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gh-136285: Improve pickle protocol testing in test_interpreters #136286

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Merged
merged 4 commits into from
Jul 6, 2025
Merged

gh-136285: Improve pickle protocol testing in test_interpreters #136286

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080e554
gh-136285: Improve `pickle` protocol testing in `test_interpreters`
sobolevn Jul 4, 2025
8b6fbde
Fix pickling bug
sobolevn Jul 5, 2025
b9f6ce6
Add NEWS
sobolevn Jul 5, 2025
19daa81
Address review
sobolevn Jul 6, 2025
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8 changes: 5 additions & 3 deletions Lib/test/test_interpreters/test_api.py
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Original file line number Diff line number Diff line change
Expand Up @@ -412,9 +412,11 @@ def test_equality(self):

def test_pickle(self):
interp = interpreters.create()
data = pickle.dumps(interp)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, interp)
for protocol in range(2, pickle.HIGHEST_PROTOCOL + 1):
with self.subTest(protocol=protocol):
data = pickle.dumps(interp, protocol)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, interp)


class TestInterpreterIsRunning(TestBase):
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16 changes: 10 additions & 6 deletions Lib/test/test_interpreters/test_channels.py
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Original file line number Diff line number Diff line change
Expand Up @@ -121,9 +121,11 @@ def test_equality(self):

def test_pickle(self):
ch, _ = channels.create()
data = pickle.dumps(ch)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, ch)
for protocol in range(2, pickle.HIGHEST_PROTOCOL + 1):
with self.subTest(protocol=protocol):
data = pickle.dumps(ch, protocol)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, ch)


class TestSendChannelAttrs(TestBase):
Expand Down Expand Up @@ -152,9 +154,11 @@ def test_equality(self):

def test_pickle(self):
_, ch = channels.create()
data = pickle.dumps(ch)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, ch)
for protocol in range(2, pickle.HIGHEST_PROTOCOL + 1):
with self.subTest(protocol=protocol):
data = pickle.dumps(ch, protocol)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, ch)


class TestSendRecv(TestBase):
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8 changes: 5 additions & 3 deletions Lib/test/test_interpreters/test_queues.py
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Expand Up @@ -188,9 +188,11 @@ def test_equality(self):

def test_pickle(self):
queue = queues.create()
data = pickle.dumps(queue)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, queue)
for protocol in range(2, pickle.HIGHEST_PROTOCOL + 1):
with self.subTest(protocol=protocol):
data = pickle.dumps(queue, protocol)
unpickled = pickle.loads(data)
self.assertEqual(unpickled, queue)


class TestQueueOps(TestBase):
Expand Down
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