handle concatenation order in test by patching

    dummy_md_files = FORMAT_TO_METADATA_FILES.get(input_fmt, list())

    # copy input files

    files_copied = list()

    for f in dummy_input_files:

        f_out = input_path.joinpath(f.name).resolve().absolute()

        # need at least 2s of input files for gen-patt to be happy (can not keep the tolerance for 50 frames only)

            md_f_out = ".".join([str(f_out), suffix])

            shutil.copy(md_f, md_f_out)

        files_copied.append(f_out.name)

    # create background noise files with white noise

    if "background_noise" in config.preprocessing_2:

        # always set the same seed to have reproducible test noises

        ).absolute()

        write(bg_noise_path, noise)

    return files_copied

def all_lengths_equal(cfg):

    output_folder = cfg.output_path

    args = Arguments(str(cfg))

    config = TestConfig(cfg)

    setup_input_files_for_config(config)

    input_filenames = setup_input_files_for_config(config)

    # patch concatenation order

    if config.preprocessing_2.get("concatenate_input", None) is not None:

        config.preprocessing_2["concatenation_order"] = sorted(input_filenames)

    generate_test(args)

    if not all_lengths_equal(config):