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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# This file is part of the Shiboken Python Bindings Generator project.
#
# Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
#
# Contact: PySide team <contact@pyside.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# version 2.1 as published by the Free Software Foundation. Please
# review the following information to ensure the GNU Lesser General
# Public License version 2.1 requirements will be met:
# http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
# #
# 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
# 02110-1301 USA
import unittest
from sample import ObjectType
from sample import ObjectView
from sample import ObjectModel
class ObjTest(unittest.TestCase):
def test_cyclic_dependency_withParent(self):
"""Create 2 objects with a cyclic dependency, so that they can
only be removed by the garbage collector, and then invoke the
garbage collector in a different thread.
"""
import gc
class CyclicChildObject(ObjectType):
def __init__(self, parent):
super(CyclicChildObject, self).__init__(parent)
self._parent = parent
class CyclicObject(ObjectType):
def __init__(self):
super(CyclicObject, self).__init__()
CyclicChildObject(self)
# turn off automatic garbage collection, to be able to trigger it
# at the 'right' time
gc.disable()
alive = lambda :sum(isinstance(o, CyclicObject) for o in gc.get_objects() )
#
# first proof that the wizard is only destructed by the garbage
# collector
#
cycle = CyclicObject()
self.assertTrue(alive())
del cycle
self.assertTrue(alive())
gc.collect()
self.assertFalse(alive())
def test_cyclic_dependency_withKeepRef(self):
"""Create 2 objects with a cyclic dependency, so that they can
only be removed by the garbage collector, and then invoke the
garbage collector in a different thread.
"""
import gc
class CyclicChildObject(ObjectView):
def __init__(self, model):
super(CyclicChildObject, self).__init__(None)
self.setModel(model)
class CyclicObject(ObjectModel):
def __init__(self):
super(CyclicObject, self).__init__()
self._view = CyclicChildObject(self)
# turn off automatic garbage collection, to be able to trigger it
# at the 'right' time
gc.disable()
alive = lambda :sum(isinstance(o, CyclicObject) for o in gc.get_objects() )
#
# first proof that the wizard is only destructed by the garbage
# collector
#
cycle = CyclicObject()
self.assertTrue(alive())
del cycle
self.assertTrue(alive())
gc.collect()
self.assertFalse(alive())
if __name__ == '__main__':
unittest.main()
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