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diff --git a/sources/pyside2/tests/QtCore/qobject_parent_test.py b/sources/pyside2/tests/QtCore/qobject_parent_test.py
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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 PySide2.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## 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 parent-child relationship'''
+
+import unittest
+from sys import getrefcount
+
+from PySide2.QtCore import *
+
+class ParentRefCountCase(unittest.TestCase):
+ '''Test case for the refcount changes of setParent'''
+
+ def setUp(self):
+ #Acquire resources
+ self.parent = QObject()
+ self.child = QObject()
+
+ def tearDown(self):
+ #Release resources
+ del self.child
+ del self.parent
+
+ def testSetParent(self):
+ #QObject.setParent() refcount changes
+ self.assertEqual(getrefcount(self.child), 2)
+ self.child.setParent(self.parent)
+ self.assertEqual(getrefcount(self.child), 3)
+
+ def testSetParentTwice(self):
+ self.assertEqual(getrefcount(self.child), 2)
+ self.child.setParent(self.parent)
+ self.assertEqual(getrefcount(self.child), 3)
+ self.child.setParent(self.parent)
+ self.assertEqual(getrefcount(self.child), 3)
+
+ def testConstructor(self):
+ #QObject(QObject) refcount changes
+ child = QObject(self.parent)
+ self.assertEqual(getrefcount(child), 3)
+
+class ParentCase(unittest.TestCase):
+ '''Small collection of tests related to parent-child relationship'''
+
+ def testSetParent(self):
+ #QObject.setParent()
+ parent = QObject()
+ child = QObject()
+ child.setParent(parent)
+
+ self.assertEqual(parent, child.parent())
+
+ def testParentConstructor(self):
+ #QObject(parent)
+ parent = QObject()
+ child = QObject(parent)
+
+ self.assertEqual(parent, child.parent())
+
+ orig_repr = repr(child)
+ del child
+ self.assertEqual(orig_repr, repr(parent.children()[0]))
+
+ def testChildren(self):
+ #QObject.children()
+ parent = QObject()
+ children = [QObject(parent) for x in range(25)]
+
+ self.assertEqual(parent.children(), children)
+
+ def testFindChild(self):
+ #QObject.findChild() with all QObject
+ parent = QObject()
+ name = 'object%d'
+ children = [QObject(parent) for i in range(20)]
+
+ for i, child in enumerate(children):
+ child.setObjectName(name % i)
+
+ for i, child in enumerate(children):
+ self.assertEqual(child, parent.findChild(QObject, name % i))
+
+ def testFindChildWithoutName(self):
+ parent = QObject()
+ name = 'object%d'
+ children = [QObject(parent) for i in range(20)]
+
+ for i, child in enumerate(children):
+ child.setObjectName(name % i)
+
+ child = parent.findChild(QObject)
+ self.assertTrue(isinstance(child, QObject))
+
+ def testFindChildren(self):
+ #QObject.findChildren() with all QObject
+ parent = QObject()
+ target_name = 'foo'
+ children = [QTimer(parent) for i in range(20)]
+ children.extend([QObject(parent) for i in range(20)])
+
+ for i, child in enumerate(children):
+ if i % 5 == 0:
+ child.setObjectName(target_name)
+ else:
+ child.setObjectName(str(i))
+
+ # Emulates findChildren with the intended outcome
+ target_children = [x for x in children if x.objectName() == target_name]
+ test_children = parent.findChildren(QObject, target_name)
+ self.assertEqual(target_children, test_children)
+
+ # test findChildren default value
+ res = parent.findChildren(QTimer)
+ self.assertEqual(len(res), 20)
+
+ # test findChildre with a regex
+ res = parent.findChildren(QObject, QRegExp("^fo+"))
+ self.assertEqual(res, test_children)
+
+
+ def testParentEquality(self):
+ #QObject.parent() == parent
+ parent = QObject()
+ child = QObject(parent)
+ self.assertEqual(parent, child.parent())
+
+
+class TestParentOwnership(unittest.TestCase):
+ '''Test case for Parent/Child object ownership'''
+
+ def testParentDestructor(self):
+ parent = QObject()
+ self.assertEqual(getrefcount(parent), 2)
+
+ child = QObject(parent)
+ self.assertEqual(getrefcount(child), 3)
+ self.assertEqual(getrefcount(parent), 2)
+
+ del parent
+ self.assertEqual(getrefcount(child), 2)
+
+ # this will fail because parent deleted child cpp object
+ self.assertRaises(RuntimeError, lambda :child.objectName())
+
+ # test parent with multiples children
+ def testMultipleChildren(self):
+ o = QObject()
+ self.assertEqual(getrefcount(o), 2)
+
+ c = QObject(o)
+ self.assertEqual(getrefcount(c), 3)
+ self.assertEqual(getrefcount(o), 2)
+
+ c2 = QObject(o)
+ self.assertEqual(getrefcount(o), 2)
+ self.assertEqual(getrefcount(c), 3)
+ self.assertEqual(getrefcount(c2), 3)
+
+ del o
+ self.assertEqual(getrefcount(c), 2)
+ self.assertEqual(getrefcount(c2), 2)
+
+ # this will fail because parent deleted child cpp object
+ self.assertRaises(RuntimeError, lambda :c.objectName())
+ self.assertRaises(RuntimeError, lambda :c2.objectName())
+
+ # test recursive parent
+ def testRecursiveParent(self):
+ o = QObject()
+ self.assertEqual(getrefcount(o), 2)
+
+ c = QObject(o)
+ self.assertEqual(getrefcount(c), 3)
+ self.assertEqual(getrefcount(o), 2)
+
+ c2 = QObject(c)
+ self.assertEqual(getrefcount(o), 2)
+ self.assertEqual(getrefcount(c), 3)
+ self.assertEqual(getrefcount(c2), 3)
+
+ del o
+ self.assertEqual(getrefcount(c), 2)
+ self.assertEqual(getrefcount(c2), 2)
+
+ # this will fail because parent deleted child cpp object
+ self.assertRaises(RuntimeError, lambda :c.objectName())
+ self.assertRaises(RuntimeError, lambda :c2.objectName())
+
+ # test parent transfer
+ def testParentTransfer(self):
+ o = QObject()
+ self.assertEqual(getrefcount(o), 2)
+
+ c = QObject()
+ self.assertEqual(getrefcount(c), 2)
+
+ c.setParent(o)
+ self.assertEqual(getrefcount(c), 3)
+
+ c.setParent(None)
+ self.assertEqual(getrefcount(c), 2)
+
+ del c
+ del o
+
+
+class ExtQObject(QObject):
+ def __init__(self):
+ QObject.__init__(self)
+
+class ReparentingTest(unittest.TestCase):
+ '''Test cases for reparenting'''
+
+ def testParentedQObjectIdentity(self):
+ object_list = []
+ parent = QObject()
+ for i in range(3):
+ obj = QObject()
+ object_list.append(obj)
+ obj.setParent(parent)
+ for child in parent.children():
+ self.assertTrue(child in object_list)
+
+ def testParentedExtQObjectType(self):
+ object_list = []
+ parent = QObject()
+ for i in range(3):
+ obj = ExtQObject()
+ object_list.append(obj)
+ obj.setParent(parent)
+ for orig, child in zip(object_list, parent.children()):
+ self.assertEqual(type(orig), type(child))
+
+ def testReparentedQObjectIdentity(self):
+ object_list = []
+ old_parent = QObject()
+ new_parent = QObject()
+ for i in range(3):
+ obj = QObject()
+ object_list.append(obj)
+ obj.setParent(old_parent)
+ for obj in object_list:
+ obj.setParent(new_parent)
+ for child in new_parent.children():
+ self.assertTrue(child in object_list)
+
+ def testReparentedExtQObjectType(self):
+ object_list = []
+ old_parent = QObject()
+ new_parent = QObject()
+ for i in range(3):
+ obj = ExtQObject()
+ object_list.append(obj)
+ obj.setParent(old_parent)
+ for obj in object_list:
+ obj.setParent(new_parent)
+ for orig, child in zip(object_list, new_parent.children()):
+ self.assertEqual(type(orig), type(child))
+
+
+if __name__ == '__main__':
+ unittest.main()