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# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of Logilab-Common.
#
# Logilab-Common is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# Logilab-Common 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with Logilab-Common. If not, see <http://www.gnu.org/licenses/>.
"""unit tests for selectors mechanism"""
import gc
import logging
import sys
from contextlib import contextmanager
from logilab.common.testlib import (
TestCase,
unittest_main,
)
from logilab.common.registry import (
Predicate,
AndPredicate,
OrPredicate,
wrap_predicates,
RegistryStore,
RegistrableInstance,
)
logging.basicConfig(level=logging.ERROR)
class _1_(Predicate):
def __call__(self, *args, **kwargs):
return 1
class _0_(Predicate):
def __call__(self, *args, **kwargs):
return 0
def _2_(*args, **kwargs):
return 2
class SelectorsTC(TestCase):
def test_basic_and(self):
selector = _1_() & _1_()
self.assertEqual(selector(None), 2)
selector = _1_() & _0_()
self.assertEqual(selector(None), 0)
selector = _0_() & _1_()
self.assertEqual(selector(None), 0)
def test_basic_or(self):
selector = _1_() | _1_()
self.assertEqual(selector(None), 1)
selector = _1_() | _0_()
self.assertEqual(selector(None), 1)
selector = _0_() | _1_()
self.assertEqual(selector(None), 1)
selector = _0_() | _0_()
self.assertEqual(selector(None), 0)
def test_selector_and_function(self):
selector = _1_() & _2_
self.assertEqual(selector(None), 3)
selector = _2_ & _1_()
self.assertEqual(selector(None), 3)
def test_three_and(self):
selector = _1_() & _1_() & _1_()
self.assertEqual(selector(None), 3)
selector = _1_() & _0_() & _1_()
self.assertEqual(selector(None), 0)
selector = _0_() & _1_() & _1_()
self.assertEqual(selector(None), 0)
def test_three_or(self):
selector = _1_() | _1_() | _1_()
self.assertEqual(selector(None), 1)
selector = _1_() | _0_() | _1_()
self.assertEqual(selector(None), 1)
selector = _0_() | _1_() | _1_()
self.assertEqual(selector(None), 1)
selector = _0_() | _0_() | _0_()
self.assertEqual(selector(None), 0)
def test_composition(self):
selector = (_1_() & _1_()) & (_1_() & _1_())
self.assertIsInstance(selector, AndPredicate)
self.assertEqual(len(selector.selectors), 4)
self.assertEqual(selector(None), 4)
selector = (_1_() & _0_()) | (_1_() & _1_())
self.assertIsInstance(selector, OrPredicate)
self.assertEqual(len(selector.selectors), 2)
self.assertEqual(selector(None), 2)
def test_search_selectors(self):
sel = _1_()
self.assertIs(sel.search_selector(_1_), sel)
csel = AndPredicate(sel, Predicate())
self.assertIs(csel.search_selector(_1_), sel)
csel = AndPredicate(Predicate(), sel)
self.assertIs(csel.search_selector(_1_), sel)
self.assertIs(csel.search_selector((AndPredicate, OrPredicate)), csel)
self.assertIs(csel.search_selector((OrPredicate, AndPredicate)), csel)
self.assertIs(csel.search_selector((_1_, _0_)), sel)
self.assertIs(csel.search_selector((_0_, _1_)), sel)
def test_inplace_and(self):
selector = _1_()
selector &= _1_()
selector &= _1_()
self.assertEqual(selector(None), 3)
selector = _1_()
selector &= _0_()
selector &= _1_()
self.assertEqual(selector(None), 0)
selector = _0_()
selector &= _1_()
selector &= _1_()
self.assertEqual(selector(None), 0)
selector = _0_()
selector &= _0_()
selector &= _0_()
self.assertEqual(selector(None), 0)
def test_inplace_or(self):
selector = _1_()
selector |= _1_()
selector |= _1_()
self.assertEqual(selector(None), 1)
selector = _1_()
selector |= _0_()
selector |= _1_()
self.assertEqual(selector(None), 1)
selector = _0_()
selector |= _1_()
selector |= _1_()
self.assertEqual(selector(None), 1)
selector = _0_()
selector |= _0_()
selector |= _0_()
self.assertEqual(selector(None), 0)
def test_wrap_selectors(self):
class _temp_(Predicate):
def __call__(self, *args, **kwargs):
return 0
del _temp_ # test weakref
s1 = _1_() & _1_()
s2 = _1_() & _0_()
s3 = _0_() & _1_()
gc.collect()
self.count = 0
def decorate(f, self=self):
def wrapper(*args, **kwargs):
self.count += 1
return f(*args, **kwargs)
return wrapper
wrap_predicates(decorate)
self.assertEqual(s1(None), 2)
self.assertEqual(s2(None), 0)
self.assertEqual(s3(None), 0)
self.assertEqual(self.count, 8)
@contextmanager
def prepended_syspath(path):
sys.path.insert(0, path)
yield
sys.path = sys.path[1:]
class RegistryStoreTC(TestCase):
def test_autoload_modnames(self):
store = RegistryStore()
store.setdefault("zereg")
with prepended_syspath(self.datadir):
store.register_modnames(["regobjects", "regobjects2"])
self.assertEqual(["zereg"], list(store.keys()))
self.assertEqual({"appobject1", "appobject2", "appobject3"}, set(store["zereg"]))
class RegistrableInstanceTC(TestCase):
def test_instance_modulename(self):
obj = RegistrableInstance()
self.assertEqual(obj.__module__, "logilab.common.registry")
# no inheritance
obj = RegistrableInstance(__module__=__name__)
self.assertEqual(obj.__module__, "test_registry")
# with inheritance from another python file
with prepended_syspath(self.datadir):
from regobjects2 import instance, MyRegistrableInstance
instance2 = MyRegistrableInstance(__module__=__name__)
self.assertEqual(instance.__module__, "regobjects2")
self.assertEqual(instance2.__module__, "test_registry")
if __name__ == "__main__":
unittest_main()
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