diff options
Diffstat (limited to 'Lib/test/test_email/test_policy.py')
| -rw-r--r-- | Lib/test/test_email/test_policy.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/test/test_email/test_policy.py b/Lib/test/test_email/test_policy.py index 1e39aa062c..e87c275549 100644 --- a/Lib/test/test_email/test_policy.py +++ b/Lib/test/test_email/test_policy.py @@ -2,6 +2,7 @@ import io import types import textwrap import unittest +import email.errors import email.policy import email.parser import email.generator @@ -257,6 +258,25 @@ class PolicyAPITests(unittest.TestCase): 'Subject: \n' + 12 * ' =?utf-8?q?=C4=85?=\n') + def test_short_maxlen_error(self): + # RFC 2047 chrome takes up 7 characters, plus the length of the charset + # name, so folding should fail if maxlen is lower than the minimum + # required length for a line. + + # Note: This is only triggered when there is a single word longer than + # max_line_length, hence the 1234567890 at the end of this whimsical + # subject. This is because when we encounter a word longer than + # max_line_length, it is broken down into encoded words to fit + # max_line_length. If the max_line_length isn't large enough to even + # contain the RFC 2047 chrome (`?=<charset>?q??=`), we fail. + subject = "Melt away the pounds with this one simple trick! 1234567890" + + for maxlen in [3, 7, 9]: + with self.subTest(maxlen=maxlen): + policy = email.policy.default.clone(max_line_length=maxlen) + with self.assertRaises(email.errors.HeaderParseError): + policy.fold("Subject", subject) + # XXX: Need subclassing tests. # For adding subclassed objects, make sure the usual rules apply (subclass # wins), but that the order still works (right overrides left). |