# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
# vi: set ft=python sts=4 ts=4 sw=4 et:
from nipype.interfaces.ants import registration
import os
import pytest


def test_ants_mand(tmpdir):
    tmpdir.chdir()
    filepath = os.path.dirname(os.path.realpath(__file__))
    datadir = os.path.realpath(os.path.join(filepath, "../../../testing/data"))

    ants = registration.ANTS()
    ants.inputs.transformation_model = "SyN"
    ants.inputs.moving_image = [os.path.join(datadir, "resting.nii")]
    ants.inputs.fixed_image = [os.path.join(datadir, "T1.nii")]
    ants.inputs.metric = ["MI"]

    with pytest.raises(ValueError) as er:
        ants.run()
    assert "ANTS requires a value for input 'radius'" in str(er.value)