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[3.10] bpo-43988: Add test.support.check_disallow_instantiation() (GH-25757) (GH-26885)

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(cherry picked from commit 4f725261c6, fbff5387c3, and 8cec740820)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>

Automerge-Triggered-By: GH:vstinner
This commit is contained in:
Erlend Egeberg Aasland 2021-06-24 01:46:25 +02:00 • committed by GitHub
parent ece3841d3d
commit 0a3452e7cf
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16 changed files with 58 additions and 53 deletions
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8
Lib/test/test_hmac.py
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@ -6,7 +6,7 @@ import unittest
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 @@ class ConstructorTestCase(unittest.TestCase):
@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