@testing.requires_testing_data
def test_read_labels_from_annot():
    """Test reading labels from FreeSurfer parcellation
    """
    # test some invalid inputs
    assert_raises(ValueError, read_labels_from_annot, 'sample', hemi='bla',
                  subjects_dir=subjects_dir)
    assert_raises(ValueError, read_labels_from_annot, 'sample',
                  annot_fname='bla.annot', subjects_dir=subjects_dir)

    # read labels using hemi specification
    labels_lh = read_labels_from_annot('sample', hemi='lh',
                                       subjects_dir=subjects_dir)
    for label in labels_lh:
        assert_true(label.name.endswith('-lh'))
        assert_true(label.hemi == 'lh')
        # XXX fails on 2.6 for some reason...
        if (2, 6) > sys.version_info[:2]:
            assert_is_not(label.color, None)

    # read labels using annot_fname
    annot_fname = op.join(subjects_dir, 'sample', 'label', 'rh.aparc.annot')
    labels_rh = read_labels_from_annot('sample', annot_fname=annot_fname,
                                       subjects_dir=subjects_dir)
    for label in labels_rh:
        assert_true(label.name.endswith('-rh'))
        assert_true(label.hemi == 'rh')
        assert_is_not(label.color, None)

    # combine the lh, rh, labels and sort them
    labels_lhrh = list()
    labels_lhrh.extend(labels_lh)
    labels_lhrh.extend(labels_rh)

    names = [label.name for label in labels_lhrh]
    labels_lhrh = [label for (name, label) in sorted(zip(names, labels_lhrh))]

    # read all labels at once
    labels_both = read_labels_from_annot('sample', subjects_dir=subjects_dir)

    # we have the same result
    _assert_labels_equal(labels_lhrh, labels_both)

    # aparc has 68 cortical labels
    assert_true(len(labels_both) == 68)

    # test regexp
    label = read_labels_from_annot('sample', parc='aparc.a2009s',
                                   regexp='Angu', subjects_dir=subjects_dir)[0]
    assert_true(label.name == 'G_pariet_inf-Angular-lh')
    # silly, but real regexp:
    label = read_labels_from_annot('sample', 'aparc.a2009s',
                                   regexp='.*-.{4,}_.{3,3}-L',
                                   subjects_dir=subjects_dir)[0]
    assert_true(label.name == 'G_oc-temp_med-Lingual-lh')
    assert_raises(RuntimeError, read_labels_from_annot, 'sample', parc='aparc',
                  annot_fname=annot_fname, regexp='JackTheRipper',
                  subjects_dir=subjects_dir)
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