Lib/test/re_tests.py

# Re test suite and benchmark suite v1.5a2

# The 3 possible outcomes for each pattern
[SUCCEED, FAIL, SYNTAX_ERROR] = range(3)

# Benchmark suite (needs expansion)
#
# The benchmark suite does not test correctness, just speed.  The
# first element of each tuple is the regex pattern; the second is a 
# string to match it against.  The benchmarking code will embed the
# second string inside several sizes of padding, to test how regex 
# matching performs on large strings.

benchmarks = [
    ('Python', 'Python'),		# Simple text literal
    ('.*Python', 'Python'),		# Bad text literal
    ('.*Python.*', 'Python'),		# Worse text literal
    ('.*(Python)', 'Python'),		# Bad text literal with grouping
    
    ('(Python|Perl|Tcl', 'Perl'),	# Alternation
    ('(Python|Perl|Tcl)', 'Perl'),	# Grouped alternation
    ('(Python)\\1', 'PythonPython'),	# Backreference
    ('([0a-z][a-z]*,)+', 'a5,b7,c9,'),	# Disable the fastmap optimization
    ('([a-z][a-z0-9]*,)+', 'a5,b7,c9,') # A few sets
]

# Test suite (for verifying correctness)
#
# The test suite is a list of 5- or 3-tuples.  The 5 parts of a
# complete tuple are:
# element 0: a string containing the pattern
#         1: the string to match against the pattern
#         2: the expected result (SUCCEED, FAIL, SYNTAX_ERROR)
#         3: a string that will be eval()'ed to produce a test string.
#            This is an arbitrary Python expression; the available
#            variables are "found" (the whole match), and "g1", "g2", ...
#            up to "g99" contain the contents of each group, or the
#            string 'None' if the group wasn't given a value, or the
#            string 'Error' if the group index was out of range;
#            also "groups", the return value of m.group() (a tuple).
#         4: The expected result of evaluating the expression.
#            If the two don't match, an error is reported.
#
# If the regex isn't expected to work, the latter two elements can be omitted.

tests = [
('abc', 'abc', SUCCEED,
 'found', 'abc'),
('abc', 'xbc', FAIL),
('abc', 'axc', FAIL),
('abc', 'abx', FAIL),
('abc', 'xabcy', SUCCEED,
 'found', 'abc'),
('abc', 'ababc', SUCCEED,
 'found', 'abc'),
('ab*c', 'abc', SUCCEED,
 'found', 'abc'),
('ab*bc', 'abc', SUCCEED,
 'found', 'abc'),
('ab*bc', 'abbc', SUCCEED,
 'found', 'abbc'),
('ab*bc', 'abbbbc', SUCCEED,
 'found', 'abbbbc'),
('ab+bc', 'abbc', SUCCEED,
 'found', 'abbc'),
('ab+bc', 'abc', FAIL),
('ab+bc', 'abq', FAIL),
('ab+bc', 'abbbbc', SUCCEED,
 'found', 'abbbbc'),
('ab?bc', 'abbc', SUCCEED,
 'found', 'abbc'),
('ab?bc', 'abc', SUCCEED,
 'found', 'abc'),
('ab?bc', 'abbbbc', FAIL),
('ab?c', 'abc', SUCCEED,
 'found', 'abc'),
('^abc$', 'abc', SUCCEED,
 'found', 'abc'),
('^abc$', 'abcc', FAIL),
('^abc', 'abcc', SUCCEED,
 'found', 'abc'),
('^abc$', 'aabc', FAIL),
('abc$', 'aabc', SUCCEED,
 'found', 'abc'),
('^', 'abc', SUCCEED,
 'found+"-"', '-'),
('$', 'abc', SUCCEED,
 'found+"-"', '-'),
('a.c', 'abc', SUCCEED,
 'found', 'abc'),
('a.c', 'axc', SUCCEED,
 'found', 'axc'),
('a.*c', 'axyzc', SUCCEED,
 'found', 'axyzc'),
('a.*c', 'axyzd', FAIL),
('a[bc]d', 'abc', FAIL),
('a[bc]d', 'abd', SUCCEED,
 'found', 'abd'),
('a[b-d]e', 'abd', FAIL),
('a[b-d]e', 'ace', SUCCEED,
 'found', 'ace'),
('a[b-d]', 'aac', SUCCEED,
 'found', 'ac'),
('a[-b]', 'a-', SUCCEED,
 'found', 'a-'),
('a[b-]', 'a-', SYNTAX_ERROR),
('a[]b', '-', SYNTAX_ERROR),
('a[', '-', SYNTAX_ERROR),
('a\\', '-', SYNTAX_ERROR),
('abc)', '-', SYNTAX_ERROR),
('(abc', '-', SYNTAX_ERROR),
('a]', 'a]', SUCCEED,
 'found', 'a]'),
('a[]]b', 'a]b', SUCCEED,
 'found', 'a]b'),
('a[^bc]d', 'aed', SUCCEED,
 'found', 'aed'),
('a[^bc]d', 'abd', FAIL),
('a[^-b]c', 'adc', SUCCEED,
 'found', 'adc'),
('a[^-b]c', 'a-c', FAIL),
('a[^]b]c', 'a]c', FAIL),
('a[^]b]c', 'adc', SUCCEED,
 'found', 'adc'),
('\\ba\\b', 'a-', SUCCEED,
 '"-"', '-'),
('\\ba\\b', '-a', SUCCEED,
 '"-"', '-'),
('\\ba\\b', '-a-', SUCCEED,
 '"-"', '-'),
('\\by\\b', 'xy', FAIL),
('\\by\\b', 'yz', FAIL),
('\\by\\b', 'xyz', FAIL),
('ab|cd', 'abc', SUCCEED,
 'found', 'ab'),
('ab|cd', 'abcd', SUCCEED,
 'found', 'ab'),
('()ef', 'def', SUCCEED,
 'found+"-"+g1', 'ef-'),
('$b', 'b', FAIL),
('a\\(b', 'a(b', SUCCEED,
 'found+"-"+g1', 'a(b-Error'),
('a\\(*b', 'ab', SUCCEED,
 'found', 'ab'),
('a\\(*b', 'a((b', SUCCEED,
 'found', 'a((b'),
('a\\\\b', 'a\\b', SUCCEED,
 'found', 'a\\b'),
('((a))', 'abc', SUCCEED,
 'found+"-"+g1+"-"+g2', 'a-a-a'),
('(a)b(c)', 'abc', SUCCEED,
 'found+"-"+g1+"-"+g2', 'abc-a-c'),
('a+b+c', 'aabbabc', SUCCEED,
 'found', 'abc'),
('(a+|b)*', 'ab', SUCCEED,
 'found+"-"+g1', 'ab-b'),
('(a+|b)+', 'ab', SUCCEED,
 'found+"-"+g1', 'ab-b'),
('(a+|b)?', 'ab', SUCCEED,
 'found+"-"+g1', 'a-a'),
(')(', '-', SYNTAX_ERROR),
('[^ab]*', 'cde', SUCCEED,
 'found', 'cde'),
('abc', '', FAIL),
('a*', '', SUCCEED,
 'found', ''),
('a|b|c|d|e', 'e', SUCCEED,
 'found', 'e'),
('(a|b|c|d|e)f', 'ef', SUCCEED,
 'found+"-"+g1', 'ef-e'),
('abcd*efg', 'abcdefg', SUCCEED,
 'found', 'abcdefg'),
('ab*', 'xabyabbbz', SUCCEED,
 'found', 'ab'),
('ab*', 'xayabbbz', SUCCEED,
 'found', 'a'),
('(ab|cd)e', 'abcde', SUCCEED,
 'found+"-"+g1', 'cde-cd'),
('[abhgefdc]ij', 'hij', SUCCEED,
 'found', 'hij'),
('^(ab|cd)e', 'abcde', FAIL,
 'xg1y', 'xy'),
('(abc|)ef', 'abcdef', SUCCEED,
 'found+"-"+g1', 'ef-'),
('(a|b)c*d', 'abcd', SUCCEED,
 'found+"-"+g1', 'bcd-b'),
('(ab|ab*)bc', 'abc', SUCCEED,
 'found+"-"+g1', 'abc-a'),
('a([bc]*)c*', 'abc', SUCCEED,
 'found+"-"+g1', 'abc-bc'),
('a([bc]*)(c*d)', 'abcd', SUCCEED,
 'found+"-"+g1+"-"+g2', 'abcd-bc-d'),
('a([bc]+)(c*d)', 'abcd', SUCCEED,
 'found+"-"+g1+"-"+g2', 'abcd-bc-d'),
('a([bc]*)(c+d)', 'abcd', SUCCEED,
 'found+"-"+g1+"-"+g2', 'abcd-b-cd'),
('a[bcd]*dcdcde', 'adcdcde', SUCCEED,
 'found', 'adcdcde'),
('a[bcd]+dcdcde', 'adcdcde', FAIL),
('(ab|a)b*c', 'abc', SUCCEED,
 'found+"-"+g1', 'abc-ab'),
('((a)(b)c)(d)', 'abcd', SUCCEED,
 'g1+"-"+g2+"-"+g3+"-"+g4', 'abc-a-b-d'),
('[a-zA-Z_][a-zA-Z0-9_]*', 'alpha', SUCCEED,
 'found', 'alpha'),
('^a(bc+|b[eh])g|.h$', 'abh', SUCCEED,
 'found+"-"+g1', 'bh-None'),
('(bc+d$|ef*g.|h?i(j|k))', 'effgz', SUCCEED,
 'found+"-"+g1+"-"+g2', 'effgz-effgz-None'),
('(bc+d$|ef*g.|h?i(j|k))', 'ij', SUCCEED,
 'found+"-"+g1+"-"+g2', 'ij-ij-j'),
('(bc+d$|ef*g.|h?i(j|k))', 'effg', FAIL),
('(bc+d$|ef*g.|h?i(j|k))', 'bcdd', FAIL),
('(bc+d$|ef*g.|h?i(j|k))', 'reffgz', SUCCEED,
 'found+"-"+g1+"-"+g2', 'effgz-effgz-None'),
('(((((((((a)))))))))', 'a', SUCCEED,
 'found', 'a'),
('multiple words of text', 'uh-uh', FAIL),
('multiple words', 'multiple words, yeah', SUCCEED,
 'found', 'multiple words'),
('(.*)c(.*)', 'abcde', SUCCEED,
 'found+"-"+g1+"-"+g2', 'abcde-ab-de'),
('\\((.*), (.*)\\)', '(a, b)', SUCCEED,
 'g2+"-"+g1', 'b-a'),
('[k]', 'ab', FAIL),
('a[-]?c', 'ac', SUCCEED,
 'found', 'ac'),
('(abc)\\1', 'abcabc', SUCCEED,
 'g1', 'abc'),
('([a-c]*)\\1', 'abcabc', SUCCEED,
 'g1', 'abc'),
('^(.+)?B', 'AB', SUCCEED,
 'g1', 'A'),
('(a+).\\1$', 'aaaaa', SUCCEED,
 'found+"-"+g1', 'aaaaa-aa'),
('^(a+).\\1$', 'aaaa', FAIL),
('(abc)\\1', 'abcabc', SUCCEED,
 'found+"-"+g1', 'abcabc-abc'),
('([a-c]+)\\1', 'abcabc', SUCCEED,
 'found+"-"+g1', 'abcabc-abc'),
('(a)\\1', 'aa', SUCCEED,
 'found+"-"+g1', 'aa-a'),
('(a+)\\1', 'aa', SUCCEED,
 'found+"-"+g1', 'aa-a'),
('(a+)+\\1', 'aa', SUCCEED,
 'found+"-"+g1', 'aa-a'),
('(a).+\\1', 'aba', SUCCEED,
 'found+"-"+g1', 'aba-a'),
('(a)ba*\\1', 'aba', SUCCEED,
 'found+"-"+g1', 'aba-a'),
('(aa|a)a\\1$', 'aaa', SUCCEED,
 'found+"-"+g1', 'aaa-a'),
('(a|aa)a\\1$', 'aaa', SUCCEED,
 'found+"-"+g1', 'aaa-a'),
('(a+)a\\1$', 'aaa', SUCCEED,
 'found+"-"+g1', 'aaa-a'),
('([abc]*)\\1', 'abcabc', SUCCEED,
 'found+"-"+g1', 'abcabc-abc'),
('(a)(b)c|ab', 'ab', SUCCEED,
 'found+"-"+g1+"-"+g2', 'ab-None-None'),
('(a)+x', 'aaax', SUCCEED,
 'found+"-"+g1', 'aaax-a'),
('([ac])+x', 'aacx', SUCCEED,
 'found+"-"+g1', 'aacx-c'),
('([^/]*/)*sub1/', 'd:msgs/tdir/sub1/trial/away.cpp', SUCCEED,
 'found+"-"+g1', 'd:msgs/tdir/sub1/-tdir/'),
('([^.]*)\\.([^:]*):[T ]+(.*)', 'track1.title:TBlah blah blah', SUCCEED,
 'found+"-"+g1+"-"+g2+"-"+g3', 'track1.title:TBlah blah blah-track1-title-Blah blah blah'),
('([^N]*N)+', 'abNNxyzN', SUCCEED,
 'found+"-"+g1', 'abNNxyzN-xyzN'),
('([^N]*N)+', 'abNNxyz', SUCCEED,
 'found+"-"+g1', 'abNN-N'),
('([abc]*)x', 'abcx', SUCCEED,
 'found+"-"+g1', 'abcx-abc'),
('([abc]*)x', 'abc', FAIL),
('([xyz]*)x', 'abcx', SUCCEED,
 'found+"-"+g1', 'x-'),
('(a)+b|aac', 'aac', SUCCEED,
 'found+"-"+g1', 'aac-None'),
]