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bpo-40330: Fix utf-8 size check in ShareableList (GH-19606)

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The item size must be checked after encoding to bytes, not before.

Automerge-Triggered-By: @pitrou
This commit is contained in:
Antoine Pitrou 2020-04-20 20:54:55 +02:00 • committed by GitHub
parent 5dd21f5d1c
commit eba9f6155d
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3 changed files with 22 additions and 6 deletions
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16
Lib/test/_test_multiprocessing.py
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@ -3995,9 +3995,21 @@ class _TestSharedMemory(BaseTestCase):
sl[4] = 'some' # Change type at a given position.
self.assertEqual(sl[4], 'some')
self.assertEqual(sl.format, '8s8sdq8sxxxxxxx?q')
with self.assertRaises(ValueError):
sl[4] = 'far too many' # Exceeds available storage.
with self.assertRaisesRegex(ValueError,
"exceeds available storage"):
sl[4] = 'far too many'
self.assertEqual(sl[4], 'some')
sl[0] = 'encodés' # Exactly 8 bytes of UTF-8 data
self.assertEqual(sl[0], 'encodés')
self.assertEqual(sl[1], b'HoWdY') # no spillage
with self.assertRaisesRegex(ValueError,
"exceeds available storage"):
sl[0] = 'encodées' # Exactly 9 bytes of UTF-8 data
self.assertEqual(sl[1], b'HoWdY')
with self.assertRaisesRegex(ValueError,
"exceeds available storage"):
sl[1] = b'123456789'
self.assertEqual(sl[1], b'HoWdY')
# Exercise count().
with warnings.catch_warnings():