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[3.12] gh-77749: Fix inconsistent behavior of non-ASCII handling in EmailPolicy.fold() (GH-6986) (GH-114606)

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It now always encodes non-ASCII characters in headers if utf8 is false.

(cherry picked from commit 504334c7be)

Co-authored-by: Rito Takeuchi <licht-t@outlook.jp>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-01-26 17:30:32 +01:00 • committed by GitHub
parent 61f8f58f81
commit fd8aafd64d
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3 changed files with 27 additions and 1 deletions
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17
Lib/test/test_email/test_policy.py
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@ -135,6 +135,23 @@ class PolicyAPITests(unittest.TestCase):
for attr, value in expected.items():
self.assertEqual(getattr(added, attr), value)
def test_fold_utf8(self):
expected_ascii = 'Subject: =?utf-8?q?=C3=A1?=\n'
expected_utf8 = 'Subject: á\n'
msg = email.message.EmailMessage()
s = 'á'
msg['Subject'] = s
p_ascii = email.policy.default.clone()
p_utf8 = email.policy.default.clone(utf8=True)
self.assertEqual(p_ascii.fold('Subject', msg['Subject']), expected_ascii)
self.assertEqual(p_utf8.fold('Subject', msg['Subject']), expected_utf8)
self.assertEqual(p_ascii.fold('Subject', s), expected_ascii)
self.assertEqual(p_utf8.fold('Subject', s), expected_utf8)
def test_fold_zero_max_line_length(self):
expected = 'Subject: =?utf-8?q?=C3=A1?=\n'