content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.master.journal.checkpoint;
  
  import net.bytebuddy.utility.RandomString;
  import org.apache.ratis.io.MD5Hash;
  import org.apache.ratis.util.MD5FileUtil;
  import org.junit.Assert;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.security.MessageDigest;
  import java.util.Arrays;
  import java.util.Collection;
  
  @RunWith(Parameterized.class)
  public class CheckpointStreamTest {
    @Parameterized.Parameters
    public static Collection<CheckpointType> data() {
      return Arrays.asList(CheckpointType.values());
    }
  
    @Parameterized.Parameter
    public CheckpointType mType;
  
    @Rule
    public TemporaryFolder mFolder = new TemporaryFolder();
  
    @Test
    public void regularStreamTest() throws IOException {
      File file = mFolder.newFile();
      byte[] contents = RandomString.make().getBytes();
      try (CheckpointOutputStream outputStream =
               new CheckpointOutputStream(Files.newOutputStream(file.toPath()), mType)) {
        outputStream.write(contents);
      }
      byte[] retrieved = new byte[contents.length];
      try (CheckpointInputStream s = new CheckpointInputStream(Files.newInputStream(file.toPath()))) {
        Assert.assertEquals(mType, s.getType());
        s.read(retrieved);
      }
      Assert.assertArrayEquals(contents, retrieved);
    }
  
    @Test
    public void optimizedStreamTest() throws IOException {
      File file = mFolder.newFile();
      MessageDigest md5Out = MD5Hash.getDigester();
      byte[] contents = RandomString.make().getBytes();
      try (CheckpointOutputStream outputStream =
               new CheckpointOutputStream(new OptimizedCheckpointOutputStream(file, md5Out), mType)) {
        outputStream.write(contents);
      }
      MD5FileUtil.saveMD5File(file, new MD5Hash(md5Out.digest()));
      MessageDigest md5In = MD5Hash.getDigester();
      byte[] retrieved = new byte[contents.length];
      try (CheckpointInputStream s = new OptimizedCheckpointInputStream(file, md5In)) {
        Assert.assertEquals(mType, s.getType());
        s.read(retrieved);
      }
      MD5FileUtil.verifySavedMD5(file, new MD5Hash(md5In.digest()));
      Assert.assertArrayEquals(contents, retrieved);
    }
  }
  