@Override
  public FSDataOutputStream create(final Path f, final FsPermission permission,
      final boolean overwrite, final int bufferSize, final short replication,
      final long blockSize, final Progressable progress) throws IOException {
    return super.create(fullPath(f), permission, overwrite, bufferSize,
        replication, blockSize, progress);
  }
@Test
  public void testURIEmptyPath() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);

    URI chrootUri = URI.create("mockfs://foo");
    new ChRootedFileSystem(chrootUri, conf);
  }