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bpo-30349: Raise FutureWarning for nested sets and set operations (#1553)

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in regular expressions.
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Serhiy Storchaka 2017-11-16 12:38:26 +02:00 • committed by GitHub
parent 3daaafb700
commit 05cb728d68
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8 changed files with 106 additions and 9 deletions
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47
Lib/test/test_re.py
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@ -914,6 +914,51 @@ class ReTests(unittest.TestCase):
self.assertEqual(re.search(r"\s([^a])", " b").group(1), "b")
self.assertEqual(re.search(r"\s([^a]*)", " bb").group(1), "bb")
def test_possible_set_operations(self):
s = bytes(range(128)).decode()
with self.assertWarns(FutureWarning):
p = re.compile(r'[0-9--1]')
self.assertEqual(p.findall(s), list('-./0123456789'))
self.assertEqual(re.findall(r'[--1]', s), list('-./01'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[%--1]')
self.assertEqual(p.findall(s), list("%&'()*+,-1"))
with self.assertWarns(FutureWarning):
p = re.compile(r'[%--]')
self.assertEqual(p.findall(s), list("%&'()*+,-"))
with self.assertWarns(FutureWarning):
p = re.compile(r'[0-9&&1]')
self.assertEqual(p.findall(s), list('&0123456789'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[\d&&1]')
self.assertEqual(p.findall(s), list('&0123456789'))
self.assertEqual(re.findall(r'[&&1]', s), list('&1'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[0-9||a]')
self.assertEqual(p.findall(s), list('0123456789a|'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[\d||a]')
self.assertEqual(p.findall(s), list('0123456789a|'))
self.assertEqual(re.findall(r'[||1]', s), list('1|'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[0-9~~1]')
self.assertEqual(p.findall(s), list('0123456789~'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[\d~~1]')
self.assertEqual(p.findall(s), list('0123456789~'))
self.assertEqual(re.findall(r'[~~1]', s), list('1~'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[[0-9]|]')
self.assertEqual(p.findall(s), list('0123456789[]'))
with self.assertWarns(FutureWarning):
p = re.compile(r'[[:digit:]|]')
self.assertEqual(p.findall(s), list(':[]dgit'))
def test_search_coverage(self):
self.assertEqual(re.search(r"\s(b)", " b").group(1), "b")
self.assertEqual(re.search(r"a\s", "a ").group(0), "a ")
@ -932,7 +977,7 @@ class ReTests(unittest.TestCase):
self.assertEqual(m.group(), match)
self.assertEqual(m.span(), span)
LITERAL_CHARS = string.ascii_letters + string.digits + '!"%&\',/:;<=>@_`~'
LITERAL_CHARS = string.ascii_letters + string.digits + '!"%\',/:;<=>@_`'
def test_re_escape(self):
p = ''.join(chr(i) for i in range(256))