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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
'''Test cases for Reference count when the object is created in c++ side'''
import gc
import os
import sys
import unittest
import weakref
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)
from PySide6.QtCore import Qt, QPointF
from PySide6.QtGui import QPolygonF
from PySide6.QtWidgets import QApplication, QGraphicsScene, QGraphicsRectItem, QGraphicsPolygonItem, QGraphicsRectItem
from helper.usesqapplication 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()
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
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)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
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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