def test_rename_channels():
    """Test rename channels
    """
    info = read_info(raw_fname)
    # Error Tests
    # Test channel name exists in ch_names
    mapping = {'EEG 160': 'EEG060'}
    assert_raises(ValueError, rename_channels, info, mapping)
    # Test improper mapping configuration
    mapping = {'MEG 2641': 1.0}
    assert_raises(ValueError, rename_channels, info, mapping)
    # Test non-unique mapping configuration
    mapping = {'MEG 2641': 'MEG 2642'}
    assert_raises(ValueError, rename_channels, info, mapping)
    # Test bad input
    assert_raises(ValueError, rename_channels, info, 1.)

    # Test successful changes
    # Test ch_name and ch_names are changed
    info2 = deepcopy(info)  # for consistency at the start of each test
    info2['bads'] = ['EEG 060', 'EOG 061']
    mapping = {'EEG 060': 'EEG060', 'EOG 061': 'EOG061'}
    rename_channels(info2, mapping)
    assert_true(info2['chs'][374]['ch_name'] == 'EEG060')
    assert_true(info2['ch_names'][374] == 'EEG060')
    assert_true(info2['chs'][375]['ch_name'] == 'EOG061')
    assert_true(info2['ch_names'][375] == 'EOG061')
    assert_array_equal(['EEG060', 'EOG061'], info2['bads'])
    info2 = deepcopy(info)
    rename_channels(info2, lambda x: x.replace(' ', ''))
    assert_true(info2['chs'][373]['ch_name'] == 'EEG059')
    info2 = deepcopy(info)
    info2['bads'] = ['EEG 060', 'EEG 060']
    rename_channels(info2, mapping)
    assert_array_equal(['EEG060', 'EEG060'], info2['bads'])
dataset/ETHPy150Open mne-tools/mne-python/mne/channels/tests/test_channels.py/test_rename_channels/original