Issue #16826: Revert fix while Windows issues are being worked out.

1 files changed, 8 insertions, 29 deletions

diff --git a/Lib/test/test_importlib/extension/test_case_sensitivity.py b/Lib/test/test_importlib/extension/test_case_sensitivity.py
index e1194db..76c53e4 100644
--- a/Lib/test/test_importlib/extension/test_case_sensitivity.py
+++ b/Lib/test/test_importlib/extension/test_case_sensitivity.py
@@ -5,8 +5,7 @@ import unittest
 from importlib import _bootstrap
 from .. import util
 from . import util as ext_util
-import os
-import subprocess
+
 
 @util.case_insensitive_tests
 class ExtensionModuleCaseSensitivityTest(unittest.TestCase):
@@ -30,34 +29,14 @@ class ExtensionModuleCaseSensitivityTest(unittest.TestCase):
             self.assertIsNone(loader)
 
     def test_case_insensitivity(self):
-        find_snippet = """if True:
-            from importlib import _bootstrap
-            import sys
-            finder = _bootstrap.FileFinder('{path}',
-                                           (_bootstrap.ExtensionFileLoader,
-                                            _bootstrap.EXTENSION_SUFFIXES))
-            loader = finder.find_module('{bad_name}')
-            print(str(hasattr(loader, 'load_module')))
-            """.format(bad_name=ext_util.NAME.upper(), path=ext_util.PATH)
-
-        newenv = os.environ.copy()
-        newenv["PYTHONCASEOK"] = "1"
-
-        def check_output(expected, extra_arg=None):
-            args = [sys.executable]
-            if extra_arg:
-                args.append(extra_arg)
-            args.extend(["-c", find_snippet])
-            p = subprocess.Popen(args, stdout=subprocess.PIPE, env=newenv)
-            actual = p.communicate()[0].decode().strip()
-            self.assertEqual(expected, actual)
-            self.assertEqual(p.wait(), 0)
-
-        # Test with PYTHONCASEOK=1.
-        check_output("True")
+        with support.EnvironmentVarGuard() as env:
+            env.set('PYTHONCASEOK', '1')
+            if b'PYTHONCASEOK' not in _bootstrap._os.environ:
+                self.skipTest('os.environ changes not reflected in '
+                              '_os.environ')
+            loader = self.find_module()
+            self.assertTrue(hasattr(loader, 'load_module'))
 
-        # Test with PYTHONCASEOK=1 ignored because of -E.
-        check_output("False", "-E")