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# SRE test harness for the Python regression suite
# this is based on test_re.py, but uses a test function instead
# of all those asserts
import sys
sys.path=['.']+sys.path
from test.test_support import verbose, TestFailed, have_unicode
import sre
import sys, os, string, traceback
#
# test support
def test(expression, result, exception=None):
try:
r = eval(expression)
except:
if exception:
if not isinstance(sys.exc_value, exception):
print expression, "FAILED"
# display name, not actual value
if exception is sre.error:
print "expected", "sre.error"
else:
print "expected", exception.__name__
print "got", sys.exc_type.__name__, str(sys.exc_value)
else:
print expression, "FAILED"
traceback.print_exc(file=sys.stdout)
else:
if exception:
print expression, "FAILED"
if exception is sre.error:
print "expected", "sre.error"
else:
print "expected", exception.__name__
print "got result", repr(r)
else:
if r != result:
print expression, "FAILED"
print "expected", repr(result)
print "got result", repr(r)
if verbose:
print 'Running tests on character literals'
#
# Misc tests from Tim Peters' re.doc
if verbose:
print 'Running tests on sre.search and sre.match'
test(r"""sre.search(r'x*', 'axx').span(0)""", (0, 0))
test(r"""sre.search(r'x*', 'axx').span()""", (0, 0))
test(r"""sre.search(r'x+', 'axx').span(0)""", (1, 3))
test(r"""sre.search(r'x+', 'axx').span()""", (1, 3))
test(r"""sre.search(r'x', 'aaa')""", None)
test(r"""sre.match(r'a*', 'xxx').span(0)""", (0, 0))
test(r"""sre.match(r'a*', 'xxx').span()""", (0, 0))
test(r"""sre.match(r'x*', 'xxxa').span(0)""", (0, 3))
test(r"""sre.match(r'x*', 'xxxa').span()""", (0, 3))
test(r"""sre.match(r'a+', 'xxx')""", None)
if verbose:
print "Running tests on sre.findall"
test(r"""sre.findall(r":+", "abc")""", [])
test(r"""sre.findall(r":+", "a:b::c:::d")""", [":", "::", ":::"])
test(r"""sre.findall(r"(:+)", "a:b::c:::d")""", [":", "::", ":::"])
test(r"""sre.findall(r"(:)(:*)", "a:b::c:::d")""",
[(":", ""), (":", ":"), (":", "::")])
test(r"""sre.findall(r"(a)|(b)", "abc")""", [("a", ""), ("", "b")])
# bug 117612
test(r"""sre.findall(r"(a|(b))", "aba")""", [("a", ""),("b", "b"),("a", "")])
if sys.hexversion >= 0x02020000:
if verbose:
print "Running tests on sre.finditer"
def fixup(seq):
# convert iterator to list
if not hasattr(seq, "next") or not hasattr(seq, "__iter__"):
print "finditer returned", type(seq)
return map(lambda item: item.group(0), seq)
# sanity
test(r"""fixup(sre.finditer(r":+", "a:b::c:::d"))""", [":", "::", ":::"])
if verbose:
print "Running tests on sre.match"
test(r"""sre.match(r'a', 'a').groups()""", ())
test(r"""sre.match(r'(a)', 'a').groups()""", ('a',))
test(r"""sre.match(r'(a)', 'a').group(0)""", 'a')
test(r"""sre.match(r'(a)', 'a').group(1)""", 'a')
test(r"""sre.match(r'(a)', 'a').group(1, 1)""", ('a', 'a'))
pat = sre.compile(r'((a)|(b))(c)?')
test(r"""pat.match('a').groups()""", ('a', 'a', None, None))
test(r"""pat.match('b').groups()""", ('b', None, 'b', None))
test(r"""pat.match('ac').groups()""", ('a', 'a', None, 'c'))
test(r"""pat.match('bc').groups()""", ('b', None, 'b', 'c'))
test(r"""pat.match('bc').groups("")""", ('b', "", 'b', 'c'))
pat = sre.compile(r'(?:(?P<a1>a)|(?P<b2>b))(?P<c3>c)?')
test(r"""pat.match('a').group(1, 2, 3)""", ('a', None, None))
test(r"""pat.match('b').group('a1', 'b2', 'c3')""", (None, 'b', None))
test(r"""pat.match('ac').group(1, 'b2', 3)""", ('a', None, 'c'))
# bug 448951 (similar to 429357, but with single char match)
# (Also test greedy matches.)
for op in '','?','*':
test(r"""sre.match(r'((.%s):)?z', 'z').groups()"""%op, (None, None))
test(r"""sre.match(r'((.%s):)?z', 'a:z').groups()"""%op, ('a:', 'a'))
if verbose:
print "Running tests on sre.escape"
p = ""
for i in range(0, 256):
p = p + chr(i)
test(r"""sre.match(sre.escape(chr(i)), chr(i)) is not None""", 1)
test(r"""sre.match(sre.escape(chr(i)), chr(i)).span()""", (0,1))
pat = sre.compile(sre.escape(p))
test(r"""pat.match(p) is not None""", 1)
test(r"""pat.match(p).span()""", (0,256))
if verbose:
print 'Running tests on sre.Scanner'
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 = sre.Scanner([
(r"[a-zA-Z_]\w*", s_ident),
(r"\d+\.\d*", s_float),
(r"\d+", s_int),
(r"=|\+|-|\*|/", s_operator),
(r"\s+", None),
])
# sanity check
test('scanner.scan("sum = 3*foo + 312.50 + bar")',
(['sum', 'op=', 3, 'op*', 'foo', 'op+', 312.5, 'op+', 'bar'], ''))
if verbose:
print 'Pickling a SRE_Pattern instance'
try:
import pickle
pat = sre.compile(r'a(?:b|(c|e){1,2}?|d)+?(.)')
s = pickle.dumps(pat)
pat = pickle.loads(s)
except:
print TestFailed, 're module pickle'
try:
import cPickle
pat = sre.compile(r'a(?:b|(c|e){1,2}?|d)+?(.)')
s = cPickle.dumps(pat)
pat = cPickle.loads(s)
except:
print TestFailed, 're module cPickle'
# constants
test(r"""sre.I""", sre.IGNORECASE)
test(r"""sre.L""", sre.LOCALE)
test(r"""sre.M""", sre.MULTILINE)
test(r"""sre.S""", sre.DOTALL)
test(r"""sre.X""", sre.VERBOSE)
test(r"""sre.T""", sre.TEMPLATE)
test(r"""sre.U""", sre.UNICODE)
for flags in [sre.I, sre.M, sre.X, sre.S, sre.L, sre.T, sre.U]:
try:
r = sre.compile('^pattern$', flags)
except:
print 'Exception raised on flag', flags
if verbose:
print 'Test engine limitations'
# Try nasty case that overflows the straightforward recursive
# implementation of repeated groups.
test("sre.match('(x)*', 50000*'x').span()", (0, 50000), RuntimeError)
test("sre.match(r'(x)*y', 50000*'x'+'y').span()", (0, 50001), RuntimeError)
test("sre.match(r'(x)*?y', 50000*'x'+'y').span()", (0, 50001), RuntimeError)
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