content: /*
   * Copyright 2025 Aiven Oy
   *
   * Licensed 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 io.aiven.kafka.tieredstorage.storage.s3;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.Random;
  
  import org.junit.jupiter.api.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  class ByteBufferMarkableInputStreamTest {
  
      @Test
      void readAfterAllBytesReadWithoutReset() throws IOException {
          final byte[] buffer = new byte[10];
          new Random().nextBytes(buffer);
          try (ByteBufferMarkableInputStream inputStream = new ByteBufferMarkableInputStream(ByteBuffer.wrap(buffer))){
              assertThat(inputStream.markSupported()).isTrue();
              assertThat(inputStream.available()).isEqualTo(10);
              inputStream.readAllBytes();
              assertThat(inputStream.available()).isEqualTo(0);
              final int read = inputStream.read();
              assertThat(read).isEqualTo(-1);
          }
      }
  
      @Test
      void readAfterAllBytesReadAndReset() throws IOException {
          final byte[] buffer = new byte[10];
          new Random().nextBytes(buffer);
          try (ByteBufferMarkableInputStream inputStream = new ByteBufferMarkableInputStream(ByteBuffer.wrap(buffer))){
              inputStream.mark(0);
              inputStream.readAllBytes();
              assertThat(inputStream.available()).isEqualTo(0);
              //reset and try to read again
              inputStream.reset();
              assertThat(inputStream.available()).isEqualTo(10);
              final int read = inputStream.read();
              assertThat(read).isNotEqualTo(-1);
          }
      }
  }
  