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.fuse.ufs;
  
  import static org.junit.Assert.assertEquals;
  
  import alluxio.Constants;
  import alluxio.fuse.AlluxioJniRenameUtils;
  import alluxio.jnifuse.ErrorCodes;
  import alluxio.jnifuse.struct.FileStat;
  import alluxio.jnifuse.struct.Statvfs;
  import alluxio.security.authorization.Mode;
  import alluxio.util.io.BufferUtils;
  
  import org.junit.Assert;
  import org.junit.Assume;
  import org.junit.Test;
  
  import java.nio.ByteBuffer;
  
  /**
   * Isolation tests for {@link alluxio.fuse.AlluxioJniFuseFileSystem} with local UFS.
   * This test covers the basic file system metadata operations.
   */
  public class FuseFileSystemMetadataTest extends AbstractFuseFileSystemTest {
    @Test
    public void createDeleteFile() {
      createEmptyFile(FILE);
      Assert.assertEquals(0, mFuseFs.getattr(FILE, mFileStat));
      Assert.assertEquals(0, mFuseFs.unlink(FILE));
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(FILE, mFileStat));
    }
  
    @Test
    public void getAttrNonExisting() {
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(FILE, mFileStat));
    }
  
    @Test
    public void createDirectory() {
      Assert.assertEquals(0, mFuseFs.mkdir(DIR, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.getattr(DIR, mFileStat));
    }
  
    @Test
    public void createDirectoryWithLengthLimit() {
      assertEquals(-ErrorCodes.ENAMETOOLONG(),
          mFuseFs.mkdir(EXCEED_LENGTH_PATH_NAME, DEFAULT_MODE.toShort()));
    }
  
    @Test
    public void createDeleteDirectory() {
      Assert.assertEquals(0, mFuseFs.mkdir(DIR, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.getattr(DIR, mFileStat));
      Assert.assertEquals(0, mFuseFs.unlink(DIR));
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(DIR, mFileStat));
    }
  
    @Test
    public void createDeleteNonEmptyDirectory() {
      Assert.assertEquals(0, mFuseFs.mkdir("dir", DEFAULT_MODE.toShort()));
      createEmptyFile("/dir/file");
      Assert.assertEquals(0, mFuseFs.unlink(DIR));
    }
  
    @Test
    public void rmdir() {
      Assert.assertEquals(0, mFuseFs.mkdir(DIR, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.getattr(DIR, mFileStat));
      Assert.assertEquals(0, mFuseFs.rmdir(DIR));
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(DIR, mFileStat));
    }
  
    @Test
    public void rmdirNotEmpty() {
      Assert.assertEquals(0, mFuseFs.mkdir("dir", DEFAULT_MODE.toShort()));
      createEmptyFile("/dir/file");
      Assert.assertEquals(0, mFuseFs.rmdir(DIR));
    }
  
    @Test
    public void renameFile() {
      String src = "/src";
      String dst = "/dst";
      createEmptyFile(src);
      Assert.assertEquals(0, mFuseFs.getattr(src, mFileStat));
      Assert.assertEquals(0, mFuseFs.rename(src, dst, AlluxioJniRenameUtils.NO_FLAGS));
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(src, mFileStat));
      Assert.assertEquals(0, mFuseFs.getattr(dst, mFileStat));
    }
  
    @Test
    public void renameDirectory() {
      String src = "/src";
      String dst = "/dst";
      Assert.assertEquals(0, mFuseFs.mkdir(src, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.getattr(src, mFileStat));
      mFuseFs.rename(src, dst, AlluxioJniRenameUtils.NO_FLAGS);
      Assert.assertEquals(-ErrorCodes.ENOENT(), mFuseFs.getattr(src, mFileStat));
      Assert.assertEquals(0, mFuseFs.getattr(dst, mFileStat));
    }
  
    @Test
    public void renameSrcNotExist() {
      assertEquals(-ErrorCodes.ENOENT(),
          mFuseFs.rename("/src", "/dst", AlluxioJniRenameUtils.NO_FLAGS));
    }
  
    // TODO(lu) different rename flags
    @Test
    public void renameDstFileExist() {
      String src = "/src";
      String dst = "/dst";
      createEmptyFile(src);
      createEmptyFile(dst);
      Assert.assertEquals(0, mFuseFs.rename(src, dst, AlluxioJniRenameUtils.NO_FLAGS));
    }
  
    @Test
    public void renameDstDirectoryExist() {
      String src = "/src";
      String dst = "/dst";
      Assert.assertEquals(0, mFuseFs.mkdir(src, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.mkdir(dst, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.rename(src, dst, AlluxioJniRenameUtils.NO_FLAGS));
    }
  
    @Test
    public void renameWithLengthLimit() {
      String src = "/src";
      createEmptyFile(src);
      assertEquals(-ErrorCodes.ENAMETOOLONG(),
          mFuseFs.rename(src, EXCEED_LENGTH_PATH_NAME, AlluxioJniRenameUtils.NO_FLAGS));
    }
  
    @Test
    public void statfs() {
      ByteBuffer buffer = ByteBuffer.allocateDirect(4 * Constants.KB);
      try {
        buffer.clear();
        Statvfs stbuf = Statvfs.of(buffer);
        assertEquals(0, mFuseFs.statfs("/", stbuf));
      } finally {
        BufferUtils.cleanDirectBuffer(buffer);
      }
    }
  
    /**
     * Supported by local UFS and S3.
     */
    @Test
    public void overwriteExistingDirectoryLocalS3Ufs() {
      Assert.assertEquals(0, mFuseFs.mkdir(DIR, DEFAULT_MODE.toShort()));
      Assert.assertEquals(0, mFuseFs.mkdir(DIR, DEFAULT_MODE.toShort()));
    }
  
    @Test
    public void chmod() {
      // S3 does not have mode concept and mode will always be 700.
      Assume.assumeTrue(mIsLocalUFS);
      createEmptyFile(FILE);
      Mode mode = new Mode(Mode.Bits.EXECUTE, Mode.Bits.WRITE, Mode.Bits.READ);
      mFuseFs.chmod(FILE, mode.toShort());
      FileStat stat = FileStat.of(ByteBuffer.allocateDirect(256));
      Assert.assertEquals(0, mFuseFs.getattr(FILE, stat));
      Mode res = new Mode(stat.st_mode.shortValue());
      Assert.assertEquals(mode.getOwnerBits(), res.getOwnerBits());
      Assert.assertEquals(mode.getGroupBits(), res.getGroupBits());
      Assert.assertEquals(mode.getOtherBits(), res.getOtherBits());
    }
  }
  