import sys sys.path = ['.'] + sys.path from test.test_support import verbose, run_suite import re import sys, os, traceback # Misc tests from Tim Peters' re.doc import unittest class ReTests(unittest.TestCase): 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.assertEqual(re.search('x', 'aaa') is None, True) 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.assertEqual(re.match('a+', 'xxx') is None, True) def bump_num(self, matchobj): int_value = int(matchobj.group(0)) return str(int_value + 1) def test_basic_re_sub(self): 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', 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('(?Px)', '\g\g', 'xx'), 'xxxx') self.assertEqual(re.sub('(?Px)', '\g\g<1>', 'xx'), 'xxxx') self.assertEqual(re.sub('(?Px)', '\g\g', 'xx'), 'xxxx') self.assertEqual(re.sub('(?Px)', '\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_escaped_re_sub(self): # Test for sub() on escaped characters, see SF bug #449000 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_qualified_re_sub(self): self.assertEqual(re.sub('a', 'b', 'aaaaa'), 'bbbbb') self.assertEqual(re.sub('a', 'b', 'aaaaa', 1), 'baaaa') def test_symbolic_refs(self): self.assertRaises(re.error, re.sub, '(?Px)', '\gx)', '\g<', 'xx') self.assertRaises(re.error, re.sub, '(?Px)', '\g', 'xx') self.assertRaises(re.error, re.sub, '(?Px)', '\g', 'xx') self.assertRaises(re.error, re.sub, '(?Px)', '\g<1a1>', 'xx') self.assertRaises(IndexError, re.sub, '(?Px)', '\g', 'xx') self.assertRaises(re.error, re.sub, '(?Px)|(?Py)', '\g', 'xx') self.assertRaises(re.error, re.sub, '(?Px)|(?Py)', '\\2', 'xx') 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", 2), ('xxxyz', 2)) def test_re_split(self): self.assertEqual(re.split(":", ":a:b::c"), ['', '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("(?::*)", ":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']) def test_qualified_re_split(self): self.assertEqual(re.split(":", ":a:b::c", 2), ['', 'a', 'b::c']) self.assertEqual(re.split(':', 'a:b:c:d', 2), ['a', 'b', 'c:d']) self.assertEqual(re.split("(:)", ":a:b::c", 2), ['', ':', 'a', ':', 'b::c']) self.assertEqual(re.split("(:*)", ":a:b::c", 2), ['', ':', 'a', ':', 'b::c']) def test_re_findall(self): self.assertEqual(re.findall(":+", "abc"), []) self.assertEqual(re.findall(":+", "a:b::c:::d"), [":", "::", ":::"]) self.assertEqual(re.findall("(:+)", "a:b::c:::d"), [":", "::", ":::"]) self.assertEqual(re.findall("(:)(:*)", "a:b::c:::d"), [(":", ""), (":", ":"), (":", "::")]) def test_re_match(self): # No groups at all m = re.match('a', 'a') self.assertEqual(m.groups(), ()) # A single group m = re.match('(a)', 'a') self.assertEqual(m.groups(), ('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('(?:(?Pa)|(?Pb))(?Pc)?') 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_escape(self): p="" for i in range(0, 256): p = p + chr(i) self.assertEqual(re.match(re.escape(chr(i)), chr(i)) is not None, True) self.assertEqual(re.match(re.escape(chr(i)), chr(i)).span(), (0,1)) pat=re.compile( re.escape(p) ) self.assertEqual(pat.match(p) is not None, True) self.assertEqual(pat.match(p).span(), (0,256)) def test_pickling(self): import pickle oldpat = re.compile('a(?:b|(c|e){1,2}?|d)+?(.)') s = pickle.dumps(oldpat) newpat = pickle.loads(s) self.assertEqual(oldpat, newpat) 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 flags in [re.I, re.M, re.X, re.S, re.L]: r = re.compile('^pattern$', flags) def test_limitations(self): # Try nasty case that overflows the straightforward recursive # implementation of repeated groups. self.assertEqual(re.match('(x)*', 50000*'x').span(), (0, 50000)) def run_re_tests(): from test.re_tests import benchmarks, tests, SUCCEED, FAIL, SYNTAX_ERROR if verbose: print 'Running re_tests test suite' else: # To save time, only run the first and last 10 tests #tests = tests[:10] + tests[-10:] pass for t in tests: sys.stdout.flush() 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) try: obj = re.compile(pattern) except re.error: if outcome == SYNTAX_ERROR: pass # Expected a syntax error else: print '=== Syntax error:', t except KeyboardInterrupt: raise KeyboardInterrupt except: print '*** Unexpected error ***', t if verbose: traceback.print_exc(file=sys.stdout) else: try: result = obj.search(s) except re.error, msg: print '=== Unexpected exception', t, repr(msg) if outcome == SYNTAX_ERROR: # This should have been a syntax error; forget it. pass elif outcome == FAIL: if result is None: pass # No match, as expected else: print '=== Succeeded incorrectly', t elif outcome == SUCCEED: if result is not None: # 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 repl = eval(repl, vardict) if repl != expected: print '=== grouping error', t, print repr(repl) + ' should be ' + repr(expected) else: print '=== Failed incorrectly', t # Try the match on a unicode string, and check that it # still succeeds. try: result = obj.search(unicode(s, "latin-1")) if result is None: print '=== Fails on unicode match', t except NameError: continue # 1.5.2 except TypeError: continue # unicode test case # Try the match on a unicode pattern, and check that it # still succeeds. obj=re.compile(unicode(pattern, "latin-1")) result = obj.search(s) if result is None: print '=== Fails on unicode pattern 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] != '\\B' and pattern[-2:] != '\\B' \ and result is not None: obj = re.compile(pattern) result = obj.search(s, result.start(0), result.end(0) + 1) if result is None: print '=== Failed on range-limited match', t # Try the match with IGNORECASE enabled, and check that it # still succeeds. obj = re.compile(pattern, re.IGNORECASE) result = obj.search(s) if result is None: print '=== Fails on case-insensitive match', t # Try the match with LOCALE enabled, and check that it # still succeeds. obj = re.compile(pattern, re.LOCALE) result = obj.search(s) if result is None: print '=== Fails on locale-sensitive match', t # Try the match with UNICODE locale enabled, and check # that it still succeeds. obj = re.compile(pattern, re.UNICODE) result = obj.search(s) if result is None: print '=== Fails on unicode-sensitive match', t def test_main(): run_re_tests() suite = unittest.TestSuite() suite.addTest(unittest.makeSuite(ReTests)) run_suite(suite) if __name__ == "__main__": test_main()