def METHOD_NAME():
    builder = UserDataBuilder(user_data_objects=[])
    user_data_yaml = builder.build_user_data_yaml()
    loaded_yaml = yaml.safe_load(user_data_yaml)
    assert not loaded_yaml["packages"]
    assert not loaded_yaml["write_files"]
    assert loaded_yaml["runcmd"] == ['mkdir -p /tmp/cloud-init && touch /tmp/cloud-init/done']