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# Authors: Denis A. Engemann <denis.engemann@gmail.com>
# Eric Larson <larson.eric.d@gmail.com>
# License: Simplified BSD
import os.path as op
import numpy as np
from numpy.testing import assert_array_equal
from mne.io import read_info
from mne.io.constants import FIFF
base_dir = op.join(op.dirname(__file__), 'data')
raw_fname = op.join(base_dir, 'test_chpi_raw_sss.fif')
def test_maxfilter_io():
"""Test maxfilter io."""
info = read_info(raw_fname)
mf = info['proc_history'][1]['max_info']
assert mf['sss_info']['frame'] == FIFF.FIFFV_COORD_HEAD
# based on manual 2.0, rev. 5.0 page 23
assert 5 <= mf['sss_info']['in_order'] <= 11
assert mf['sss_info']['out_order'] <= 5
assert mf['sss_info']['nchan'] > len(mf['sss_info']['components'])
assert (info['ch_names'][:mf['sss_info']['nchan']] ==
mf['sss_ctc']['proj_items_chs'])
assert (mf['sss_ctc']['decoupler'].shape ==
(mf['sss_info']['nchan'], mf['sss_info']['nchan']))
assert_array_equal(
np.unique(np.diag(mf['sss_ctc']['decoupler'].toarray())),
np.array([1.], dtype=np.float32))
assert mf['sss_cal']['cal_corrs'].shape == (306, 14)
assert mf['sss_cal']['cal_chans'].shape == (306, 2)
vv_coils = [v for k, v in FIFF.items() if 'FIFFV_COIL_VV' in k]
assert all(k in vv_coils for k in set(mf['sss_cal']['cal_chans'][:, 1]))
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