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.client.cli.fs.command;
  
  import static org.junit.Assert.assertEquals;
  
  import alluxio.client.cli.fs.AbstractFileSystemShellTest;
  import alluxio.util.io.PathUtils;
  
  import com.google.common.base.Joiner;
  import com.google.common.io.Files;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Tests for cross-mount {@link alluxio.cli.fs.command.DistributedCpCommand}.
   */
  public final class DistributedCpCommandTest extends AbstractFileSystemShellTest {
    @Rule
    public TemporaryFolder mFolder = new TemporaryFolder();
  
    @Test
    public void crossMountCopy() throws Exception {
      File file = mFolder.newFile();
      Files.write("hello".getBytes(), file);
      run("mount", "/cross", mFolder.getRoot().getAbsolutePath());
      run("ls", "-f", "/cross");
      run("distributedCp", PathUtils.concatPath("/cross", file.getName()), "/copied");
      mOutput.reset();
      run("cat", "/copied");
      assertEquals("hello", mOutput.toString());
    }
  
    @Test
    public void crossMountCopyWithBatch() throws Exception {
      File file = mFolder.newFile();
      File file2 = mFolder.newFile();
      Files.write("hello".getBytes(), file);
      Files.write("world".getBytes(), file2);
      run("mount", "/cross", mFolder.getRoot().getAbsolutePath());
      run("ls", "-f", "/cross");
      run("distributedCp", "--batch-size", "2", "/cross", "/copied");
      mOutput.reset();
      run("cat", PathUtils.concatPath("/copied", file.getName()));
      assertEquals("hello", mOutput.toString());
      mOutput.reset();
      run("cat", PathUtils.concatPath("/copied", file2.getName()));
      assertEquals("world", mOutput.toString());
    }
  
    @Test
    public void crossMountCopyLotsFilesWithSmallBatchSize() throws Exception {
      int fileSize = 100;
      List<File> files = new ArrayList<>(fileSize);
      for (int i = 0; i < fileSize; i++) {
        File file = mFolder.newFile();
        String content = "hello" + i;
        Files.write(content.getBytes(), file);
        files.add(file);
      }
      run("mount", "/cross", mFolder.getRoot().getAbsolutePath());
      run("ls", "-f", "/cross");
      run("distributedCp", "--batch-size", "3", "/cross", "/copied");
      for (int i = 0; i < fileSize; i++) {
        mOutput.reset();
        run("cat", PathUtils.concatPath("/copied", files.get(i).getName()));
        assertEquals("hello" + i, mOutput.toString());
      }
    }
  
    @Test
    public void crossMountCopyNestedFilesWithBatch() throws Exception {
      int fileSize = 10;
      List<File> files = new ArrayList<>(fileSize);
      List<File> subFolderFiles = new ArrayList<>(fileSize);
      List<File> subSubFolderFiles = new ArrayList<>(fileSize);
      File subDir = mFolder.newFolder("subFolder");
      File subSubDir = mFolder.newFolder("subFolder", "subSubFolder");
      for (int i = 0; i < fileSize; i++) {
        File file = mFolder.newFile();
        String content = "hello" + i;
        Files.write(content.getBytes(), file);
        files.add(file);
        file = new File(subDir, "subFile" + i);
        content = "world" + i;
        Files.write(content.getBytes(), file);
        subFolderFiles.add(file);
        file = new File(subSubDir, "subSubFile" + i);
        content = "game" + i;
        Files.write(content.getBytes(), file);
        subSubFolderFiles.add(file);
      }
      run("mount", "/cross", mFolder.getRoot().getAbsolutePath());
      run("ls", "-f", "/cross");
      run("distributedCp", "--batch-size", "13", "/cross", "/copied");
      for (int i = 0; i < fileSize; i++) {
        mOutput.reset();
        run("cat", PathUtils.concatPath("/copied", files.get(i).getName()));
        assertEquals("hello" + i, mOutput.toString());
        mOutput.reset();
        run("cat",
            PathUtils.concatPath("/copied", subDir.getName(), subFolderFiles.get(i).getName()));
        assertEquals("world" + i, mOutput.toString());
        mOutput.reset();
        run("cat", PathUtils.concatPath("/copied", subDir.getName(), subSubDir.getName(),
            subSubFolderFiles.get(i).getName()));
        assertEquals("game" + i, mOutput.toString());
      }
    }
  
    private void run(String ...args) {
      if (sFsShell.run(args) != 0) {
        throw new RuntimeException(
            "Failed command <" + Joiner.on(" ").join(args) + "> " + mOutput.toString());
      }
    }
  }
  