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# Authors: The MNE-Python contributors.
# License: BSD-3-Clause
# Copyright the MNE-Python contributors.
from pathlib import Path
import numpy as np
import pytest
from numpy.testing import assert_array_equal
from mne.io.kit import read_mrk
mrk_fname = Path(__file__).parent / "data" / "test_mrk.sqd"
def test_io_mrk(tmp_path):
"""Test IO for mrk files."""
pts = read_mrk(mrk_fname)
# txt
path = tmp_path / "mrk.txt"
with open(path, "wb") as fid:
fid.write(b"%% %d 3D points, x y z per line\n" % len(pts))
np.savetxt(fid, pts, delimiter="\t", newline="\n")
pts_2 = read_mrk(path)
assert_array_equal(pts, pts_2, "read/write mrk to text")
# unsupported extension
fname = tmp_path / "file.ext"
with pytest.raises(FileNotFoundError, match="does not exist"):
read_mrk(fname)
fname.write_text("")
with pytest.raises(ValueError, match="file extension"):
read_mrk(fname)
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