buffer.putLong(BASE_OFFSET);
          // Write record size
          buffer.putInt(buffer.capacity() - Records.LOG_OVERHEAD);
          buffer.position(0);
          buffer.limit(Records.HEADER_SIZE_UP_TO_MAGIC - 1);
  
          return buffer;
      }
  
      private static ByteBuffer negativeMagic() {
          var buffer = ByteBuffer.allocate(256);
          // Write the base offset
          buffer.putLong(BASE_OFFSET);
          // Write record size
          buffer.putInt(buffer.capacity() - Records.LOG_OVERHEAD);
          // Write the epoch
          buffer.putInt(EPOCH);
          // Write magic
          buffer.put((byte) -1);
          buffer.position(0);
          buffer.limit(buffer.capacity());
  
          return buffer;
      }
  
      private static ByteBuffer largeMagic() {
          var buffer = ByteBuffer.allocate(256);
          // Write the base offset
          buffer.putLong(BASE_OFFSET);
          // Write record size
          buffer.putInt(buffer.capacity() - Records.LOG_OVERHEAD);
          // Write the epoch
          buffer.putInt(EPOCH);
          // Write magic
          buffer.put((byte) (RecordBatch.CURRENT_MAGIC_VALUE + 1));
          buffer.position(0);
          buffer.limit(buffer.capacity());
  
          return buffer;
      }
  
      private static ByteBuffer lessBytesThanRecordSize() {
          var buffer = ByteBuffer.allocate(256);
          // Write the base offset
          buffer.putLong(BASE_OFFSET);
          // Write record size
          buffer.putInt(buffer.capacity() - Records.LOG_OVERHEAD);
          // Write the epoch
          buffer.putInt(EPOCH);
          // Write magic
          buffer.put(RecordBatch.CURRENT_MAGIC_VALUE);
          buffer.position(0);
          buffer.limit(buffer.capacity() - Records.LOG_OVERHEAD - 1);
  
          return buffer;
      }
  }
  