@Override
  public void setUserGroupIfNeeded(AlluxioURI uri) {
    // By default, Alluxio Fuse/client sets user/group to the user launches the Fuse application
    // no extra user group setting required
  }
@Test
  public void setUserGroupIfNeeded() {
    AlluxioURI uri = new AlluxioURI("/TestSetUserGroupIfNeeded");
    mAuthPolicy.setUserGroupIfNeeded(uri);
    // No need to set user group
    Assert.assertThrows(FileDoesNotExistException.class, () -> mFileSystem.getStatus(uri));
  }