Issue #13415: os.unsetenv() doesn't ignore errors anymore.
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index efa28ea..d06f08e 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -423,6 +423,15 @@
value_str = value.decode(sys.getfilesystemencoding(), 'surrogateescape')
self.assertEqual(os.environ['bytes'], value_str)
+ def test_unset_error(self):
+ if sys.platform == "win32":
+ # an environment variable is limited to 32,767 characters
+ key = 'x' * 50000
+ else:
+ # "=" is not allowed in a variable name
+ key = 'key='
+ self.assertRaises(OSError, os.environ.__delitem__, key)
+
class WalkTests(unittest.TestCase):
"""Tests for os.walk()."""