1
# Copyright (C) 2006, 2011 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
"""Test that lazy regexes are not compiled right away"""
29
class TestErrors(tests.TestCase):
31
def test_invalid_pattern(self):
32
error = lazy_regex.InvalidPattern('Bad pattern msg.')
33
self.assertEqualDiff("Invalid pattern(s) found. Bad pattern msg.",
37
class InstrumentedLazyRegex(lazy_regex.LazyRegex):
38
"""Keep track of actions on the lazy regex"""
43
def use_actions(cls, actions):
44
cls._actions = actions
46
def __getattr__(self, attr):
47
self._actions.append(('__getattr__', attr))
48
return super(InstrumentedLazyRegex, self).__getattr__(attr)
50
def _real_re_compile(self, *args, **kwargs):
51
self._actions.append(('_real_re_compile',
53
return super(InstrumentedLazyRegex, self)._real_re_compile(
57
class TestLazyRegex(tests.TestCase):
59
def test_lazy_compile(self):
60
"""Make sure that LazyRegex objects compile at the right time"""
62
InstrumentedLazyRegex.use_actions(actions)
64
pattern = InstrumentedLazyRegex(args=('foo',))
65
actions.append(('created regex', 'foo'))
66
# This match call should compile the regex and go through __getattr__
68
# But a further call should not go through __getattr__ because it has
72
self.assertEqual([('created regex', 'foo'),
73
('__getattr__', 'match'),
74
('_real_re_compile', ('foo',), {}),
77
def test_bad_pattern(self):
78
"""Ensure lazy regex handles bad patterns cleanly."""
79
p = lazy_regex.lazy_compile('RE:[')
80
# As p.match is lazy, we make it into a lambda so its handled
81
# by assertRaises correctly.
82
e = self.assertRaises(lazy_regex.InvalidPattern, lambda: p.match('foo'))
83
# Expect either old or new form of error message
84
self.assertContainsRe(e.msg, '^"RE:\\[" '
85
'(unexpected end of regular expression'
86
'|unterminated character set at position 3)$')
89
class TestLazyCompile(tests.TestCase):
91
def test_simple_acts_like_regex(self):
92
"""Test that the returned object has basic regex like functionality"""
93
pattern = lazy_regex.lazy_compile('foo')
94
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
95
self.assertTrue(pattern.match('foo'))
96
self.assertIs(None, pattern.match('bar'))
98
def test_extra_args(self):
99
"""Test that extra arguments are also properly passed"""
100
pattern = lazy_regex.lazy_compile('foo', re.I)
101
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
102
self.assertTrue(pattern.match('foo'))
103
self.assertTrue(pattern.match('Foo'))
105
def test_findall(self):
106
pattern = lazy_regex.lazy_compile('fo*')
107
self.assertEqual(['f', 'fo', 'foo', 'fooo'],
108
pattern.findall('f fo foo fooo'))
110
def test_finditer(self):
111
pattern = lazy_regex.lazy_compile('fo*')
112
matches = [(m.start(), m.end(), m.group())
113
for m in pattern.finditer('foo bar fop')]
114
self.assertEqual([(0, 3, 'foo'), (8, 10, 'fo')], matches)
116
def test_match(self):
117
pattern = lazy_regex.lazy_compile('fo*')
118
self.assertIs(None, pattern.match('baz foo'))
119
self.assertEqual('fooo', pattern.match('fooo').group())
121
def test_search(self):
122
pattern = lazy_regex.lazy_compile('fo*')
123
self.assertEqual('foo', pattern.search('baz foo').group())
124
self.assertEqual('fooo', pattern.search('fooo').group())
126
def test_split(self):
127
pattern = lazy_regex.lazy_compile('[,;]+')
128
self.assertEqual(['x', 'y', 'z'], pattern.split('x,y;z'))
130
def test_pickle(self):
131
# When pickling, just compile the regex.
132
# Sphinx, which we use for documentation, pickles
133
# some compiled regexes.
134
lazy_pattern = lazy_regex.lazy_compile('[,;]+')
135
pickled = pickle.dumps(lazy_pattern)
136
unpickled_lazy_pattern = pickle.loads(pickled)
137
self.assertEqual(['x', 'y', 'z'],
138
unpickled_lazy_pattern.split('x,y;z'))
141
class TestInstallLazyCompile(tests.TestCase):
142
"""Tests for lazy compiled regexps.
144
Other tests, and breezy in general, count on the lazy regexp compiler
145
being installed, and this is done by loading breezy. So these tests
146
assume it is installed, and leave it installed when they're done.
149
def test_install(self):
150
# Don't count on it being present
151
lazy_regex.install_lazy_compile()
152
pattern = re.compile('foo')
153
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
155
def test_reset(self):
156
lazy_regex.reset_compile()
157
self.addCleanup(lazy_regex.install_lazy_compile)
158
pattern = re.compile('foo')
159
self.assertFalse(isinstance(pattern, lazy_regex.LazyRegex),
160
'lazy_regex.reset_compile() did not restore the original'
161
' compile() function %s' % (type(pattern),))
162
# but the returned object should still support regex operations
163
m = pattern.match('foo')
164
self.assertEqual('foo', m.group())