code: def test_invalid_subject_birthday():
      """Test handling of an invalid birthday in the raw file."""
      with pytest.warns(
          RuntimeWarning, match="No birthday will be set"
      ):
          raw = read_raw_fif(raw_invalid_bday_fname)
      assert "birthday" not in raw.info["subject_info"]
  
imports: import pickle
  import string
  from datetime import date, datetime, timedelta, timezone
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_equal
  from scipy import sparse
  from mne import Annotations, Epochs, compute_covariance, make_forward_solution, make_sphere_model, pick_info, pick_types, read_cov, read_epochs, read_events, read_evokeds, read_forward_solution, setup_volume_source_space, write_cov, write_forward_solution
  from mne._fiff import meas_info
  from mne._fiff._digitization import DigPoint, _make_dig_points
  from mne._fiff.constants import FIFF
  from mne._fiff.meas_info import RAW_INFO_FIELDS, Info, MNEBadsList, _add_timedelta_to_stamp, _bad_chans_comp, _dt_to_stamp, _force_update_info, _get_valid_units, _merge_info, _read_extended_ch_info, _stamp_to_dt, anonymize_info, create_info, read_fiducials, read_info, write_fiducials, write_info
  from mne._fiff.proj import Projection
  from mne._fiff.tag import _coil_trans_to_loc, _loc_to_coil_trans
  from mne._fiff.write import DATE_NONE, _generate_meas_id
  from mne.channels import equalize_channels, make_standard_montage, read_polhemus_fastscan
  from mne.datasets import testing
  from mne.event import make_fixed_length_events
  from mne.io import BaseRaw, RawArray, read_raw_ctf, read_raw_fif
  from mne.minimum_norm import apply_inverse, make_inverse_operator, read_inverse_operator, write_inverse_operator
  from mne.transforms import Transform
  from mne.utils import _empty_hash, _record_warnings, assert_object_equal, catch_logging
label_desc: Use image node_id 26 for calling a global function with example usage: test_invalid_subject_birthday() without return types