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-rw-r--r--tests/test_regexopt.py110
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diff --git a/tests/test_regexopt.py b/tests/test_regexopt.py
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-# -*- coding: utf-8 -*-
-"""
- Tests for pygments.regexopt
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- :copyright: Copyright 2006-2019 by the Pygments team, see AUTHORS.
- :license: BSD, see LICENSE for details.
-"""
-
-import re
-import random
-import unittest
-import itertools
-
-from pygments.regexopt import regex_opt
-
-ALPHABET = ['a', 'b', 'c', 'd', 'e']
-
-try:
- from itertools import combinations_with_replacement
- N_TRIES = 15
-except ImportError:
- # Python 2.6
- def combinations_with_replacement(iterable, r):
- pool = tuple(iterable)
- n = len(pool)
- for indices in itertools.product(range(n), repeat=r):
- if sorted(indices) == list(indices):
- yield tuple(pool[i] for i in indices)
- N_TRIES = 9
-
-
-class RegexOptTestCase(unittest.TestCase):
-
- def generate_keywordlist(self, length):
- return [''.join(p) for p in
- combinations_with_replacement(ALPHABET, length)]
-
- def test_randomly(self):
- # generate a list of all possible keywords of a certain length using
- # a restricted alphabet, then choose some to match and make sure only
- # those do
- for n in range(3, N_TRIES):
- kwlist = self.generate_keywordlist(n)
- to_match = random.sample(kwlist,
- random.randint(1, len(kwlist) - 1))
- no_match = set(kwlist) - set(to_match)
- rex = re.compile(regex_opt(to_match))
- self.assertEqual(rex.groups, 1)
- for w in to_match:
- self.assertTrue(rex.match(w))
- for w in no_match:
- self.assertFalse(rex.match(w))
-
- def test_prefix(self):
- opt = regex_opt(('a', 'b'), prefix=r':{1,2}')
- print(opt)
- rex = re.compile(opt)
- self.assertFalse(rex.match('a'))
- self.assertTrue(rex.match('::a'))
- self.assertFalse(rex.match(':::')) # fullmatch
-
- def test_suffix(self):
- opt = regex_opt(('a', 'b'), suffix=r':{1,2}')
- print(opt)
- rex = re.compile(opt)
- self.assertFalse(rex.match('a'))
- self.assertTrue(rex.match('a::'))
- self.assertFalse(rex.match(':::')) # fullmatch
-
- def test_suffix_opt(self):
- # test that detected suffixes remain sorted.
- opt = regex_opt(('afoo', 'abfoo'))
- print(opt)
- rex = re.compile(opt)
- m = rex.match('abfoo')
- self.assertEqual(5, m.end())
-
- def test_different_length_grouping(self):
- opt = regex_opt(('a', 'xyz'))
- print(opt)
- rex = re.compile(opt)
- self.assertTrue(rex.match('a'))
- self.assertTrue(rex.match('xyz'))
- self.assertFalse(rex.match('b'))
- self.assertEqual(1, rex.groups)
-
- def test_same_length_grouping(self):
- opt = regex_opt(('a', 'b'))
- print(opt)
- rex = re.compile(opt)
- self.assertTrue(rex.match('a'))
- self.assertTrue(rex.match('b'))
- self.assertFalse(rex.match('x'))
-
- self.assertEqual(1, rex.groups)
- groups = rex.match('a').groups()
- self.assertEqual(('a',), groups)
-
- def test_same_length_suffix_grouping(self):
- opt = regex_opt(('a', 'b'), suffix='(m)')
- print(opt)
- rex = re.compile(opt)
- self.assertTrue(rex.match('am'))
- self.assertTrue(rex.match('bm'))
- self.assertFalse(rex.match('xm'))
- self.assertFalse(rex.match('ax'))
- self.assertEqual(2, rex.groups)
- groups = rex.match('am').groups()
- self.assertEqual(('a', 'm'), groups)