| from test.support import verbose, run_unittest, gc_collect, bigmemtest, _2G, \ |
| cpython_only, captured_stdout |
| import io |
| import locale |
| import re |
| from re import Scanner |
| import sre_compile |
| import sre_constants |
| import sys |
| import string |
| import traceback |
| import unittest |
| from weakref import proxy |
| |
| # Misc tests from Tim Peters' re.doc |
| |
| # WARNING: Don't change details in these tests if you don't know |
| # what you're doing. Some of these tests were carefully modeled to |
| # cover most of the code. |
| |
| class S(str): |
| def __getitem__(self, index): |
| return S(super().__getitem__(index)) |
| |
| class B(bytes): |
| def __getitem__(self, index): |
| return B(super().__getitem__(index)) |
| |
| class ReTests(unittest.TestCase): |
| |
| def assertTypedEqual(self, actual, expect, msg=None): |
| self.assertEqual(actual, expect, msg) |
| def recurse(actual, expect): |
| if isinstance(expect, (tuple, list)): |
| for x, y in zip(actual, expect): |
| recurse(x, y) |
| else: |
| self.assertIs(type(actual), type(expect), msg) |
| recurse(actual, expect) |
| |
| def test_keep_buffer(self): |
| # See bug 14212 |
| b = bytearray(b'x') |
| it = re.finditer(b'a', b) |
| with self.assertRaises(BufferError): |
| b.extend(b'x'*400) |
| list(it) |
| del it |
| gc_collect() |
| b.extend(b'x'*400) |
| |
| def test_weakref(self): |
| s = 'QabbbcR' |
| x = re.compile('ab+c') |
| y = proxy(x) |
| self.assertEqual(x.findall('QabbbcR'), y.findall('QabbbcR')) |
| |
| def test_search_star_plus(self): |
| self.assertEqual(re.search('x*', 'axx').span(0), (0, 0)) |
| self.assertEqual(re.search('x*', 'axx').span(), (0, 0)) |
| self.assertEqual(re.search('x+', 'axx').span(0), (1, 3)) |
| self.assertEqual(re.search('x+', 'axx').span(), (1, 3)) |
| self.assertIsNone(re.search('x', 'aaa')) |
| self.assertEqual(re.match('a*', 'xxx').span(0), (0, 0)) |
| self.assertEqual(re.match('a*', 'xxx').span(), (0, 0)) |
| self.assertEqual(re.match('x*', 'xxxa').span(0), (0, 3)) |
| self.assertEqual(re.match('x*', 'xxxa').span(), (0, 3)) |
| self.assertIsNone(re.match('a+', 'xxx')) |
| |
| def bump_num(self, matchobj): |
| int_value = int(matchobj.group(0)) |
| return str(int_value + 1) |
| |
| def test_basic_re_sub(self): |
| self.assertTypedEqual(re.sub('y', 'a', 'xyz'), 'xaz') |
| self.assertTypedEqual(re.sub('y', S('a'), S('xyz')), 'xaz') |
| self.assertTypedEqual(re.sub(b'y', b'a', b'xyz'), b'xaz') |
| self.assertTypedEqual(re.sub(b'y', B(b'a'), B(b'xyz')), b'xaz') |
| self.assertTypedEqual(re.sub(b'y', bytearray(b'a'), bytearray(b'xyz')), b'xaz') |
| self.assertTypedEqual(re.sub(b'y', memoryview(b'a'), memoryview(b'xyz')), b'xaz') |
| for y in ("\xe0", "\u0430", "\U0001d49c"): |
| self.assertEqual(re.sub(y, 'a', 'x%sz' % y), 'xaz') |
| |
| self.assertEqual(re.sub("(?i)b+", "x", "bbbb BBBB"), 'x x') |
| self.assertEqual(re.sub(r'\d+', self.bump_num, '08.2 -2 23x99y'), |
| '9.3 -3 24x100y') |
| self.assertEqual(re.sub(r'\d+', self.bump_num, '08.2 -2 23x99y', count=3), |
| '9.3 -3 23x99y') |
| |
| self.assertEqual(re.sub('.', lambda m: r"\n", 'x'), '\\n') |
| self.assertEqual(re.sub('.', r"\n", 'x'), '\n') |
| |
| s = r"\1\1" |
| self.assertEqual(re.sub('(.)', s, 'x'), 'xx') |
| self.assertEqual(re.sub('(.)', re.escape(s), 'x'), s) |
| self.assertEqual(re.sub('(.)', lambda m: s, 'x'), s) |
| |
| self.assertEqual(re.sub('(?P<a>x)', '\g<a>\g<a>', 'xx'), 'xxxx') |
| self.assertEqual(re.sub('(?P<a>x)', '\g<a>\g<1>', 'xx'), 'xxxx') |
| self.assertEqual(re.sub('(?P<unk>x)', '\g<unk>\g<unk>', 'xx'), 'xxxx') |
| self.assertEqual(re.sub('(?P<unk>x)', '\g<1>\g<1>', 'xx'), 'xxxx') |
| |
| self.assertEqual(re.sub('a',r'\t\n\v\r\f\a\b\B\Z\a\A\w\W\s\S\d\D','a'), |
| '\t\n\v\r\f\a\b\\B\\Z\a\\A\\w\\W\\s\\S\\d\\D') |
| self.assertEqual(re.sub('a', '\t\n\v\r\f\a', 'a'), '\t\n\v\r\f\a') |
| self.assertEqual(re.sub('a', '\t\n\v\r\f\a', 'a'), |
| (chr(9)+chr(10)+chr(11)+chr(13)+chr(12)+chr(7))) |
| |
| self.assertEqual(re.sub('^\s*', 'X', 'test'), 'Xtest') |
| |
| def test_bug_449964(self): |
| # fails for group followed by other escape |
| self.assertEqual(re.sub(r'(?P<unk>x)', '\g<1>\g<1>\\b', 'xx'), |
| 'xx\bxx\b') |
| |
| def test_bug_449000(self): |
| # Test for sub() on escaped characters |
| self.assertEqual(re.sub(r'\r\n', r'\n', 'abc\r\ndef\r\n'), |
| 'abc\ndef\n') |
| self.assertEqual(re.sub('\r\n', r'\n', 'abc\r\ndef\r\n'), |
| 'abc\ndef\n') |
| self.assertEqual(re.sub(r'\r\n', '\n', 'abc\r\ndef\r\n'), |
| 'abc\ndef\n') |
| self.assertEqual(re.sub('\r\n', '\n', 'abc\r\ndef\r\n'), |
| 'abc\ndef\n') |
| |
| def test_bug_1661(self): |
| # Verify that flags do not get silently ignored with compiled patterns |
| pattern = re.compile('.') |
| self.assertRaises(ValueError, re.match, pattern, 'A', re.I) |
| self.assertRaises(ValueError, re.search, pattern, 'A', re.I) |
| self.assertRaises(ValueError, re.findall, pattern, 'A', re.I) |
| self.assertRaises(ValueError, re.compile, pattern, re.I) |
| |
| def test_bug_3629(self): |
| # A regex that triggered a bug in the sre-code validator |
| re.compile("(?P<quote>)(?(quote))") |
| |
| def test_sub_template_numeric_escape(self): |
| # bug 776311 and friends |
| self.assertEqual(re.sub('x', r'\0', 'x'), '\0') |
| self.assertEqual(re.sub('x', r'\000', 'x'), '\000') |
| self.assertEqual(re.sub('x', r'\001', 'x'), '\001') |
| self.assertEqual(re.sub('x', r'\008', 'x'), '\0' + '8') |
| self.assertEqual(re.sub('x', r'\009', 'x'), '\0' + '9') |
| self.assertEqual(re.sub('x', r'\111', 'x'), '\111') |
| self.assertEqual(re.sub('x', r'\117', 'x'), '\117') |
| |
| self.assertEqual(re.sub('x', r'\1111', 'x'), '\1111') |
| self.assertEqual(re.sub('x', r'\1111', 'x'), '\111' + '1') |
| |
| self.assertEqual(re.sub('x', r'\00', 'x'), '\x00') |
| self.assertEqual(re.sub('x', r'\07', 'x'), '\x07') |
| self.assertEqual(re.sub('x', r'\08', 'x'), '\0' + '8') |
| self.assertEqual(re.sub('x', r'\09', 'x'), '\0' + '9') |
| self.assertEqual(re.sub('x', r'\0a', 'x'), '\0' + 'a') |
| |
| self.assertRaises(re.error, re.sub, 'x', r'\400', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\777', 'x') |
| |
| self.assertRaises(re.error, re.sub, 'x', r'\1', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\8', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\9', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\11', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\18', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\1a', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\90', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\99', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\118', 'x') # r'\11' + '8' |
| self.assertRaises(re.error, re.sub, 'x', r'\11a', 'x') |
| self.assertRaises(re.error, re.sub, 'x', r'\181', 'x') # r'\18' + '1' |
| self.assertRaises(re.error, re.sub, 'x', r'\800', 'x') # r'\80' + '0' |
| |
| # in python2.3 (etc), these loop endlessly in sre_parser.py |
| self.assertEqual(re.sub('(((((((((((x)))))))))))', r'\11', 'x'), 'x') |
| self.assertEqual(re.sub('((((((((((y))))))))))(.)', r'\118', 'xyz'), |
| 'xz8') |
| self.assertEqual(re.sub('((((((((((y))))))))))(.)', r'\11a', 'xyz'), |
| 'xza') |
| |
| def test_qualified_re_sub(self): |
| self.assertEqual(re.sub('a', 'b', 'aaaaa'), 'bbbbb') |
| self.assertEqual(re.sub('a', 'b', 'aaaaa', count=1), 'baaaa') |
| |
| def test_bug_114660(self): |
| self.assertEqual(re.sub(r'(\S)\s+(\S)', r'\1 \2', 'hello there'), |
| 'hello there') |
| |
| def test_bug_462270(self): |
| # Test for empty sub() behaviour, see SF bug #462270 |
| self.assertEqual(re.sub('x*', '-', 'abxd'), '-a-b-d-') |
| self.assertEqual(re.sub('x+', '-', 'abxd'), 'ab-d') |
| |
| def test_symbolic_groups(self): |
| re.compile('(?P<a>x)(?P=a)(?(a)y)') |
| re.compile('(?P<a1>x)(?P=a1)(?(a1)y)') |
| re.compile('(?P<a1>x)\1(?(1)y)') |
| self.assertRaises(re.error, re.compile, '(?P<a>)(?P<a>)') |
| self.assertRaises(re.error, re.compile, '(?Px)') |
| self.assertRaises(re.error, re.compile, '(?P=)') |
| self.assertRaises(re.error, re.compile, '(?P=1)') |
| self.assertRaises(re.error, re.compile, '(?P=a)') |
| self.assertRaises(re.error, re.compile, '(?P=a1)') |
| self.assertRaises(re.error, re.compile, '(?P=a.)') |
| self.assertRaises(re.error, re.compile, '(?P<)') |
| self.assertRaises(re.error, re.compile, '(?P<>)') |
| self.assertRaises(re.error, re.compile, '(?P<1>)') |
| self.assertRaises(re.error, re.compile, '(?P<a.>)') |
| self.assertRaises(re.error, re.compile, '(?())') |
| self.assertRaises(re.error, re.compile, '(?(a))') |
| self.assertRaises(re.error, re.compile, '(?(1a))') |
| self.assertRaises(re.error, re.compile, '(?(a.))') |
| # New valid/invalid identifiers in Python 3 |
| re.compile('(?P<µ>x)(?P=µ)(?(µ)y)') |
| re.compile('(?P<𝔘𝔫𝔦𝔠𝔬𝔡𝔢>x)(?P=𝔘𝔫𝔦𝔠𝔬𝔡𝔢)(?(𝔘𝔫𝔦𝔠𝔬𝔡𝔢)y)') |
| self.assertRaises(re.error, re.compile, '(?P<©>x)') |
| # Support > 100 groups. |
| pat = '|'.join('x(?P<a%d>%x)y' % (i, i) for i in range(1, 200 + 1)) |
| pat = '(?:%s)(?(200)z|t)' % pat |
| self.assertEqual(re.match(pat, 'xc8yz').span(), (0, 5)) |
| |
| def test_symbolic_refs(self): |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<a', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<a a>', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<>', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<1a1>', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', r'\g<2>', 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', r'\2', 'xx') |
| self.assertRaises(IndexError, re.sub, '(?P<a>x)', '\g<ab>', 'xx') |
| self.assertEqual(re.sub('(?P<a>x)|(?P<b>y)', r'\g<b>', 'xx'), '') |
| self.assertEqual(re.sub('(?P<a>x)|(?P<b>y)', r'\2', 'xx'), '') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', '\g<-1>', 'xx') |
| # New valid/invalid identifiers in Python 3 |
| self.assertEqual(re.sub('(?P<µ>x)', r'\g<µ>', 'xx'), 'xx') |
| self.assertEqual(re.sub('(?P<𝔘𝔫𝔦𝔠𝔬𝔡𝔢>x)', r'\g<𝔘𝔫𝔦𝔠𝔬𝔡𝔢>', 'xx'), 'xx') |
| self.assertRaises(re.error, re.sub, '(?P<a>x)', r'\g<©>', 'xx') |
| # Support > 100 groups. |
| pat = '|'.join('x(?P<a%d>%x)y' % (i, i) for i in range(1, 200 + 1)) |
| self.assertEqual(re.sub(pat, '\g<200>', 'xc8yzxc8y'), 'c8zc8') |
| |
| def test_re_subn(self): |
| self.assertEqual(re.subn("(?i)b+", "x", "bbbb BBBB"), ('x x', 2)) |
| self.assertEqual(re.subn("b+", "x", "bbbb BBBB"), ('x BBBB', 1)) |
| self.assertEqual(re.subn("b+", "x", "xyz"), ('xyz', 0)) |
| self.assertEqual(re.subn("b*", "x", "xyz"), ('xxxyxzx', 4)) |
| self.assertEqual(re.subn("b*", "x", "xyz", count=2), ('xxxyz', 2)) |
| |
| def test_re_split(self): |
| for string in ":a:b::c", S(":a:b::c"): |
| self.assertTypedEqual(re.split(":", string), |
| ['', 'a', 'b', '', 'c']) |
| self.assertTypedEqual(re.split(":+", string), |
| ['', 'a', 'b', 'c']) |
| self.assertTypedEqual(re.split("(:+)", string), |
| ['', ':', 'a', ':', 'b', '::', 'c']) |
| for string in (b":a:b::c", B(b":a:b::c"), bytearray(b":a:b::c"), |
| memoryview(b":a:b::c")): |
| self.assertTypedEqual(re.split(b":", string), |
| [b'', b'a', b'b', b'', b'c']) |
| self.assertTypedEqual(re.split(b":+", string), |
| [b'', b'a', b'b', b'c']) |
| self.assertTypedEqual(re.split(b"(:+)", string), |
| [b'', b':', b'a', b':', b'b', b'::', b'c']) |
| for a, b, c in ("\xe0\xdf\xe7", "\u0430\u0431\u0432", |
| "\U0001d49c\U0001d49e\U0001d4b5"): |
| string = ":%s:%s::%s" % (a, b, c) |
| self.assertEqual(re.split(":", string), ['', a, b, '', c]) |
| self.assertEqual(re.split(":+", string), ['', a, b, c]) |
| self.assertEqual(re.split("(:+)", string), |
| ['', ':', a, ':', b, '::', c]) |
| |
| self.assertEqual(re.split("(?::+)", ":a:b::c"), ['', 'a', 'b', 'c']) |
| self.assertEqual(re.split("(:)+", ":a:b::c"), |
| ['', ':', 'a', ':', 'b', ':', 'c']) |
| self.assertEqual(re.split("([b:]+)", ":a:b::c"), |
| ['', ':', 'a', ':b::', 'c']) |
| self.assertEqual(re.split("(b)|(:+)", ":a:b::c"), |
| ['', None, ':', 'a', None, ':', '', 'b', None, '', |
| None, '::', 'c']) |
| self.assertEqual(re.split("(?:b)|(?::+)", ":a:b::c"), |
| ['', 'a', '', '', 'c']) |
| |
| for sep, expected in [ |
| (':*', ['', 'a', 'b', 'c']), |
| ('(?::*)', ['', 'a', 'b', 'c']), |
| ('(:*)', ['', ':', 'a', ':', 'b', '::', 'c']), |
| ('(:)*', ['', ':', 'a', ':', 'b', ':', 'c']), |
| ]: |
| with self.subTest(sep=sep), self.assertWarns(FutureWarning): |
| self.assertTypedEqual(re.split(sep, ':a:b::c'), expected) |
| |
| for sep, expected in [ |
| ('', [':a:b::c']), |
| (r'\b', [':a:b::c']), |
| (r'(?=:)', [':a:b::c']), |
| (r'(?<=:)', [':a:b::c']), |
| ]: |
| with self.subTest(sep=sep), self.assertRaises(ValueError): |
| self.assertTypedEqual(re.split(sep, ':a:b::c'), expected) |
| |
| def test_qualified_re_split(self): |
| self.assertEqual(re.split(":", ":a:b::c", maxsplit=2), ['', 'a', 'b::c']) |
| self.assertEqual(re.split(':', 'a:b:c:d', maxsplit=2), ['a', 'b', 'c:d']) |
| self.assertEqual(re.split("(:)", ":a:b::c", maxsplit=2), |
| ['', ':', 'a', ':', 'b::c']) |
| self.assertEqual(re.split("(:+)", ":a:b::c", maxsplit=2), |
| ['', ':', 'a', ':', 'b::c']) |
| with self.assertWarns(FutureWarning): |
| self.assertEqual(re.split("(:*)", ":a:b::c", maxsplit=2), |
| ['', ':', 'a', ':', 'b::c']) |
| |
| def test_re_findall(self): |
| self.assertEqual(re.findall(":+", "abc"), []) |
| for string in "a:b::c:::d", S("a:b::c:::d"): |
| self.assertTypedEqual(re.findall(":+", string), |
| [":", "::", ":::"]) |
| self.assertTypedEqual(re.findall("(:+)", string), |
| [":", "::", ":::"]) |
| self.assertTypedEqual(re.findall("(:)(:*)", string), |
| [(":", ""), (":", ":"), (":", "::")]) |
| for string in (b"a:b::c:::d", B(b"a:b::c:::d"), bytearray(b"a:b::c:::d"), |
| memoryview(b"a:b::c:::d")): |
| self.assertTypedEqual(re.findall(b":+", string), |
| [b":", b"::", b":::"]) |
| self.assertTypedEqual(re.findall(b"(:+)", string), |
| [b":", b"::", b":::"]) |
| self.assertTypedEqual(re.findall(b"(:)(:*)", string), |
| [(b":", b""), (b":", b":"), (b":", b"::")]) |
| for x in ("\xe0", "\u0430", "\U0001d49c"): |
| xx = x * 2 |
| xxx = x * 3 |
| string = "a%sb%sc%sd" % (x, xx, xxx) |
| self.assertEqual(re.findall("%s+" % x, string), [x, xx, xxx]) |
| self.assertEqual(re.findall("(%s+)" % x, string), [x, xx, xxx]) |
| self.assertEqual(re.findall("(%s)(%s*)" % (x, x), string), |
| [(x, ""), (x, x), (x, xx)]) |
| |
| def test_bug_117612(self): |
| self.assertEqual(re.findall(r"(a|(b))", "aba"), |
| [("a", ""),("b", "b"),("a", "")]) |
| |
| def test_re_match(self): |
| for string in 'a', S('a'): |
| self.assertEqual(re.match('a', string).groups(), ()) |
| self.assertEqual(re.match('(a)', string).groups(), ('a',)) |
| self.assertEqual(re.match('(a)', string).group(0), 'a') |
| self.assertEqual(re.match('(a)', string).group(1), 'a') |
| self.assertEqual(re.match('(a)', string).group(1, 1), ('a', 'a')) |
| for string in b'a', B(b'a'), bytearray(b'a'), memoryview(b'a'): |
| self.assertEqual(re.match(b'a', string).groups(), ()) |
| self.assertEqual(re.match(b'(a)', string).groups(), (b'a',)) |
| self.assertEqual(re.match(b'(a)', string).group(0), b'a') |
| self.assertEqual(re.match(b'(a)', string).group(1), b'a') |
| self.assertEqual(re.match(b'(a)', string).group(1, 1), (b'a', b'a')) |
| for a in ("\xe0", "\u0430", "\U0001d49c"): |
| self.assertEqual(re.match(a, a).groups(), ()) |
| self.assertEqual(re.match('(%s)' % a, a).groups(), (a,)) |
| self.assertEqual(re.match('(%s)' % a, a).group(0), a) |
| self.assertEqual(re.match('(%s)' % a, a).group(1), a) |
| self.assertEqual(re.match('(%s)' % a, a).group(1, 1), (a, a)) |
| |
| pat = re.compile('((a)|(b))(c)?') |
| self.assertEqual(pat.match('a').groups(), ('a', 'a', None, None)) |
| self.assertEqual(pat.match('b').groups(), ('b', None, 'b', None)) |
| self.assertEqual(pat.match('ac').groups(), ('a', 'a', None, 'c')) |
| self.assertEqual(pat.match('bc').groups(), ('b', None, 'b', 'c')) |
| self.assertEqual(pat.match('bc').groups(""), ('b', "", 'b', 'c')) |
| |
| # A single group |
| m = re.match('(a)', 'a') |
| self.assertEqual(m.group(0), 'a') |
| self.assertEqual(m.group(0), 'a') |
| self.assertEqual(m.group(1), 'a') |
| self.assertEqual(m.group(1, 1), ('a', 'a')) |
| |
| pat = re.compile('(?:(?P<a1>a)|(?P<b2>b))(?P<c3>c)?') |
| self.assertEqual(pat.match('a').group(1, 2, 3), ('a', None, None)) |
| self.assertEqual(pat.match('b').group('a1', 'b2', 'c3'), |
| (None, 'b', None)) |
| self.assertEqual(pat.match('ac').group(1, 'b2', 3), ('a', None, 'c')) |
| |
| def test_re_fullmatch(self): |
| # Issue 16203: Proposal: add re.fullmatch() method. |
| self.assertEqual(re.fullmatch(r"a", "a").span(), (0, 1)) |
| for string in "ab", S("ab"): |
| self.assertEqual(re.fullmatch(r"a|ab", string).span(), (0, 2)) |
| for string in b"ab", B(b"ab"), bytearray(b"ab"), memoryview(b"ab"): |
| self.assertEqual(re.fullmatch(br"a|ab", string).span(), (0, 2)) |
| for a, b in "\xe0\xdf", "\u0430\u0431", "\U0001d49c\U0001d49e": |
| r = r"%s|%s" % (a, a + b) |
| self.assertEqual(re.fullmatch(r, a + b).span(), (0, 2)) |
| self.assertEqual(re.fullmatch(r".*?$", "abc").span(), (0, 3)) |
| self.assertEqual(re.fullmatch(r".*?", "abc").span(), (0, 3)) |
| self.assertEqual(re.fullmatch(r"a.*?b", "ab").span(), (0, 2)) |
| self.assertEqual(re.fullmatch(r"a.*?b", "abb").span(), (0, 3)) |
| self.assertEqual(re.fullmatch(r"a.*?b", "axxb").span(), (0, 4)) |
| self.assertIsNone(re.fullmatch(r"a+", "ab")) |
| self.assertIsNone(re.fullmatch(r"abc$", "abc\n")) |
| self.assertIsNone(re.fullmatch(r"abc\Z", "abc\n")) |
| self.assertIsNone(re.fullmatch(r"(?m)abc$", "abc\n")) |
| self.assertEqual(re.fullmatch(r"ab(?=c)cd", "abcd").span(), (0, 4)) |
| self.assertEqual(re.fullmatch(r"ab(?<=b)cd", "abcd").span(), (0, 4)) |
| self.assertEqual(re.fullmatch(r"(?=a|ab)ab", "ab").span(), (0, 2)) |
| |
| self.assertEqual( |
| re.compile(r"bc").fullmatch("abcd", pos=1, endpos=3).span(), (1, 3)) |
| self.assertEqual( |
| re.compile(r".*?$").fullmatch("abcd", pos=1, endpos=3).span(), (1, 3)) |
| self.assertEqual( |
| re.compile(r".*?").fullmatch("abcd", pos=1, endpos=3).span(), (1, 3)) |
| |
| def test_re_groupref_exists(self): |
| self.assertEqual(re.match('^(\()?([^()]+)(?(1)\))$', '(a)').groups(), |
| ('(', 'a')) |
| self.assertEqual(re.match('^(\()?([^()]+)(?(1)\))$', 'a').groups(), |
| (None, 'a')) |
| self.assertIsNone(re.match('^(\()?([^()]+)(?(1)\))$', 'a)')) |
| self.assertIsNone(re.match('^(\()?([^()]+)(?(1)\))$', '(a')) |
| self.assertEqual(re.match('^(?:(a)|c)((?(1)b|d))$', 'ab').groups(), |
| ('a', 'b')) |
| self.assertEqual(re.match('^(?:(a)|c)((?(1)b|d))$', 'cd').groups(), |
| (None, 'd')) |
| self.assertEqual(re.match('^(?:(a)|c)((?(1)|d))$', 'cd').groups(), |
| (None, 'd')) |
| self.assertEqual(re.match('^(?:(a)|c)((?(1)|d))$', 'a').groups(), |
| ('a', '')) |
| |
| # Tests for bug #1177831: exercise groups other than the first group |
| p = re.compile('(?P<g1>a)(?P<g2>b)?((?(g2)c|d))') |
| self.assertEqual(p.match('abc').groups(), |
| ('a', 'b', 'c')) |
| self.assertEqual(p.match('ad').groups(), |
| ('a', None, 'd')) |
| self.assertIsNone(p.match('abd')) |
| self.assertIsNone(p.match('ac')) |
| |
| # Support > 100 groups. |
| pat = '|'.join('x(?P<a%d>%x)y' % (i, i) for i in range(1, 200 + 1)) |
| pat = '(?:%s)(?(200)z)' % pat |
| self.assertEqual(re.match(pat, 'xc8yz').span(), (0, 5)) |
| |
| def test_re_groupref(self): |
| self.assertEqual(re.match(r'^(\|)?([^()]+)\1$', '|a|').groups(), |
| ('|', 'a')) |
| self.assertEqual(re.match(r'^(\|)?([^()]+)\1?$', 'a').groups(), |
| (None, 'a')) |
| self.assertIsNone(re.match(r'^(\|)?([^()]+)\1$', 'a|')) |
| self.assertIsNone(re.match(r'^(\|)?([^()]+)\1$', '|a')) |
| self.assertEqual(re.match(r'^(?:(a)|c)(\1)$', 'aa').groups(), |
| ('a', 'a')) |
| self.assertEqual(re.match(r'^(?:(a)|c)(\1)?$', 'c').groups(), |
| (None, None)) |
| |
| def test_groupdict(self): |
| self.assertEqual(re.match('(?P<first>first) (?P<second>second)', |
| 'first second').groupdict(), |
| {'first':'first', 'second':'second'}) |
| |
| def test_expand(self): |
| self.assertEqual(re.match("(?P<first>first) (?P<second>second)", |
| "first second") |
| .expand(r"\2 \1 \g<second> \g<first>"), |
| "second first second first") |
| self.assertEqual(re.match("(?P<first>first)|(?P<second>second)", |
| "first") |
| .expand(r"\2 \g<second>"), |
| " ") |
| |
| def test_repeat_minmax(self): |
| self.assertIsNone(re.match("^(\w){1}$", "abc")) |
| self.assertIsNone(re.match("^(\w){1}?$", "abc")) |
| self.assertIsNone(re.match("^(\w){1,2}$", "abc")) |
| self.assertIsNone(re.match("^(\w){1,2}?$", "abc")) |
| |
| self.assertEqual(re.match("^(\w){3}$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){1,3}$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){1,4}$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){3,4}?$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){3}?$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){1,3}?$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){1,4}?$", "abc").group(1), "c") |
| self.assertEqual(re.match("^(\w){3,4}?$", "abc").group(1), "c") |
| |
| self.assertIsNone(re.match("^x{1}$", "xxx")) |
| self.assertIsNone(re.match("^x{1}?$", "xxx")) |
| self.assertIsNone(re.match("^x{1,2}$", "xxx")) |
| self.assertIsNone(re.match("^x{1,2}?$", "xxx")) |
| |
| self.assertTrue(re.match("^x{3}$", "xxx")) |
| self.assertTrue(re.match("^x{1,3}$", "xxx")) |
| self.assertTrue(re.match("^x{1,4}$", "xxx")) |
| self.assertTrue(re.match("^x{3,4}?$", "xxx")) |
| self.assertTrue(re.match("^x{3}?$", "xxx")) |
| self.assertTrue(re.match("^x{1,3}?$", "xxx")) |
| self.assertTrue(re.match("^x{1,4}?$", "xxx")) |
| self.assertTrue(re.match("^x{3,4}?$", "xxx")) |
| |
| self.assertIsNone(re.match("^x{}$", "xxx")) |
| self.assertTrue(re.match("^x{}$", "x{}")) |
| |
| def test_getattr(self): |
| self.assertEqual(re.compile("(?i)(a)(b)").pattern, "(?i)(a)(b)") |
| self.assertEqual(re.compile("(?i)(a)(b)").flags, re.I | re.U) |
| self.assertEqual(re.compile("(?i)(a)(b)").groups, 2) |
| self.assertEqual(re.compile("(?i)(a)(b)").groupindex, {}) |
| self.assertEqual(re.compile("(?i)(?P<first>a)(?P<other>b)").groupindex, |
| {'first': 1, 'other': 2}) |
| |
| self.assertEqual(re.match("(a)", "a").pos, 0) |
| self.assertEqual(re.match("(a)", "a").endpos, 1) |
| self.assertEqual(re.match("(a)", "a").string, "a") |
| self.assertEqual(re.match("(a)", "a").regs, ((0, 1), (0, 1))) |
| self.assertTrue(re.match("(a)", "a").re) |
| |
| def test_special_escapes(self): |
| self.assertEqual(re.search(r"\b(b.)\b", |
| "abcd abc bcd bx").group(1), "bx") |
| self.assertEqual(re.search(r"\B(b.)\B", |
| "abc bcd bc abxd").group(1), "bx") |
| self.assertEqual(re.search(r"\b(b.)\b", |
| "abcd abc bcd bx", re.ASCII).group(1), "bx") |
| self.assertEqual(re.search(r"\B(b.)\B", |
| "abc bcd bc abxd", re.ASCII).group(1), "bx") |
| self.assertEqual(re.search(r"^abc$", "\nabc\n", re.M).group(0), "abc") |
| self.assertEqual(re.search(r"^\Aabc\Z$", "abc", re.M).group(0), "abc") |
| self.assertIsNone(re.search(r"^\Aabc\Z$", "\nabc\n", re.M)) |
| self.assertEqual(re.search(br"\b(b.)\b", |
| b"abcd abc bcd bx").group(1), b"bx") |
| self.assertEqual(re.search(br"\B(b.)\B", |
| b"abc bcd bc abxd").group(1), b"bx") |
| self.assertEqual(re.search(br"\b(b.)\b", |
| b"abcd abc bcd bx", re.LOCALE).group(1), b"bx") |
| self.assertEqual(re.search(br"\B(b.)\B", |
| b"abc bcd bc abxd", re.LOCALE).group(1), b"bx") |
| self.assertEqual(re.search(br"^abc$", b"\nabc\n", re.M).group(0), b"abc") |
| self.assertEqual(re.search(br"^\Aabc\Z$", b"abc", re.M).group(0), b"abc") |
| self.assertIsNone(re.search(br"^\Aabc\Z$", b"\nabc\n", re.M)) |
| self.assertEqual(re.search(r"\d\D\w\W\s\S", |
| "1aa! a").group(0), "1aa! a") |
| self.assertEqual(re.search(br"\d\D\w\W\s\S", |
| b"1aa! a").group(0), b"1aa! a") |
| self.assertEqual(re.search(r"\d\D\w\W\s\S", |
| "1aa! a", re.ASCII).group(0), "1aa! a") |
| self.assertEqual(re.search(br"\d\D\w\W\s\S", |
| b"1aa! a", re.LOCALE).group(0), b"1aa! a") |
| |
| def test_other_escapes(self): |
| self.assertRaises(re.error, re.compile, "\\") |
| self.assertEqual(re.match(r"\(", '(').group(), '(') |
| self.assertIsNone(re.match(r"\(", ')')) |
| self.assertEqual(re.match(r"\\", '\\').group(), '\\') |
| self.assertEqual(re.match(r"\y", 'y').group(), 'y') |
| self.assertIsNone(re.match(r"\y", 'z')) |
| self.assertEqual(re.match(r"[\]]", ']').group(), ']') |
| self.assertIsNone(re.match(r"[\]]", '[')) |
| self.assertEqual(re.match(r"[a\-c]", '-').group(), '-') |
| self.assertIsNone(re.match(r"[a\-c]", 'b')) |
| self.assertEqual(re.match(r"[\^a]+", 'a^').group(), 'a^') |
| self.assertIsNone(re.match(r"[\^a]+", 'b')) |
| |
| def test_string_boundaries(self): |
| # See http://bugs.python.org/issue10713 |
| self.assertEqual(re.search(r"\b(abc)\b", "abc").group(1), |
| "abc") |
| # There's a word boundary at the start of a string. |
| self.assertTrue(re.match(r"\b", "abc")) |
| # A non-empty string includes a non-boundary zero-length match. |
| self.assertTrue(re.search(r"\B", "abc")) |
| # There is no non-boundary match at the start of a string. |
| self.assertFalse(re.match(r"\B", "abc")) |
| # However, an empty string contains no word boundaries, and also no |
| # non-boundaries. |
| self.assertIsNone(re.search(r"\B", "")) |
| # This one is questionable and different from the perlre behaviour, |
| # but describes current behavior. |
| self.assertIsNone(re.search(r"\b", "")) |
| # A single word-character string has two boundaries, but no |
| # non-boundary gaps. |
| self.assertEqual(len(re.findall(r"\b", "a")), 2) |
| self.assertEqual(len(re.findall(r"\B", "a")), 0) |
| # If there are no words, there are no boundaries |
| self.assertEqual(len(re.findall(r"\b", " ")), 0) |
| self.assertEqual(len(re.findall(r"\b", " ")), 0) |
| # Can match around the whitespace. |
| self.assertEqual(len(re.findall(r"\B", " ")), 2) |
| |
| def test_bigcharset(self): |
| self.assertEqual(re.match("([\u2222\u2223])", |
| "\u2222").group(1), "\u2222") |
| r = '[%s]' % ''.join(map(chr, range(256, 2**16, 255))) |
| self.assertEqual(re.match(r, "\uff01").group(), "\uff01") |
| |
| def test_big_codesize(self): |
| # Issue #1160 |
| r = re.compile('|'.join(('%d'%x for x in range(10000)))) |
| self.assertTrue(r.match('1000')) |
| self.assertTrue(r.match('9999')) |
| |
| def test_anyall(self): |
| self.assertEqual(re.match("a.b", "a\nb", re.DOTALL).group(0), |
| "a\nb") |
| self.assertEqual(re.match("a.*b", "a\n\nb", re.DOTALL).group(0), |
| "a\n\nb") |
| |
| def test_lookahead(self): |
| self.assertEqual(re.match("(a(?=\s[^a]))", "a b").group(1), "a") |
| self.assertEqual(re.match("(a(?=\s[^a]*))", "a b").group(1), "a") |
| self.assertEqual(re.match("(a(?=\s[abc]))", "a b").group(1), "a") |
| self.assertEqual(re.match("(a(?=\s[abc]*))", "a bc").group(1), "a") |
| self.assertEqual(re.match(r"(a)(?=\s\1)", "a a").group(1), "a") |
| self.assertEqual(re.match(r"(a)(?=\s\1*)", "a aa").group(1), "a") |
| self.assertEqual(re.match(r"(a)(?=\s(abc|a))", "a a").group(1), "a") |
| |
| self.assertEqual(re.match(r"(a(?!\s[^a]))", "a a").group(1), "a") |
| self.assertEqual(re.match(r"(a(?!\s[abc]))", "a d").group(1), "a") |
| self.assertEqual(re.match(r"(a)(?!\s\1)", "a b").group(1), "a") |
| self.assertEqual(re.match(r"(a)(?!\s(abc|a))", "a b").group(1), "a") |
| |
| # Group reference. |
| self.assertTrue(re.match(r'(a)b(?=\1)a', 'aba')) |
| self.assertIsNone(re.match(r'(a)b(?=\1)c', 'abac')) |
| # Conditional group reference. |
| self.assertTrue(re.match(r'(?:(a)|(x))b(?=(?(2)x|c))c', 'abc')) |
| self.assertIsNone(re.match(r'(?:(a)|(x))b(?=(?(2)c|x))c', 'abc')) |
| self.assertTrue(re.match(r'(?:(a)|(x))b(?=(?(2)x|c))c', 'abc')) |
| self.assertIsNone(re.match(r'(?:(a)|(x))b(?=(?(1)b|x))c', 'abc')) |
| self.assertTrue(re.match(r'(?:(a)|(x))b(?=(?(1)c|x))c', 'abc')) |
| # Group used before defined. |
| self.assertTrue(re.match(r'(a)b(?=(?(2)x|c))(c)', 'abc')) |
| self.assertIsNone(re.match(r'(a)b(?=(?(2)b|x))(c)', 'abc')) |
| self.assertTrue(re.match(r'(a)b(?=(?(1)c|x))(c)', 'abc')) |
| |
| def test_lookbehind(self): |
| self.assertTrue(re.match(r'ab(?<=b)c', 'abc')) |
| self.assertIsNone(re.match(r'ab(?<=c)c', 'abc')) |
| self.assertIsNone(re.match(r'ab(?<!b)c', 'abc')) |
| self.assertTrue(re.match(r'ab(?<!c)c', 'abc')) |
| # Group reference. |
| self.assertTrue(re.match(r'(a)a(?<=\1)c', 'aac')) |
| self.assertIsNone(re.match(r'(a)b(?<=\1)a', 'abaa')) |
| self.assertIsNone(re.match(r'(a)a(?<!\1)c', 'aac')) |
| self.assertTrue(re.match(r'(a)b(?<!\1)a', 'abaa')) |
| # Conditional group reference. |
| self.assertIsNone(re.match(r'(?:(a)|(x))b(?<=(?(2)x|c))c', 'abc')) |
| self.assertIsNone(re.match(r'(?:(a)|(x))b(?<=(?(2)b|x))c', 'abc')) |
| self.assertTrue(re.match(r'(?:(a)|(x))b(?<=(?(2)x|b))c', 'abc')) |
| self.assertIsNone(re.match(r'(?:(a)|(x))b(?<=(?(1)c|x))c', 'abc')) |
| self.assertTrue(re.match(r'(?:(a)|(x))b(?<=(?(1)b|x))c', 'abc')) |
| # Group used before defined. |
| self.assertRaises(re.error, re.compile, r'(a)b(?<=(?(2)b|x))(c)') |
| self.assertIsNone(re.match(r'(a)b(?<=(?(1)c|x))(c)', 'abc')) |
| self.assertTrue(re.match(r'(a)b(?<=(?(1)b|x))(c)', 'abc')) |
| # Group defined in the same lookbehind pattern |
| self.assertRaises(re.error, re.compile, r'(a)b(?<=(.)\2)(c)') |
| self.assertRaises(re.error, re.compile, r'(a)b(?<=(?P<a>.)(?P=a))(c)') |
| self.assertRaises(re.error, re.compile, r'(a)b(?<=(a)(?(2)b|x))(c)') |
| self.assertRaises(re.error, re.compile, r'(a)b(?<=(.)(?<=\2))(c)') |
| |
| def test_ignore_case(self): |
| self.assertEqual(re.match("abc", "ABC", re.I).group(0), "ABC") |
| self.assertEqual(re.match(b"abc", b"ABC", re.I).group(0), b"ABC") |
| self.assertEqual(re.match(r"(a\s[^a])", "a b", re.I).group(1), "a b") |
| self.assertEqual(re.match(r"(a\s[^a]*)", "a bb", re.I).group(1), "a bb") |
| self.assertEqual(re.match(r"(a\s[abc])", "a b", re.I).group(1), "a b") |
| self.assertEqual(re.match(r"(a\s[abc]*)", "a bb", re.I).group(1), "a bb") |
| self.assertEqual(re.match(r"((a)\s\2)", "a a", re.I).group(1), "a a") |
| self.assertEqual(re.match(r"((a)\s\2*)", "a aa", re.I).group(1), "a aa") |
| self.assertEqual(re.match(r"((a)\s(abc|a))", "a a", re.I).group(1), "a a") |
| self.assertEqual(re.match(r"((a)\s(abc|a)*)", "a aa", re.I).group(1), "a aa") |
| |
| assert '\u212a'.lower() == 'k' # 'K' |
| self.assertTrue(re.match(r'K', '\u212a', re.I)) |
| self.assertTrue(re.match(r'k', '\u212a', re.I)) |
| self.assertTrue(re.match(r'\u212a', 'K', re.I)) |
| self.assertTrue(re.match(r'\u212a', 'k', re.I)) |
| assert '\u017f'.upper() == 'S' # 'ſ' |
| self.assertTrue(re.match(r'S', '\u017f', re.I)) |
| self.assertTrue(re.match(r's', '\u017f', re.I)) |
| self.assertTrue(re.match(r'\u017f', 'S', re.I)) |
| self.assertTrue(re.match(r'\u017f', 's', re.I)) |
| assert '\ufb05'.upper() == '\ufb06'.upper() == 'ST' # 'ſt', 'st' |
| self.assertTrue(re.match(r'\ufb05', '\ufb06', re.I)) |
| self.assertTrue(re.match(r'\ufb06', '\ufb05', re.I)) |
| |
| def test_ignore_case_set(self): |
| self.assertTrue(re.match(r'[19A]', 'A', re.I)) |
| self.assertTrue(re.match(r'[19a]', 'a', re.I)) |
| self.assertTrue(re.match(r'[19a]', 'A', re.I)) |
| self.assertTrue(re.match(r'[19A]', 'a', re.I)) |
| self.assertTrue(re.match(br'[19A]', b'A', re.I)) |
| self.assertTrue(re.match(br'[19a]', b'a', re.I)) |
| self.assertTrue(re.match(br'[19a]', b'A', re.I)) |
| self.assertTrue(re.match(br'[19A]', b'a', re.I)) |
| assert '\u212a'.lower() == 'k' # 'K' |
| self.assertTrue(re.match(r'[19K]', '\u212a', re.I)) |
| self.assertTrue(re.match(r'[19k]', '\u212a', re.I)) |
| self.assertTrue(re.match(r'[19\u212a]', 'K', re.I)) |
| self.assertTrue(re.match(r'[19\u212a]', 'k', re.I)) |
| assert '\u017f'.upper() == 'S' # 'ſ' |
| self.assertTrue(re.match(r'[19S]', '\u017f', re.I)) |
| self.assertTrue(re.match(r'[19s]', '\u017f', re.I)) |
| self.assertTrue(re.match(r'[19\u017f]', 'S', re.I)) |
| self.assertTrue(re.match(r'[19\u017f]', 's', re.I)) |
| assert '\ufb05'.upper() == '\ufb06'.upper() == 'ST' # 'ſt', 'st' |
| self.assertTrue(re.match(r'[19\ufb05]', '\ufb06', re.I)) |
| self.assertTrue(re.match(r'[19\ufb06]', '\ufb05', re.I)) |
| |
| def test_ignore_case_range(self): |
| # Issues #3511, #17381. |
| self.assertTrue(re.match(r'[9-a]', '_', re.I)) |
| self.assertIsNone(re.match(r'[9-A]', '_', re.I)) |
| self.assertTrue(re.match(br'[9-a]', b'_', re.I)) |
| self.assertIsNone(re.match(br'[9-A]', b'_', re.I)) |
| self.assertTrue(re.match(r'[\xc0-\xde]', '\xd7', re.I)) |
| self.assertIsNone(re.match(r'[\xc0-\xde]', '\xf7', re.I)) |
| self.assertTrue(re.match(r'[\xe0-\xfe]', '\xf7', re.I)) |
| self.assertIsNone(re.match(r'[\xe0-\xfe]', '\xd7', re.I)) |
| self.assertTrue(re.match(r'[\u0430-\u045f]', '\u0450', re.I)) |
| self.assertTrue(re.match(r'[\u0430-\u045f]', '\u0400', re.I)) |
| self.assertTrue(re.match(r'[\u0400-\u042f]', '\u0450', re.I)) |
| self.assertTrue(re.match(r'[\u0400-\u042f]', '\u0400', re.I)) |
| self.assertTrue(re.match(r'[\U00010428-\U0001044f]', '\U00010428', re.I)) |
| self.assertTrue(re.match(r'[\U00010428-\U0001044f]', '\U00010400', re.I)) |
| self.assertTrue(re.match(r'[\U00010400-\U00010427]', '\U00010428', re.I)) |
| self.assertTrue(re.match(r'[\U00010400-\U00010427]', '\U00010400', re.I)) |
| |
| assert '\u212a'.lower() == 'k' # 'K' |
| self.assertTrue(re.match(r'[J-M]', '\u212a', re.I)) |
| self.assertTrue(re.match(r'[j-m]', '\u212a', re.I)) |
| self.assertTrue(re.match(r'[\u2129-\u212b]', 'K', re.I)) |
| self.assertTrue(re.match(r'[\u2129-\u212b]', 'k', re.I)) |
| assert '\u017f'.upper() == 'S' # 'ſ' |
| self.assertTrue(re.match(r'[R-T]', '\u017f', re.I)) |
| self.assertTrue(re.match(r'[r-t]', '\u017f', re.I)) |
| self.assertTrue(re.match(r'[\u017e-\u0180]', 'S', re.I)) |
| self.assertTrue(re.match(r'[\u017e-\u0180]', 's', re.I)) |
| assert '\ufb05'.upper() == '\ufb06'.upper() == 'ST' # 'ſt', 'st' |
| self.assertTrue(re.match(r'[\ufb04-\ufb05]', '\ufb06', re.I)) |
| self.assertTrue(re.match(r'[\ufb06-\ufb07]', '\ufb05', re.I)) |
| |
| def test_category(self): |
| self.assertEqual(re.match(r"(\s)", " ").group(1), " ") |
| |
| def test_getlower(self): |
| import _sre |
| self.assertEqual(_sre.getlower(ord('A'), 0), ord('a')) |
| self.assertEqual(_sre.getlower(ord('A'), re.LOCALE), ord('a')) |
| self.assertEqual(_sre.getlower(ord('A'), re.UNICODE), ord('a')) |
| self.assertEqual(_sre.getlower(ord('A'), re.ASCII), ord('a')) |
| |
| self.assertEqual(re.match("abc", "ABC", re.I).group(0), "ABC") |
| self.assertEqual(re.match(b"abc", b"ABC", re.I).group(0), b"ABC") |
| self.assertEqual(re.match("abc", "ABC", re.I|re.A).group(0), "ABC") |
| self.assertEqual(re.match(b"abc", b"ABC", re.I|re.L).group(0), b"ABC") |
| |
| def test_not_literal(self): |
| self.assertEqual(re.search("\s([^a])", " b").group(1), "b") |
| self.assertEqual(re.search("\s([^a]*)", " bb").group(1), "bb") |
| |
| def test_search_coverage(self): |
| self.assertEqual(re.search("\s(b)", " b").group(1), "b") |
| self.assertEqual(re.search("a\s", "a ").group(0), "a ") |
| |
| def assertMatch(self, pattern, text, match=None, span=None, |
| matcher=re.match): |
| if match is None and span is None: |
| # the pattern matches the whole text |
| match = text |
| span = (0, len(text)) |
| elif match is None or span is None: |
| raise ValueError('If match is not None, span should be specified ' |
| '(and vice versa).') |
| m = matcher(pattern, text) |
| self.assertTrue(m) |
| self.assertEqual(m.group(), match) |
| self.assertEqual(m.span(), span) |
| |
| def test_re_escape(self): |
| alnum_chars = string.ascii_letters + string.digits + '_' |
| p = ''.join(chr(i) for i in range(256)) |
| for c in p: |
| if c in alnum_chars: |
| self.assertEqual(re.escape(c), c) |
| elif c == '\x00': |
| self.assertEqual(re.escape(c), '\\000') |
| else: |
| self.assertEqual(re.escape(c), '\\' + c) |
| self.assertMatch(re.escape(c), c) |
| self.assertMatch(re.escape(p), p) |
| |
| def test_re_escape_byte(self): |
| alnum_chars = (string.ascii_letters + string.digits + '_').encode('ascii') |
| p = bytes(range(256)) |
| for i in p: |
| b = bytes([i]) |
| if b in alnum_chars: |
| self.assertEqual(re.escape(b), b) |
| elif i == 0: |
| self.assertEqual(re.escape(b), b'\\000') |
| else: |
| self.assertEqual(re.escape(b), b'\\' + b) |
| self.assertMatch(re.escape(b), b) |
| self.assertMatch(re.escape(p), p) |
| |
| def test_re_escape_non_ascii(self): |
| s = 'xxx\u2620\u2620\u2620xxx' |
| s_escaped = re.escape(s) |
| self.assertEqual(s_escaped, 'xxx\\\u2620\\\u2620\\\u2620xxx') |
| self.assertMatch(s_escaped, s) |
| self.assertMatch('.%s+.' % re.escape('\u2620'), s, |
| 'x\u2620\u2620\u2620x', (2, 7), re.search) |
| |
| def test_re_escape_non_ascii_bytes(self): |
| b = 'y\u2620y\u2620y'.encode('utf-8') |
| b_escaped = re.escape(b) |
| self.assertEqual(b_escaped, b'y\\\xe2\\\x98\\\xa0y\\\xe2\\\x98\\\xa0y') |
| self.assertMatch(b_escaped, b) |
| res = re.findall(re.escape('\u2620'.encode('utf-8')), b) |
| self.assertEqual(len(res), 2) |
| |
| def test_pickling(self): |
| import pickle |
| oldpat = re.compile('a(?:b|(c|e){1,2}?|d)+?(.)', re.UNICODE) |
| for proto in range(pickle.HIGHEST_PROTOCOL + 1): |
| pickled = pickle.dumps(oldpat, proto) |
| newpat = pickle.loads(pickled) |
| self.assertEqual(newpat, oldpat) |
| # current pickle expects the _compile() reconstructor in re module |
| from re import _compile |
| |
| def test_constants(self): |
| self.assertEqual(re.I, re.IGNORECASE) |
| self.assertEqual(re.L, re.LOCALE) |
| self.assertEqual(re.M, re.MULTILINE) |
| self.assertEqual(re.S, re.DOTALL) |
| self.assertEqual(re.X, re.VERBOSE) |
| |
| def test_flags(self): |
| for flag in [re.I, re.M, re.X, re.S, re.A, re.U]: |
| self.assertTrue(re.compile('^pattern$', flag)) |
| for flag in [re.I, re.M, re.X, re.S, re.A, re.L]: |
| self.assertTrue(re.compile(b'^pattern$', flag)) |
| |
| def test_sre_character_literals(self): |
| for i in [0, 8, 16, 32, 64, 127, 128, 255, 256, 0xFFFF, 0x10000, 0x10FFFF]: |
| if i < 256: |
| self.assertTrue(re.match(r"\%03o" % i, chr(i))) |
| self.assertTrue(re.match(r"\%03o0" % i, chr(i)+"0")) |
| self.assertTrue(re.match(r"\%03o8" % i, chr(i)+"8")) |
| self.assertTrue(re.match(r"\x%02x" % i, chr(i))) |
| self.assertTrue(re.match(r"\x%02x0" % i, chr(i)+"0")) |
| self.assertTrue(re.match(r"\x%02xz" % i, chr(i)+"z")) |
| if i < 0x10000: |
| self.assertTrue(re.match(r"\u%04x" % i, chr(i))) |
| self.assertTrue(re.match(r"\u%04x0" % i, chr(i)+"0")) |
| self.assertTrue(re.match(r"\u%04xz" % i, chr(i)+"z")) |
| self.assertTrue(re.match(r"\U%08x" % i, chr(i))) |
| self.assertTrue(re.match(r"\U%08x0" % i, chr(i)+"0")) |
| self.assertTrue(re.match(r"\U%08xz" % i, chr(i)+"z")) |
| self.assertTrue(re.match(r"\0", "\000")) |
| self.assertTrue(re.match(r"\08", "\0008")) |
| self.assertTrue(re.match(r"\01", "\001")) |
| self.assertTrue(re.match(r"\018", "\0018")) |
| self.assertRaises(re.error, re.match, r"\567", "") |
| self.assertRaises(re.error, re.match, r"\911", "") |
| self.assertRaises(re.error, re.match, r"\x1", "") |
| self.assertRaises(re.error, re.match, r"\x1z", "") |
| self.assertRaises(re.error, re.match, r"\u123", "") |
| self.assertRaises(re.error, re.match, r"\u123z", "") |
| self.assertRaises(re.error, re.match, r"\U0001234", "") |
| self.assertRaises(re.error, re.match, r"\U0001234z", "") |
| self.assertRaises(re.error, re.match, r"\U00110000", "") |
| |
| def test_sre_character_class_literals(self): |
| for i in [0, 8, 16, 32, 64, 127, 128, 255, 256, 0xFFFF, 0x10000, 0x10FFFF]: |
| if i < 256: |
| self.assertTrue(re.match(r"[\%o]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\%o8]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\%03o]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\%03o0]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\%03o8]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\x%02x]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\x%02x0]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\x%02xz]" % i, chr(i))) |
| if i < 0x10000: |
| self.assertTrue(re.match(r"[\u%04x]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\u%04x0]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\u%04xz]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\U%08x]" % i, chr(i))) |
| self.assertTrue(re.match(r"[\U%08x0]" % i, chr(i)+"0")) |
| self.assertTrue(re.match(r"[\U%08xz]" % i, chr(i)+"z")) |
| self.assertRaises(re.error, re.match, r"[\567]", "") |
| self.assertRaises(re.error, re.match, r"[\911]", "") |
| self.assertRaises(re.error, re.match, r"[\x1z]", "") |
| self.assertRaises(re.error, re.match, r"[\u123z]", "") |
| self.assertRaises(re.error, re.match, r"[\U0001234z]", "") |
| self.assertRaises(re.error, re.match, r"[\U00110000]", "") |
| self.assertTrue(re.match(r"[\U0001d49c-\U0001d4b5]", "\U0001d49e")) |
| |
| def test_sre_byte_literals(self): |
| for i in [0, 8, 16, 32, 64, 127, 128, 255]: |
| self.assertTrue(re.match((r"\%03o" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"\%03o0" % i).encode(), bytes([i])+b"0")) |
| self.assertTrue(re.match((r"\%03o8" % i).encode(), bytes([i])+b"8")) |
| self.assertTrue(re.match((r"\x%02x" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"\x%02x0" % i).encode(), bytes([i])+b"0")) |
| self.assertTrue(re.match((r"\x%02xz" % i).encode(), bytes([i])+b"z")) |
| self.assertTrue(re.match(br"\u", b'u')) |
| self.assertTrue(re.match(br"\U", b'U')) |
| self.assertTrue(re.match(br"\0", b"\000")) |
| self.assertTrue(re.match(br"\08", b"\0008")) |
| self.assertTrue(re.match(br"\01", b"\001")) |
| self.assertTrue(re.match(br"\018", b"\0018")) |
| self.assertRaises(re.error, re.match, br"\567", b"") |
| self.assertRaises(re.error, re.match, br"\911", b"") |
| self.assertRaises(re.error, re.match, br"\x1", b"") |
| self.assertRaises(re.error, re.match, br"\x1z", b"") |
| |
| def test_sre_byte_class_literals(self): |
| for i in [0, 8, 16, 32, 64, 127, 128, 255]: |
| self.assertTrue(re.match((r"[\%o]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\%o8]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\%03o]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\%03o0]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\%03o8]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\x%02x]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\x%02x0]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match((r"[\x%02xz]" % i).encode(), bytes([i]))) |
| self.assertTrue(re.match(br"[\u]", b'u')) |
| self.assertTrue(re.match(br"[\U]", b'U')) |
| self.assertRaises(re.error, re.match, br"[\567]", b"") |
| self.assertRaises(re.error, re.match, br"[\911]", b"") |
| self.assertRaises(re.error, re.match, br"[\x1z]", b"") |
| |
| def test_bug_113254(self): |
| self.assertEqual(re.match(r'(a)|(b)', 'b').start(1), -1) |
| self.assertEqual(re.match(r'(a)|(b)', 'b').end(1), -1) |
| self.assertEqual(re.match(r'(a)|(b)', 'b').span(1), (-1, -1)) |
| |
| def test_bug_527371(self): |
| # bug described in patches 527371/672491 |
| self.assertIsNone(re.match(r'(a)?a','a').lastindex) |
| self.assertEqual(re.match(r'(a)(b)?b','ab').lastindex, 1) |
| self.assertEqual(re.match(r'(?P<a>a)(?P<b>b)?b','ab').lastgroup, 'a') |
| self.assertEqual(re.match("(?P<a>a(b))", "ab").lastgroup, 'a') |
| self.assertEqual(re.match("((a))", "a").lastindex, 1) |
| |
| def test_bug_545855(self): |
| # bug 545855 -- This pattern failed to cause a compile error as it |
| # should, instead provoking a TypeError. |
| self.assertRaises(re.error, re.compile, 'foo[a-') |
| |
| def test_bug_418626(self): |
| # bugs 418626 at al. -- Testing Greg Chapman's addition of op code |
| # SRE_OP_MIN_REPEAT_ONE for eliminating recursion on simple uses of |
| # pattern '*?' on a long string. |
| self.assertEqual(re.match('.*?c', 10000*'ab'+'cd').end(0), 20001) |
| self.assertEqual(re.match('.*?cd', 5000*'ab'+'c'+5000*'ab'+'cde').end(0), |
| 20003) |
| self.assertEqual(re.match('.*?cd', 20000*'abc'+'de').end(0), 60001) |
| # non-simple '*?' still used to hit the recursion limit, before the |
| # non-recursive scheme was implemented. |
| self.assertEqual(re.search('(a|b)*?c', 10000*'ab'+'cd').end(0), 20001) |
| |
| def test_bug_612074(self): |
| pat="["+re.escape("\u2039")+"]" |
| self.assertEqual(re.compile(pat) and 1, 1) |
| |
| def test_stack_overflow(self): |
| # nasty cases that used to overflow the straightforward recursive |
| # implementation of repeated groups. |
| self.assertEqual(re.match('(x)*', 50000*'x').group(1), 'x') |
| self.assertEqual(re.match('(x)*y', 50000*'x'+'y').group(1), 'x') |
| self.assertEqual(re.match('(x)*?y', 50000*'x'+'y').group(1), 'x') |
| |
| def test_unlimited_zero_width_repeat(self): |
| # Issue #9669 |
| self.assertIsNone(re.match(r'(?:a?)*y', 'z')) |
| self.assertIsNone(re.match(r'(?:a?)+y', 'z')) |
| self.assertIsNone(re.match(r'(?:a?){2,}y', 'z')) |
| self.assertIsNone(re.match(r'(?:a?)*?y', 'z')) |
| self.assertIsNone(re.match(r'(?:a?)+?y', 'z')) |
| self.assertIsNone(re.match(r'(?:a?){2,}?y', 'z')) |
| |
| def test_scanner(self): |
| def s_ident(scanner, token): return token |
| def s_operator(scanner, token): return "op%s" % token |
| def s_float(scanner, token): return float(token) |
| def s_int(scanner, token): return int(token) |
| |
| scanner = Scanner([ |
| (r"[a-zA-Z_]\w*", s_ident), |
| (r"\d+\.\d*", s_float), |
| (r"\d+", s_int), |
| (r"=|\+|-|\*|/", s_operator), |
| (r"\s+", None), |
| ]) |
| |
| self.assertTrue(scanner.scanner.scanner("").pattern) |
| |
| self.assertEqual(scanner.scan("sum = 3*foo + 312.50 + bar"), |
| (['sum', 'op=', 3, 'op*', 'foo', 'op+', 312.5, |
| 'op+', 'bar'], '')) |
| |
| def test_bug_448951(self): |
| # bug 448951 (similar to 429357, but with single char match) |
| # (Also test greedy matches.) |
| for op in '','?','*': |
| self.assertEqual(re.match(r'((.%s):)?z'%op, 'z').groups(), |
| (None, None)) |
| self.assertEqual(re.match(r'((.%s):)?z'%op, 'a:z').groups(), |
| ('a:', 'a')) |
| |
| def test_bug_725106(self): |
| # capturing groups in alternatives in repeats |
| self.assertEqual(re.match('^((a)|b)*', 'abc').groups(), |
| ('b', 'a')) |
| self.assertEqual(re.match('^(([ab])|c)*', 'abc').groups(), |
| ('c', 'b')) |
| self.assertEqual(re.match('^((d)|[ab])*', 'abc').groups(), |
| ('b', None)) |
| self.assertEqual(re.match('^((a)c|[ab])*', 'abc').groups(), |
| ('b', None)) |
| self.assertEqual(re.match('^((a)|b)*?c', 'abc').groups(), |
| ('b', 'a')) |
| self.assertEqual(re.match('^(([ab])|c)*?d', 'abcd').groups(), |
| ('c', 'b')) |
| self.assertEqual(re.match('^((d)|[ab])*?c', 'abc').groups(), |
| ('b', None)) |
| self.assertEqual(re.match('^((a)c|[ab])*?c', 'abc').groups(), |
| ('b', None)) |
| |
| def test_bug_725149(self): |
| # mark_stack_base restoring before restoring marks |
| self.assertEqual(re.match('(a)(?:(?=(b)*)c)*', 'abb').groups(), |
| ('a', None)) |
| self.assertEqual(re.match('(a)((?!(b)*))*', 'abb').groups(), |
| ('a', None, None)) |
| |
| def test_bug_764548(self): |
| # bug 764548, re.compile() barfs on str/unicode subclasses |
| class my_unicode(str): pass |
| pat = re.compile(my_unicode("abc")) |
| self.assertIsNone(pat.match("xyz")) |
| |
| def test_finditer(self): |
| iter = re.finditer(r":+", "a:b::c:::d") |
| self.assertEqual([item.group(0) for item in iter], |
| [":", "::", ":::"]) |
| |
| pat = re.compile(r":+") |
| iter = pat.finditer("a:b::c:::d", 1, 10) |
| self.assertEqual([item.group(0) for item in iter], |
| [":", "::", ":::"]) |
| |
| pat = re.compile(r":+") |
| iter = pat.finditer("a:b::c:::d", pos=1, endpos=10) |
| self.assertEqual([item.group(0) for item in iter], |
| [":", "::", ":::"]) |
| |
| pat = re.compile(r":+") |
| iter = pat.finditer("a:b::c:::d", endpos=10, pos=1) |
| self.assertEqual([item.group(0) for item in iter], |
| [":", "::", ":::"]) |
| |
| pat = re.compile(r":+") |
| iter = pat.finditer("a:b::c:::d", pos=3, endpos=8) |
| self.assertEqual([item.group(0) for item in iter], |
| ["::", "::"]) |
| |
| def test_bug_926075(self): |
| self.assertIsNot(re.compile('bug_926075'), |
| re.compile(b'bug_926075')) |
| |
| def test_bug_931848(self): |
| pattern = "[\u002E\u3002\uFF0E\uFF61]" |
| self.assertEqual(re.compile(pattern).split("a.b.c"), |
| ['a','b','c']) |
| |
| def test_bug_581080(self): |
| iter = re.finditer(r"\s", "a b") |
| self.assertEqual(next(iter).span(), (1,2)) |
| self.assertRaises(StopIteration, next, iter) |
| |
| scanner = re.compile(r"\s").scanner("a b") |
| self.assertEqual(scanner.search().span(), (1, 2)) |
| self.assertIsNone(scanner.search()) |
| |
| def test_bug_817234(self): |
| iter = re.finditer(r".*", "asdf") |
| self.assertEqual(next(iter).span(), (0, 4)) |
| self.assertEqual(next(iter).span(), (4, 4)) |
| self.assertRaises(StopIteration, next, iter) |
| |
| def test_bug_6561(self): |
| # '\d' should match characters in Unicode category 'Nd' |
| # (Number, Decimal Digit), but not those in 'Nl' (Number, |
| # Letter) or 'No' (Number, Other). |
| decimal_digits = [ |
| '\u0037', # '\N{DIGIT SEVEN}', category 'Nd' |
| '\u0e58', # '\N{THAI DIGIT SIX}', category 'Nd' |
| '\uff10', # '\N{FULLWIDTH DIGIT ZERO}', category 'Nd' |
| ] |
| for x in decimal_digits: |
| self.assertEqual(re.match('^\d$', x).group(0), x) |
| |
| not_decimal_digits = [ |
| '\u2165', # '\N{ROMAN NUMERAL SIX}', category 'Nl' |
| '\u3039', # '\N{HANGZHOU NUMERAL TWENTY}', category 'Nl' |
| '\u2082', # '\N{SUBSCRIPT TWO}', category 'No' |
| '\u32b4', # '\N{CIRCLED NUMBER THIRTY NINE}', category 'No' |
| ] |
| for x in not_decimal_digits: |
| self.assertIsNone(re.match('^\d$', x)) |
| |
| def test_empty_array(self): |
| # SF buf 1647541 |
| import array |
| for typecode in 'bBuhHiIlLfd': |
| a = array.array(typecode) |
| self.assertIsNone(re.compile(b"bla").match(a)) |
| self.assertEqual(re.compile(b"").match(a).groups(), ()) |
| |
| def test_inline_flags(self): |
| # Bug #1700 |
| upper_char = '\u1ea0' # Latin Capital Letter A with Dot Below |
| lower_char = '\u1ea1' # Latin Small Letter A with Dot Below |
| |
| p = re.compile(upper_char, re.I | re.U) |
| q = p.match(lower_char) |
| self.assertTrue(q) |
| |
| p = re.compile(lower_char, re.I | re.U) |
| q = p.match(upper_char) |
| self.assertTrue(q) |
| |
| p = re.compile('(?i)' + upper_char, re.U) |
| q = p.match(lower_char) |
| self.assertTrue(q) |
| |
| p = re.compile('(?i)' + lower_char, re.U) |
| q = p.match(upper_char) |
| self.assertTrue(q) |
| |
| p = re.compile('(?iu)' + upper_char) |
| q = p.match(lower_char) |
| self.assertTrue(q) |
| |
| p = re.compile('(?iu)' + lower_char) |
| q = p.match(upper_char) |
| self.assertTrue(q) |
| |
| def test_dollar_matches_twice(self): |
| "$ matches the end of string, and just before the terminating \n" |
| pattern = re.compile('$') |
| self.assertEqual(pattern.sub('#', 'a\nb\n'), 'a\nb#\n#') |
| self.assertEqual(pattern.sub('#', 'a\nb\nc'), 'a\nb\nc#') |
| self.assertEqual(pattern.sub('#', '\n'), '#\n#') |
| |
| pattern = re.compile('$', re.MULTILINE) |
| self.assertEqual(pattern.sub('#', 'a\nb\n' ), 'a#\nb#\n#' ) |
| self.assertEqual(pattern.sub('#', 'a\nb\nc'), 'a#\nb#\nc#') |
| self.assertEqual(pattern.sub('#', '\n'), '#\n#') |
| |
| def test_bytes_str_mixing(self): |
| # Mixing str and bytes is disallowed |
| pat = re.compile('.') |
| bpat = re.compile(b'.') |
| self.assertRaises(TypeError, pat.match, b'b') |
| self.assertRaises(TypeError, bpat.match, 'b') |
| self.assertRaises(TypeError, pat.sub, b'b', 'c') |
| self.assertRaises(TypeError, pat.sub, 'b', b'c') |
| self.assertRaises(TypeError, pat.sub, b'b', b'c') |
| self.assertRaises(TypeError, bpat.sub, b'b', 'c') |
| self.assertRaises(TypeError, bpat.sub, 'b', b'c') |
| self.assertRaises(TypeError, bpat.sub, 'b', 'c') |
| |
| def test_ascii_and_unicode_flag(self): |
| # String patterns |
| for flags in (0, re.UNICODE): |
| pat = re.compile('\xc0', flags | re.IGNORECASE) |
| self.assertTrue(pat.match('\xe0')) |
| pat = re.compile('\w', flags) |
| self.assertTrue(pat.match('\xe0')) |
| pat = re.compile('\xc0', re.ASCII | re.IGNORECASE) |
| self.assertIsNone(pat.match('\xe0')) |
| pat = re.compile('(?a)\xc0', re.IGNORECASE) |
| self.assertIsNone(pat.match('\xe0')) |
| pat = re.compile('\w', re.ASCII) |
| self.assertIsNone(pat.match('\xe0')) |
| pat = re.compile('(?a)\w') |
| self.assertIsNone(pat.match('\xe0')) |
| # Bytes patterns |
| for flags in (0, re.ASCII): |
| pat = re.compile(b'\xc0', flags | re.IGNORECASE) |
| self.assertIsNone(pat.match(b'\xe0')) |
| pat = re.compile(b'\w', flags) |
| self.assertIsNone(pat.match(b'\xe0')) |
| # Incompatibilities |
| self.assertRaises(ValueError, re.compile, b'\w', re.UNICODE) |
| self.assertRaises(ValueError, re.compile, b'(?u)\w') |
| self.assertRaises(ValueError, re.compile, '\w', re.UNICODE | re.ASCII) |
| self.assertRaises(ValueError, re.compile, '(?u)\w', re.ASCII) |
| self.assertRaises(ValueError, re.compile, '(?a)\w', re.UNICODE) |
| self.assertRaises(ValueError, re.compile, '(?au)\w') |
| |
| def test_locale_flag(self): |
| import locale |
| _, enc = locale.getlocale(locale.LC_CTYPE) |
| # Search non-ASCII letter |
| for i in range(128, 256): |
| try: |
| c = bytes([i]).decode(enc) |
| sletter = c.lower() |
| if sletter == c: continue |
| bletter = sletter.encode(enc) |
| if len(bletter) != 1: continue |
| if bletter.decode(enc) != sletter: continue |
| bpat = re.escape(bytes([i])) |
| break |
| except (UnicodeError, TypeError): |
| pass |
| else: |
| bletter = None |
| bpat = b'A' |
| # Bytes patterns |
| pat = re.compile(bpat, re.LOCALE | re.IGNORECASE) |
| if bletter: |
| self.assertTrue(pat.match(bletter)) |
| pat = re.compile(b'(?L)' + bpat, re.IGNORECASE) |
| if bletter: |
| self.assertTrue(pat.match(bletter)) |
| pat = re.compile(bpat, re.IGNORECASE) |
| if bletter: |
| self.assertIsNone(pat.match(bletter)) |
| pat = re.compile(b'\w', re.LOCALE) |
| if bletter: |
| self.assertTrue(pat.match(bletter)) |
| pat = re.compile(b'(?L)\w') |
| if bletter: |
| self.assertTrue(pat.match(bletter)) |
| pat = re.compile(b'\w') |
| if bletter: |
| self.assertIsNone(pat.match(bletter)) |
| # Incompatibilities |
| self.assertWarns(DeprecationWarning, re.compile, '', re.LOCALE) |
| self.assertWarns(DeprecationWarning, re.compile, '(?L)') |
| self.assertWarns(DeprecationWarning, re.compile, b'', re.LOCALE | re.ASCII) |
| self.assertWarns(DeprecationWarning, re.compile, b'(?L)', re.ASCII) |
| self.assertWarns(DeprecationWarning, re.compile, b'(?a)', re.LOCALE) |
| self.assertWarns(DeprecationWarning, re.compile, b'(?aL)') |
| |
| def test_bug_6509(self): |
| # Replacement strings of both types must parse properly. |
| # all strings |
| pat = re.compile('a(\w)') |
| self.assertEqual(pat.sub('b\\1', 'ac'), 'bc') |
| pat = re.compile('a(.)') |
| self.assertEqual(pat.sub('b\\1', 'a\u1234'), 'b\u1234') |
| pat = re.compile('..') |
| self.assertEqual(pat.sub(lambda m: 'str', 'a5'), 'str') |
| |
| # all bytes |
| pat = re.compile(b'a(\w)') |
| self.assertEqual(pat.sub(b'b\\1', b'ac'), b'bc') |
| pat = re.compile(b'a(.)') |
| self.assertEqual(pat.sub(b'b\\1', b'a\xCD'), b'b\xCD') |
| pat = re.compile(b'..') |
| self.assertEqual(pat.sub(lambda m: b'bytes', b'a5'), b'bytes') |
| |
| def test_dealloc(self): |
| # issue 3299: check for segfault in debug build |
| import _sre |
| # the overflow limit is different on wide and narrow builds and it |
| # depends on the definition of SRE_CODE (see sre.h). |
| # 2**128 should be big enough to overflow on both. For smaller values |
| # a RuntimeError is raised instead of OverflowError. |
| long_overflow = 2**128 |
| self.assertRaises(TypeError, re.finditer, "a", {}) |
| with self.assertRaises(OverflowError): |
| _sre.compile("abc", 0, [long_overflow], 0, [], []) |
| with self.assertRaises(TypeError): |
| _sre.compile({}, 0, [], 0, [], []) |
| |
| def test_search_dot_unicode(self): |
| self.assertTrue(re.search("123.*-", '123abc-')) |
| self.assertTrue(re.search("123.*-", '123\xe9-')) |
| self.assertTrue(re.search("123.*-", '123\u20ac-')) |
| self.assertTrue(re.search("123.*-", '123\U0010ffff-')) |
| self.assertTrue(re.search("123.*-", '123\xe9\u20ac\U0010ffff-')) |
| |
| def test_compile(self): |
| # Test return value when given string and pattern as parameter |
| pattern = re.compile('random pattern') |
| self.assertIsInstance(pattern, re._pattern_type) |
| same_pattern = re.compile(pattern) |
| self.assertIsInstance(same_pattern, re._pattern_type) |
| self.assertIs(same_pattern, pattern) |
| # Test behaviour when not given a string or pattern as parameter |
| self.assertRaises(TypeError, re.compile, 0) |
| |
| def test_bug_13899(self): |
| # Issue #13899: re pattern r"[\A]" should work like "A" but matches |
| # nothing. Ditto B and Z. |
| self.assertEqual(re.findall(r'[\A\B\b\C\Z]', 'AB\bCZ'), |
| ['A', 'B', '\b', 'C', 'Z']) |
| |
| @bigmemtest(size=_2G, memuse=1) |
| def test_large_search(self, size): |
| # Issue #10182: indices were 32-bit-truncated. |
| s = 'a' * size |
| m = re.search('$', s) |
| self.assertIsNotNone(m) |
| self.assertEqual(m.start(), size) |
| self.assertEqual(m.end(), size) |
| |
| # The huge memuse is because of re.sub() using a list and a join() |
| # to create the replacement result. |
| @bigmemtest(size=_2G, memuse=16 + 2) |
| def test_large_subn(self, size): |
| # Issue #10182: indices were 32-bit-truncated. |
| s = 'a' * size |
| r, n = re.subn('', '', s) |
| self.assertEqual(r, s) |
| self.assertEqual(n, size + 1) |
| |
| def test_bug_16688(self): |
| # Issue 16688: Backreferences make case-insensitive regex fail on |
| # non-ASCII strings. |
| self.assertEqual(re.findall(r"(?i)(a)\1", "aa \u0100"), ['a']) |
| self.assertEqual(re.match(r"(?s).{1,3}", "\u0100\u0100").span(), (0, 2)) |
| |
| def test_repeat_minmax_overflow(self): |
| # Issue #13169 |
| string = "x" * 100000 |
| self.assertEqual(re.match(r".{65535}", string).span(), (0, 65535)) |
| self.assertEqual(re.match(r".{,65535}", string).span(), (0, 65535)) |
| self.assertEqual(re.match(r".{65535,}?", string).span(), (0, 65535)) |
| self.assertEqual(re.match(r".{65536}", string).span(), (0, 65536)) |
| self.assertEqual(re.match(r".{,65536}", string).span(), (0, 65536)) |
| self.assertEqual(re.match(r".{65536,}?", string).span(), (0, 65536)) |
| # 2**128 should be big enough to overflow both SRE_CODE and Py_ssize_t. |
| self.assertRaises(OverflowError, re.compile, r".{%d}" % 2**128) |
| self.assertRaises(OverflowError, re.compile, r".{,%d}" % 2**128) |
| self.assertRaises(OverflowError, re.compile, r".{%d,}?" % 2**128) |
| self.assertRaises(OverflowError, re.compile, r".{%d,%d}" % (2**129, 2**128)) |
| |
| @cpython_only |
| def test_repeat_minmax_overflow_maxrepeat(self): |
| try: |
| from _sre import MAXREPEAT |
| except ImportError: |
| self.skipTest('requires _sre.MAXREPEAT constant') |
| string = "x" * 100000 |
| self.assertIsNone(re.match(r".{%d}" % (MAXREPEAT - 1), string)) |
| self.assertEqual(re.match(r".{,%d}" % (MAXREPEAT - 1), string).span(), |
| (0, 100000)) |
| self.assertIsNone(re.match(r".{%d,}?" % (MAXREPEAT - 1), string)) |
| self.assertRaises(OverflowError, re.compile, r".{%d}" % MAXREPEAT) |
| self.assertRaises(OverflowError, re.compile, r".{,%d}" % MAXREPEAT) |
| self.assertRaises(OverflowError, re.compile, r".{%d,}?" % MAXREPEAT) |
| |
| def test_backref_group_name_in_exception(self): |
| # Issue 17341: Poor error message when compiling invalid regex |
| with self.assertRaisesRegex(sre_constants.error, '<foo>'): |
| re.compile('(?P=<foo>)') |
| |
| def test_group_name_in_exception(self): |
| # Issue 17341: Poor error message when compiling invalid regex |
| with self.assertRaisesRegex(sre_constants.error, '\?foo'): |
| re.compile('(?P<?foo>)') |
| |
| def test_issue17998(self): |
| for reps in '*', '+', '?', '{1}': |
| for mod in '', '?': |
| pattern = '.' + reps + mod + 'yz' |
| self.assertEqual(re.compile(pattern, re.S).findall('xyz'), |
| ['xyz'], msg=pattern) |
| pattern = pattern.encode() |
| self.assertEqual(re.compile(pattern, re.S).findall(b'xyz'), |
| [b'xyz'], msg=pattern) |
| |
| def test_match_repr(self): |
| for string in '[abracadabra]', S('[abracadabra]'): |
| m = re.search(r'(.+)(.*?)\1', string) |
| self.assertEqual(repr(m), "<%s.%s object; " |
| "span=(1, 12), match='abracadabra'>" % |
| (type(m).__module__, type(m).__qualname__)) |
| for string in (b'[abracadabra]', B(b'[abracadabra]'), |
| bytearray(b'[abracadabra]'), |
| memoryview(b'[abracadabra]')): |
| m = re.search(rb'(.+)(.*?)\1', string) |
| self.assertEqual(repr(m), "<%s.%s object; " |
| "span=(1, 12), match=b'abracadabra'>" % |
| (type(m).__module__, type(m).__qualname__)) |
| |
| first, second = list(re.finditer("(aa)|(bb)", "aa bb")) |
| self.assertEqual(repr(first), "<%s.%s object; " |
| "span=(0, 2), match='aa'>" % |
| (type(second).__module__, type(first).__qualname__)) |
| self.assertEqual(repr(second), "<%s.%s object; " |
| "span=(3, 5), match='bb'>" % |
| (type(second).__module__, type(second).__qualname__)) |
| |
| |
| def test_bug_2537(self): |
| # issue 2537: empty submatches |
| for outer_op in ('{0,}', '*', '+', '{1,187}'): |
| for inner_op in ('{0,}', '*', '?'): |
| r = re.compile("^((x|y)%s)%s" % (inner_op, outer_op)) |
| m = r.match("xyyzy") |
| self.assertEqual(m.group(0), "xyy") |
| self.assertEqual(m.group(1), "") |
| self.assertEqual(m.group(2), "y") |
| |
| def test_debug_flag(self): |
| pat = r'(\.)(?:[ch]|py)(?(1)$|: )' |
| with captured_stdout() as out: |
| re.compile(pat, re.DEBUG) |
| dump = '''\ |
| SUBPATTERN 1 |
| LITERAL 46 |
| SUBPATTERN None |
| BRANCH |
| IN |
| LITERAL 99 |
| LITERAL 104 |
| OR |
| LITERAL 112 |
| LITERAL 121 |
| SUBPATTERN None |
| GROUPREF_EXISTS 1 |
| AT AT_END |
| ELSE |
| LITERAL 58 |
| LITERAL 32 |
| ''' |
| self.assertEqual(out.getvalue(), dump) |
| # Debug output is output again even a second time (bypassing |
| # the cache -- issue #20426). |
| with captured_stdout() as out: |
| re.compile(pat, re.DEBUG) |
| self.assertEqual(out.getvalue(), dump) |
| |
| def test_keyword_parameters(self): |
| # Issue #20283: Accepting the string keyword parameter. |
| pat = re.compile(r'(ab)') |
| self.assertEqual( |
| pat.match(string='abracadabra', pos=7, endpos=10).span(), (7, 9)) |
| self.assertEqual( |
| pat.fullmatch(string='abracadabra', pos=7, endpos=9).span(), (7, 9)) |
| self.assertEqual( |
| pat.search(string='abracadabra', pos=3, endpos=10).span(), (7, 9)) |
| self.assertEqual( |
| pat.findall(string='abracadabra', pos=3, endpos=10), ['ab']) |
| self.assertEqual( |
| pat.split(string='abracadabra', maxsplit=1), |
| ['', 'ab', 'racadabra']) |
| self.assertEqual( |
| pat.scanner(string='abracadabra', pos=3, endpos=10).search().span(), |
| (7, 9)) |
| |
| def test_bug_20998(self): |
| # Issue #20998: Fullmatch of repeated single character pattern |
| # with ignore case. |
| self.assertEqual(re.fullmatch('[a-c]+', 'ABC', re.I).span(), (0, 3)) |
| |
| def test_locale_caching(self): |
| # Issue #22410 |
| oldlocale = locale.setlocale(locale.LC_CTYPE) |
| self.addCleanup(locale.setlocale, locale.LC_CTYPE, oldlocale) |
| for loc in 'en_US.iso88591', 'en_US.utf8': |
| try: |
| locale.setlocale(locale.LC_CTYPE, loc) |
| except locale.Error: |
| # Unsupported locale on this system |
| self.skipTest('test needs %s locale' % loc) |
| |
| re.purge() |
| self.check_en_US_iso88591() |
| self.check_en_US_utf8() |
| re.purge() |
| self.check_en_US_utf8() |
| self.check_en_US_iso88591() |
| |
| def check_en_US_iso88591(self): |
| locale.setlocale(locale.LC_CTYPE, 'en_US.iso88591') |
| self.assertTrue(re.match(b'\xc5\xe5', b'\xc5\xe5', re.L|re.I)) |
| self.assertTrue(re.match(b'\xc5', b'\xe5', re.L|re.I)) |
| self.assertTrue(re.match(b'\xe5', b'\xc5', re.L|re.I)) |
| self.assertTrue(re.match(b'(?Li)\xc5\xe5', b'\xc5\xe5')) |
| self.assertTrue(re.match(b'(?Li)\xc5', b'\xe5')) |
| self.assertTrue(re.match(b'(?Li)\xe5', b'\xc5')) |
| |
| def check_en_US_utf8(self): |
| locale.setlocale(locale.LC_CTYPE, 'en_US.utf8') |
| self.assertTrue(re.match(b'\xc5\xe5', b'\xc5\xe5', re.L|re.I)) |
| self.assertIsNone(re.match(b'\xc5', b'\xe5', re.L|re.I)) |
| self.assertIsNone(re.match(b'\xe5', b'\xc5', re.L|re.I)) |
| self.assertTrue(re.match(b'(?Li)\xc5\xe5', b'\xc5\xe5')) |
| self.assertIsNone(re.match(b'(?Li)\xc5', b'\xe5')) |
| self.assertIsNone(re.match(b'(?Li)\xe5', b'\xc5')) |
| |
| def test_error(self): |
| with self.assertRaises(re.error) as cm: |
| re.compile('(\u20ac))') |
| err = cm.exception |
| self.assertIsInstance(err.pattern, str) |
| self.assertEqual(err.pattern, '(\u20ac))') |
| self.assertEqual(err.pos, 3) |
| self.assertEqual(err.lineno, 1) |
| self.assertEqual(err.colno, 4) |
| self.assertIn(err.msg, str(err)) |
| self.assertIn(' at position 3', str(err)) |
| self.assertNotIn(' at position 3', err.msg) |
| # Bytes pattern |
| with self.assertRaises(re.error) as cm: |
| re.compile(b'(\xa4))') |
| err = cm.exception |
| self.assertIsInstance(err.pattern, bytes) |
| self.assertEqual(err.pattern, b'(\xa4))') |
| self.assertEqual(err.pos, 3) |
| # Multiline pattern |
| with self.assertRaises(re.error) as cm: |
| re.compile(""" |
| ( |
| abc |
| ) |
| ) |
| ( |
| """, re.VERBOSE) |
| err = cm.exception |
| self.assertEqual(err.pos, 77) |
| self.assertEqual(err.lineno, 5) |
| self.assertEqual(err.colno, 17) |
| self.assertIn(err.msg, str(err)) |
| self.assertIn(' at position 77', str(err)) |
| self.assertIn('(line 5, column 17)', str(err)) |
| |
| |
| class PatternReprTests(unittest.TestCase): |
| def check(self, pattern, expected): |
| self.assertEqual(repr(re.compile(pattern)), expected) |
| |
| def check_flags(self, pattern, flags, expected): |
| self.assertEqual(repr(re.compile(pattern, flags)), expected) |
| |
| def test_without_flags(self): |
| self.check('random pattern', |
| "re.compile('random pattern')") |
| |
| def test_single_flag(self): |
| self.check_flags('random pattern', re.IGNORECASE, |
| "re.compile('random pattern', re.IGNORECASE)") |
| |
| def test_multiple_flags(self): |
| self.check_flags('random pattern', re.I|re.S|re.X, |
| "re.compile('random pattern', " |
| "re.IGNORECASE|re.DOTALL|re.VERBOSE)") |
| |
| def test_unicode_flag(self): |
| self.check_flags('random pattern', re.U, |
| "re.compile('random pattern')") |
| self.check_flags('random pattern', re.I|re.S|re.U, |
| "re.compile('random pattern', " |
| "re.IGNORECASE|re.DOTALL)") |
| |
| def test_inline_flags(self): |
| self.check('(?i)pattern', |
| "re.compile('(?i)pattern', re.IGNORECASE)") |
| |
| def test_unknown_flags(self): |
| self.check_flags('random pattern', 0x123000, |
| "re.compile('random pattern', 0x123000)") |
| self.check_flags('random pattern', 0x123000|re.I, |
| "re.compile('random pattern', re.IGNORECASE|0x123000)") |
| |
| def test_bytes(self): |
| self.check(b'bytes pattern', |
| "re.compile(b'bytes pattern')") |
| self.check_flags(b'bytes pattern', re.A, |
| "re.compile(b'bytes pattern', re.ASCII)") |
| |
| def test_locale(self): |
| self.check_flags(b'bytes pattern', re.L, |
| "re.compile(b'bytes pattern', re.LOCALE)") |
| |
| def test_quotes(self): |
| self.check('random "double quoted" pattern', |
| '''re.compile('random "double quoted" pattern')''') |
| self.check("random 'single quoted' pattern", |
| '''re.compile("random 'single quoted' pattern")''') |
| self.check('''both 'single' and "double" quotes''', |
| '''re.compile('both \\'single\\' and "double" quotes')''') |
| |
| def test_long_pattern(self): |
| pattern = 'Very %spattern' % ('long ' * 1000) |
| r = repr(re.compile(pattern)) |
| self.assertLess(len(r), 300) |
| self.assertEqual(r[:30], "re.compile('Very long long lon") |
| r = repr(re.compile(pattern, re.I)) |
| self.assertLess(len(r), 300) |
| self.assertEqual(r[:30], "re.compile('Very long long lon") |
| self.assertEqual(r[-16:], ", re.IGNORECASE)") |
| |
| |
| class ImplementationTest(unittest.TestCase): |
| """ |
| Test implementation details of the re module. |
| """ |
| |
| def test_overlap_table(self): |
| f = sre_compile._generate_overlap_table |
| self.assertEqual(f(""), []) |
| self.assertEqual(f("a"), [0]) |
| self.assertEqual(f("abcd"), [0, 0, 0, 0]) |
| self.assertEqual(f("aaaa"), [0, 1, 2, 3]) |
| self.assertEqual(f("ababba"), [0, 0, 1, 2, 0, 1]) |
| self.assertEqual(f("abcabdac"), [0, 0, 0, 1, 2, 0, 1, 0]) |
| |
| |
| class ExternalTests(unittest.TestCase): |
| |
| def test_re_benchmarks(self): |
| 're_tests benchmarks' |
| from test.re_tests import benchmarks |
| for pattern, s in benchmarks: |
| with self.subTest(pattern=pattern, string=s): |
| p = re.compile(pattern) |
| self.assertTrue(p.search(s)) |
| self.assertTrue(p.match(s)) |
| self.assertTrue(p.fullmatch(s)) |
| s2 = ' '*10000 + s + ' '*10000 |
| self.assertTrue(p.search(s2)) |
| self.assertTrue(p.match(s2, 10000)) |
| self.assertTrue(p.match(s2, 10000, 10000 + len(s))) |
| self.assertTrue(p.fullmatch(s2, 10000, 10000 + len(s))) |
| |
| def test_re_tests(self): |
| 're_tests test suite' |
| from test.re_tests import tests, SUCCEED, FAIL, SYNTAX_ERROR |
| for t in tests: |
| pattern = s = outcome = repl = expected = None |
| if len(t) == 5: |
| pattern, s, outcome, repl, expected = t |
| elif len(t) == 3: |
| pattern, s, outcome = t |
| else: |
| raise ValueError('Test tuples should have 3 or 5 fields', t) |
| |
| with self.subTest(pattern=pattern, string=s): |
| if outcome == SYNTAX_ERROR: # Expected a syntax error |
| with self.assertRaises(re.error): |
| re.compile(pattern) |
| continue |
| |
| obj = re.compile(pattern) |
| result = obj.search(s) |
| if outcome == FAIL: |
| self.assertIsNone(result, 'Succeeded incorrectly') |
| continue |
| |
| with self.subTest(): |
| self.assertTrue(result, 'Failed incorrectly') |
| # Matched, as expected, so now we compute the |
| # result string and compare it to our expected result. |
| start, end = result.span(0) |
| vardict = {'found': result.group(0), |
| 'groups': result.group(), |
| 'flags': result.re.flags} |
| for i in range(1, 100): |
| try: |
| gi = result.group(i) |
| # Special hack because else the string concat fails: |
| if gi is None: |
| gi = "None" |
| except IndexError: |
| gi = "Error" |
| vardict['g%d' % i] = gi |
| for i in result.re.groupindex.keys(): |
| try: |
| gi = result.group(i) |
| if gi is None: |
| gi = "None" |
| except IndexError: |
| gi = "Error" |
| vardict[i] = gi |
| self.assertEqual(eval(repl, vardict), expected, |
| 'grouping error') |
| |
| # Try the match with both pattern and string converted to |
| # bytes, and check that it still succeeds. |
| try: |
| bpat = bytes(pattern, "ascii") |
| bs = bytes(s, "ascii") |
| except UnicodeEncodeError: |
| # skip non-ascii tests |
| pass |
| else: |
| with self.subTest('bytes pattern match'): |
| obj = re.compile(bpat) |
| self.assertTrue(obj.search(bs)) |
| |
| # Try the match with LOCALE enabled, and check that it |
| # still succeeds. |
| with self.subTest('locale-sensitive match'): |
| obj = re.compile(bpat, re.LOCALE) |
| result = obj.search(bs) |
| if result is None: |
| print('=== Fails on locale-sensitive match', t) |
| |
| # Try the match with the search area limited to the extent |
| # of the match and see if it still succeeds. \B will |
| # break (because it won't match at the end or start of a |
| # string), so we'll ignore patterns that feature it. |
| if (pattern[:2] != r'\B' and pattern[-2:] != r'\B' |
| and result is not None): |
| with self.subTest('range-limited match'): |
| obj = re.compile(pattern) |
| self.assertTrue(obj.search(s, start, end + 1)) |
| |
| # Try the match with IGNORECASE enabled, and check that it |
| # still succeeds. |
| with self.subTest('case-insensitive match'): |
| obj = re.compile(pattern, re.IGNORECASE) |
| self.assertTrue(obj.search(s)) |
| |
| # Try the match with UNICODE locale enabled, and check |
| # that it still succeeds. |
| with self.subTest('unicode-sensitive match'): |
| obj = re.compile(pattern, re.UNICODE) |
| self.assertTrue(obj.search(s)) |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |