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#!/usr/bin/env python
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
'''Tests for destroying the parent'''
import gc
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from shiboken_paths import init_paths
init_paths()
from sample import ObjectType
class DeleteParentTest(unittest.TestCase):
'''Test case for deleting a parent object'''
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testParentDestructor(self):
'''Delete parent object should invalidate child'''
parent = ObjectType()
child = ObjectType()
child.setParent(parent)
refcount_before = sys.getrefcount(child)
del parent
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
self.assertRaises(RuntimeError, child.objectName)
self.assertEqual(sys.getrefcount(child), refcount_before - 1)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testParentDestructorMultipleChildren(self):
'''Delete parent object should invalidate all children'''
parent = ObjectType()
children = [ObjectType() for _ in range(10)]
for child in children:
child.setParent(parent)
del parent
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
for i, child in enumerate(children):
self.assertRaises(RuntimeError, child.objectName)
self.assertEqual(sys.getrefcount(child), 4)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testRecursiveParentDelete(self):
'''Delete parent should invalidate grandchildren'''
parent = ObjectType()
child = ObjectType(parent)
grandchild = ObjectType(child)
del parent
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
self.assertRaises(RuntimeError, child.objectName)
self.assertEqual(sys.getrefcount(child), 2)
self.assertRaises(RuntimeError, grandchild.objectName)
self.assertEqual(sys.getrefcount(grandchild), 2)
if __name__ == '__main__':
unittest.main()
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