How to use the tubeup.TubeUp.DOWNLOAD_DIR_NAME function in tubeup

def test_set_dir_path(self):
        root_path = os.path.join(
            current_path, '.directory_for_tubeup_set_dir_path_test')
        dir_paths_dict = dict(root=root_path,
                              downloads=os.path.join(root_path,
                                                     DOWNLOAD_DIR_NAME))

        self.tu.dir_path = root_path
        self.assertEqual(self.tu.dir_path, dir_paths_dict)

        # Make sure that other directories are created as well
        self.assertTrue(os.path.exists(dir_paths_dict['downloads']))

        # Clean the test directory
        shutil.rmtree(root_path, ignore_errors=True)