code: def test_InvalidFile(self):
      invalid_file = invalid_textfile(self.tmpdir)
      assert_raises(OSError, self.ds.open, invalid_file)
  
imports: import os
  import pytest
  from tempfile import mkdtemp, mkstemp, NamedTemporaryFile
  from shutil import rmtree
  import numpy.lib._datasource
  from numpy.testing import assert_, assert_equal, assert_raises
  import urllib.request
  from urllib.parse import urlparse
  from urllib.error import URLError
label_desc: Use image node_id 7 for calling the TestDataSourceOpen obj's underlying member method code with example usage: obj.test_InvalidFile() without return types