code: def test_unreadable_file():
      garbage = b"awdadbj30993urfj"
  
      with pytest.raises(OSError):
          iio.imread(garbage)
  
imports: import datetime
  import numpy
  import pytest
  import io
  from copy import deepcopy
  import struct
  import imageio.v3
  from imageio.config import known_plugins, known_extensions
label_desc: Use image node_id 23 for calling a global function with example usage: test_unreadable_file() without return types