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bpo-32775: Fix regular expression warnings in fnmatch. (#5583)

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fnmatch.translate() no longer produces patterns which contain set
operations.

Sets starting with '[' or containing '--', '&&', '~~' or '||' will
be interpreted differently in regular expressions in future versions.
Currently they emit warnings. fnmatch.translate() now avoids producing
patterns containing such sets by accident.
This commit is contained in:
Serhiy Storchaka 2018-02-09 13:30:19 +02:00 • committed by GitHub
parent feaefc7f60
commit 23cdbfa744
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3 changed files with 38 additions and 2 deletions
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12
Lib/test/test_fnmatch.py
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@ -2,6 +2,7 @@
import unittest
import os
import warnings
from fnmatch import fnmatch, fnmatchcase, translate, filter
@ -83,6 +84,17 @@ class FnmatchTestCase(unittest.TestCase):
check('usr/bin', 'usr\\bin', normsep)
check('usr\\bin', 'usr\\bin')
def test_warnings(self):
with warnings.catch_warnings():
warnings.simplefilter('error', Warning)
check = self.check_match
check('[', '[[]')
check('&', '[a&&b]')
check('|', '[a||b]')
check('~', '[a~~b]')
check(',', '[a-z+--A-Z]')
check('.', '[a-z--/A-Z]')
class TranslateTestCase(unittest.TestCase):