def METHOD_NAME(cls, download_dir: str, force_download: bool):
    trial_filename = TRIAL_FILE_URL.split("/")[-1]
    trial_filepath = Path(download_dir) / trial_filename
    _download(trial_filepath, TRIAL_FILE_URL, refresh=force_download)
    trial_list = open(trial_filepath, "r").readlines()
    test_trials = []
    for string in tqdm(trial_list, desc="Prepare testing trials"):
        pair = string.split()
        test_trials.append(
            (int(pair[0]), cls.path2uid(pair[1]), cls.path2uid(pair[2]))
        )
    return test_trials