def METHOD_NAME(self):
    res_spin_file = f"{TEST_FILES_DIR}/res/spins-in-last-col.res"
    with open(res_spin_file) as res_file:
        contents = res_file.read()
    provider = AirssProvider.from_str(contents)
    for site in provider.structure:
        if site.properties["magmom"] is not None:
            assert site.properties.get("magmom") in (3.31, 4.12, -0.01, -0.04, -0.17)