[Python-checkins] bpo-45566: `test_frozen_pickle` checks all `pickle` protocols (GH-29150)
miss-islington
webhook-mailer at python.org
Sun Oct 24 09:06:36 EDT 2021
https://github.com/python/cpython/commit/07236d562e59c6650227be18fa6ffc66b18d4741
commit: 07236d562e59c6650227be18fa6ffc66b18d4741
branch: main
author: Nikita Sobolev <mail at sobolevn.me>
committer: miss-islington <31488909+miss-islington at users.noreply.github.com>
date: 2021-10-24T06:06:32-07:00
summary:
bpo-45566: `test_frozen_pickle` checks all `pickle` protocols (GH-29150)
Refs https://github.com/python/cpython/pull/29147
Automerge-Triggered-By: GH:ericvsmith
files:
A Misc/NEWS.d/next/Tests/2021-10-22-12-05-21.bpo-45566.2gQ3ZB.rst
M Lib/test/test_dataclasses.py
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index bdcb4a2cfd1a0..bbbb8e6c6395b 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -2859,13 +2859,26 @@ class FrozenSlotsClass:
foo: str
bar: int
+ @dataclass(frozen=True)
+ class FrozenWithoutSlotsClass:
+ foo: str
+ bar: int
+
def test_frozen_pickle(self):
# bpo-43999
- assert self.FrozenSlotsClass.__slots__ == ("foo", "bar")
- p = pickle.dumps(self.FrozenSlotsClass("a", 1))
- assert pickle.loads(p) == self.FrozenSlotsClass("a", 1)
-
+ self.assertEqual(self.FrozenSlotsClass.__slots__, ("foo", "bar"))
+ for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+ with self.subTest(proto=proto):
+ obj = self.FrozenSlotsClass("a", 1)
+ p = pickle.loads(pickle.dumps(obj, protocol=proto))
+ self.assertIsNot(obj, p)
+ self.assertEqual(obj, p)
+
+ obj = self.FrozenWithoutSlotsClass("a", 1)
+ p = pickle.loads(pickle.dumps(obj, protocol=proto))
+ self.assertIsNot(obj, p)
+ self.assertEqual(obj, p)
class TestDescriptors(unittest.TestCase):
def test_set_name(self):
diff --git a/Misc/NEWS.d/next/Tests/2021-10-22-12-05-21.bpo-45566.2gQ3ZB.rst b/Misc/NEWS.d/next/Tests/2021-10-22-12-05-21.bpo-45566.2gQ3ZB.rst
new file mode 100644
index 0000000000000..a2ecf721800d9
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2021-10-22-12-05-21.bpo-45566.2gQ3ZB.rst
@@ -0,0 +1 @@
+Fix ``test_frozen_pickle`` in ``test_dataclasses`` to check all ``pickle`` versions.
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