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#############################################################################
##
## Copyright (C) 2016 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the test suite of the Qt for Python project.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################
'''Test cases for Reference count when the object is created in c++ side'''
import unittest
import sys
import weakref
import gc
from PySide2.QtCore import Qt, QPointF
from PySide2.QtGui import QPolygonF
from PySide2.QtWidgets import QApplication, QGraphicsScene, QGraphicsRectItem, QGraphicsPolygonItem, QGraphicsRectItem
from helper import UsesQApplication
destroyedRect = False
destroyedPol = False
def rect_del(o):
global destroyedRect
destroyedRect = True
def pol_del(o):
global destroyedPol
destroyedPol = True
class ReferenceCount(UsesQApplication):
def setUp(self):
super(ReferenceCount, self).setUp()
self.scene = QGraphicsScene()
def tearDown(self):
super(ReferenceCount, self).tearDown()
def beforeTest(self):
points = [QPointF(0, 0), QPointF(100, 100), QPointF(0, 100)]
pol = self.scene.addPolygon(QPolygonF(points))
self.assertTrue(isinstance(pol, QGraphicsPolygonItem))
self.wrp = weakref.ref(pol, pol_del)
#refcount need be 3 because one ref for QGraphicsScene, and one to rect obj
self.assertEqual(sys.getrefcount(pol), 3)
def testReferenceCount(self):
global destroyedRect
global destroyedPol
self.beforeTest()
rect = self.scene.addRect(10.0, 10.0, 10.0, 10.0)
self.assertTrue(isinstance(rect, QGraphicsRectItem))
self.wrr = weakref.ref(rect, rect_del)
#refcount need be 3 because one ref for QGraphicsScene, and one to rect obj
self.assertEqual(sys.getrefcount(rect), 3)
del rect
#not destroyed because one ref continue in QGraphicsScene
self.assertEqual(destroyedRect, False)
self.assertEqual(destroyedPol, False)
del self.scene
#QGraphicsScene was destroyed and this destroy internal ref to rect
self.assertEqual(destroyedRect, True)
self.assertEqual(destroyedPol, True)
if __name__ == '__main__':
unittest.main()
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