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# Authors: Christian Brodbeck <christianbrodbeck@nyu.edu>
#
# License: BSD (3-clause)
import os
from numpy.testing import assert_array_equal
from nose.tools import assert_true, assert_false, assert_equal
from mne.datasets import sample
from mne.utils import _TempDir, requires_traits
sample_path = sample.data_path(download=False)
subjects_dir = os.path.join(sample_path, 'subjects')
tempdir = _TempDir()
tgt_fname = os.path.join(tempdir, 'test-fiducials.fif')
@sample.requires_sample_data
@requires_traits
def test_mri_model():
"""Test MRIHeadWithFiducialsModel Traits Model"""
from mne.gui._fiducials_gui import MRIHeadWithFiducialsModel
model = MRIHeadWithFiducialsModel(subjects_dir=subjects_dir)
model.subject = 'sample'
assert_equal(model.default_fid_fname[-20:], "sample-fiducials.fif")
assert_false(model.can_reset)
assert_false(model.can_save)
model.lpa = [[-1, 0, 0]]
model.nasion = [[ 0, 1, 0]]
model.rpa = [[ 1, 0, 0]]
assert_false(model.can_reset)
assert_true(model.can_save)
bem_fname = os.path.basename(model.bem.file)
assert_false(model.can_reset)
assert_equal(bem_fname, 'sample-head.fif')
model.save(tgt_fname)
assert_equal(model.fid_file, tgt_fname)
# resetting the file should not affect the model's fiducials
model.fid_file = ''
assert_array_equal(model.lpa, [[-1, 0, 0]])
assert_array_equal(model.nasion, [[ 0, 1, 0]])
assert_array_equal(model.rpa, [[ 1, 0, 0]])
# reset model
model.lpa = [[0, 0, 0]]
model.nasion = [[0, 0, 0]]
model.rpa = [[0, 0, 0]]
assert_array_equal(model.lpa, [[0, 0, 0]])
assert_array_equal(model.nasion, [[0, 0, 0]])
assert_array_equal(model.rpa, [[0, 0, 0]])
# loading the file should assign the model's fiducials
model.fid_file = tgt_fname
assert_array_equal(model.lpa, [[-1, 0, 0]])
assert_array_equal(model.nasion, [[ 0, 1, 0]])
assert_array_equal(model.rpa, [[ 1, 0, 0]])
# after changing from file model should be able to reset
model.nasion = [[1, 1, 1]]
assert_true(model.can_reset)
model.reset = True
assert_array_equal(model.nasion, [[ 0, 1, 0]])
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