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# Copyright (C) 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Test that lazy regexes are not compiled right away"""
import re
from bzrlib import (
lazy_regex,
tests,
)
class InstrumentedLazyRegex(lazy_regex.LazyRegex):
"""Keep track of actions on the lazy regex"""
_actions = []
@classmethod
def use_actions(cls, actions):
cls._actions = actions
def __getattr__(self, attr):
self._actions.append(('__getattr__', attr))
return super(InstrumentedLazyRegex, self).__getattr__(attr)
def _real_re_compile(self, *args, **kwargs):
self._actions.append(('_real_re_compile',
args, kwargs))
return super(InstrumentedLazyRegex, self)._real_re_compile(*args, **kwargs)
class TestLazyRegex(tests.TestCase):
def test_lazy_compile(self):
"""Make sure that LazyRegex objects compile at the right time"""
actions = []
InstrumentedLazyRegex.use_actions(actions)
pattern = InstrumentedLazyRegex(args=('foo',))
actions.append(('created regex', 'foo'))
# This match call should compile the regex and go through __getattr__
pattern.match('foo')
# But a further call should not go through __getattr__ because it has
# been bound locally.
pattern.match('foo')
self.assertEqual([('created regex', 'foo'),
('__getattr__', 'match'),
('_real_re_compile', ('foo',), {}),
], actions)
class TestLazyCompile(tests.TestCase):
def test_simple_acts_like_regex(self):
"""Test that the returned object has basic regex like functionality"""
pattern = lazy_regex.lazy_compile('foo')
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
self.assertTrue(pattern.match('foo'))
self.assertIs(None, pattern.match('bar'))
def test_extra_args(self):
"""Test that extra arguments are also properly passed"""
pattern = lazy_regex.lazy_compile('foo', re.I)
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
self.assertTrue(pattern.match('foo'))
self.assertTrue(pattern.match('Foo'))
def test_findall(self):
pattern = lazy_regex.lazy_compile('fo*')
self.assertEqual(['f', 'fo', 'foo', 'fooo'],
pattern.findall('f fo foo fooo'))
def test_finditer(self):
pattern = lazy_regex.lazy_compile('fo*')
matches = [(m.start(), m.end(), m.group())
for m in pattern.finditer('foo bar fop')]
self.assertEqual([(0, 3, 'foo'), (8, 10, 'fo')], matches)
def test_match(self):
pattern = lazy_regex.lazy_compile('fo*')
self.assertIs(None, pattern.match('baz foo'))
self.assertEqual('fooo', pattern.match('fooo').group())
def test_search(self):
pattern = lazy_regex.lazy_compile('fo*')
self.assertEqual('foo', pattern.search('baz foo').group())
self.assertEqual('fooo', pattern.search('fooo').group())
def test_split(self):
pattern = lazy_regex.lazy_compile('[,;]*')
self.assertEqual(['x', 'y', 'z'], pattern.split('x,y;z'))
class TestInstallLazyCompile(tests.TestCase):
def setUp(self):
super(TestInstallLazyCompile, self).setUp()
self.addCleanup(lazy_regex.reset_compile)
def test_install(self):
lazy_regex.install_lazy_compile()
pattern = re.compile('foo')
self.assertIsInstance(pattern, lazy_regex.LazyRegex)
def test_reset(self):
lazy_regex.install_lazy_compile()
lazy_regex.reset_compile()
pattern = re.compile('foo')
self.failIf(isinstance(pattern, lazy_regex.LazyRegex),
'lazy_regex.reset_compile() did not restore the original'
' compile() function %s' % (type(pattern),))
# but the returned object should still support regex operations
m = pattern.match('foo')
self.assertEqual('foo', m.group())
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