def METHOD_NAME(datafile):  # uses datafile pytest fixture
    z = np.array([0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0])
    w = np.array([0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0])
    mlcp, zsol = createMLCP_fromFile(datafile)
    SO = sn.SolverOptions(sn.SICONOS_MLCP_ENUM)
    sn.mlcp_driver_init(mlcp, SO)
    info = sn.mlcp_enum(mlcp, z, w, SO)
    sn.mlcp_driver_reset(mlcp, SO)
    print("z = ", z)
    print("w = ", w)
    assert np.linalg.norm(z - zsol) <= ztol
    assert not info