class_docstr: Tests for PathFinder.
class_docstr_tok: ["Tests","for","PathFinder","."]
code: def test_failure(self):
      # Test None returned upon not finding a suitable loader.
      module = "<test module>"
      with util.import_state():
          self.assertIsNone(self.find(module))
  
imports: from test.test_importlib import util
  import os
  import sys
  import tempfile
  from types import ModuleType
  import unittest
  import warnings
  import zipimport
label_desc: Use image node_id 1 for calling the FinderTests obj's underlying member method code with example usage: obj.test_failure() without return types