[3.10] bpo-43988: Add test.support.check_disallow_instantiation() (GH-25757) (GH-26885)
(cherry picked from commit 4f725261c6cf23d259e8fdc205e12b76ef4d2d31, fbff5387c3e1f3904420fa5a27738c6c5881305b, and 8cec740820fc875117bfa7b6bdb10202ebeb8fd5)
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
Automerge-Triggered-By: GH:vstinner
diff --git a/Lib/test/test_hmac.py b/Lib/test/test_hmac.py
index 964acd0..7cf9973 100644
--- a/Lib/test/test_hmac.py
+++ b/Lib/test/test_hmac.py
@@ -6,7 +6,7 @@
import unittest.mock
import warnings
-from test.support import hashlib_helper
+from test.support import hashlib_helper, check_disallow_instantiation
from _operator import _compare_digest as operator_compare_digest
@@ -439,11 +439,7 @@ def test_withmodule(self):
@unittest.skipUnless(C_HMAC is not None, 'need _hashlib')
def test_internal_types(self):
# internal types like _hashlib.C_HMAC are not constructable
- with self.assertRaisesRegex(
- TypeError, "cannot create '_hashlib.HMAC' instance"
- ):
- C_HMAC()
-
+ check_disallow_instantiation(self, C_HMAC)
with self.assertRaisesRegex(TypeError, "immutable type"):
C_HMAC.value = None