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Merge pull request #1 from nordme/unifych
Add test functions to test new unify function
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import pytest | ||
from mne.channels import unify_bad_channels | ||
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def test_error_raising(raw, epochs): | ||
"""Tests input checking.""" | ||
with pytest.raises(TypeError, match=r"must be an instance of list"): | ||
unify_bad_channels("bad input") | ||
with pytest.raises(ValueError, match=r"insts must not be empty"): | ||
unify_bad_channels([]) | ||
with pytest.raises(TypeError, match=r"each object in insts must be an instance of"): | ||
unify_bad_channels(["bad_instance"]) | ||
with pytest.raises(ValueError, match=r"same type"): | ||
unify_bad_channels([raw, epochs]) | ||
with pytest.raises(ValueError, match=r"Channels do not match across"): | ||
raw_alt1 = raw.copy() | ||
raw_alt1.drop_channels(raw.info["ch_names"][-1]) | ||
unify_bad_channels([raw, raw_alt1]) # ch diff preserving order | ||
with pytest.raises(ValueError, match=r"sorted differently"): | ||
raw_alt2 = raw.copy() | ||
new_order = [raw.ch_names[-1]] + raw.ch_names[:-1] | ||
raw_alt2.reorder_channels(new_order) | ||
unify_bad_channels([raw, raw_alt2]) | ||
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def test_bads_compilation(raw): | ||
"""Tests that bads are compiled properly. | ||
Tests two cases: a) single instance passed to function with an existing | ||
bad, and b) multiple instances passed to function with varying compilation | ||
scenarios including empty bads, unique bads, and partially duplicated bads | ||
listed out-of-order. | ||
Only the Raw instance type is tested, since bad channel implementation is | ||
controlled across instance types with a MixIn class. | ||
""" | ||
assert raw.info["bads"] == [] | ||
chns = raw.ch_names[:3] | ||
no_bad = raw.copy() | ||
one_bad = raw.copy() | ||
one_bad.info["bads"] = [chns[1]] | ||
three_bad = raw.copy() | ||
three_bad.info["bads"] = chns | ||
# scenario 1: single instance passed with actual bads | ||
s_out = unify_bad_channels([one_bad]) | ||
assert len(s_out) == 1, len(s_out) | ||
assert s_out[0].info["bads"] == [chns[1]], (s_out[0].info["bads"], chns[1]) | ||
# scenario 2: multiple instances passed | ||
m_out = unify_bad_channels([one_bad, no_bad, three_bad]) | ||
assert len(m_out) == 3, len(m_out) | ||
expected_order = [chns[1], chns[0], chns[2]] | ||
for inst in m_out: | ||
assert inst.info["bads"] == expected_order |