@Override
  public boolean rename(Path src, Path dst) throws IOException {
    return fs.rename(src, dst);
  }
@Test
  public void testRenameOptions() throws Exception {
    FileSystem mockFs = mock(FileSystem.class);
    FileSystem fs = new FilterFileSystem(mockFs);
    Path src = new Path("/src");
    Path dst = new Path("/dest");
    Rename opt = Rename.TO_TRASH;
    fs.rename(src, dst, opt);
    verify(mockFs).rename(eq(src), eq(dst), eq(opt));
  }