"""

import re

import sys

import urllib # For urllib.parse.unquote

from string import hexdigits

from operator import itemgetter

"""

# max_line_length 0/None means no limit, ie: infinitely long.

maxlen = policy.max_line_length or float("+inf")

maxlen = policy.max_line_length or sys.maxsize

encoding = 'utf-8' if policy.utf8 else 'us-ascii'

lines = ['']

last_ew = None

"""

import re

import sys

from email._policybase import Policy, Compat32, compat32, _extend_docstrings

from email.utils import _has_surrogates

from email.headerregistry import HeaderRegistry as HeaderRegistry

def _fold(self, name, value, refold_binary=False):

if hasattr(value, 'name'):

return value.fold(policy=self)

maxlen = self.max_line_length if self.max_line_length else float('inf')

maxlen = self.max_line_length if self.max_line_length else sys.maxsize

lines = value.splitlines()

refold = (self.refold_source == 'all' or

self.refold_source == 'long' and

import io

import sys

import types

import textwrap

import unittest

for attr, value in expected.items():

self.assertEqual(getattr(added, attr), value)

def test_fold_zero_max_line_length(self):

expected = 'Subject: =?utf-8?q?=C3=A1?=\n'

msg = email.message.EmailMessage()

msg['Subject'] = 'á'

p1 = email.policy.default.clone(max_line_length=0)

p2 = email.policy.default.clone(max_line_length=None)

self.assertEqual(p1.fold('Subject', msg['Subject']), expected)

self.assertEqual(p2.fold('Subject', msg['Subject']), expected)

def test_register_defect(self):

class Dummy:

def __init__(self):

Fix the folding of email header when the max_line_length is 0 or None and the

header contains non-ascii characters. Contributed by Licht Takeuchi

(@Licht-T).