bpo-38994: Implement __class_getitem__ for PathLike (GH-17498)



https://bugs.python.org/issue38994
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index bf40cb1..f44ddba 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -4048,6 +4048,9 @@
         self.assertRaises(ZeroDivisionError, self.fspath,
                           FakePath(ZeroDivisionError()))
 
+    def test_pathlike_class_getitem(self):
+        self.assertIs(os.PathLike[bytes], os.PathLike)
+
 
 class TimesTests(unittest.TestCase):
     def test_times(self):