code: def test_oserror(self, tmpdir):
      dataset = wikimedia.Wikipedia(data_dir=str(tmpdir))
      with pytest.raises(OSError):
          _ = list(dataset.texts())
  
imports: import os
  import re
  import pytest
  from textacy.datasets import wikimedia
label_desc: Use image node_id 2 for calling the TestWikipedia obj's underlying member method code with example usage: obj.test_oserror(tmpdir) without return types