@Override
  public boolean isFile(String path) throws IOException {
    path = stripPath(path);
    File file = new File(path);
    return file.isFile();
  }
@Test
  public void isFile() throws IOException {
    String dirpath = PathUtils.concatPath(mLocalUfsRoot, getUniqueFileName());
    mLocalUfs.mkdirs(dirpath);
    assertFalse(mLocalUfs.isFile(dirpath));

    String filepath = PathUtils.concatPath(mLocalUfsRoot, getUniqueFileName());
    mLocalUfs.create(filepath).close();
    assertTrue(mLocalUfs.isFile(filepath));
  }