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Diffstat (limited to 'sources/pyside6/tests/QtWidgets/keep_reference_test.py')
-rw-r--r-- | sources/pyside6/tests/QtWidgets/keep_reference_test.py | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtWidgets/keep_reference_test.py b/sources/pyside6/tests/QtWidgets/keep_reference_test.py new file mode 100644 index 000000000..1c634c396 --- /dev/null +++ b/sources/pyside6/tests/QtWidgets/keep_reference_test.py @@ -0,0 +1,109 @@ +#!/usr/bin/env python + +############################################################################# +## +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: https://www.qt.io/licensing/ +## +## This file is part of the test suite of Qt for Python. +## +## $QT_BEGIN_LICENSE:GPL-EXCEPT$ +## 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. +## +## $QT_END_LICENSE$ +## +############################################################################# + +import os +import sys +import unittest + +sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) +from init_paths import init_test_paths +init_test_paths(False) + +from sys import getrefcount +from helper.usesqapplication import UsesQApplication +from PySide6.QtCore import * +from PySide6.QtWidgets import QTableView + +class TestModel(QAbstractTableModel): + def __init__(self, parent=None): + QAbstractTableModel.__init__(self, parent) + def rowCount(self, parent): + return 0 + def columnCount(self, parent): + return 0 + def data(self, index, role): + return None + +class KeepReferenceTest(UsesQApplication): + + def testModelWithoutParent(self): + view = QTableView() + model = TestModel() + view.setModel(model) + samemodel = view.model() + self.assertEqual(model, samemodel) + + def testModelWithParent(self): + view = QTableView() + model = TestModel(None) + view.setModel(model) + samemodel = view.model() + self.assertEqual(model, samemodel) + + def testReferenceCounting(self): + '''Tests reference count of model object referred by view objects.''' + model1 = TestModel() + refcount1 = getrefcount(model1) + view1 = QTableView() + view1.setModel(model1) + self.assertEqual(getrefcount(view1.model()), refcount1 + 1) + + view2 = QTableView() + view2.setModel(model1) + self.assertEqual(getrefcount(view2.model()), refcount1 + 2) + + model2 = TestModel() + view2.setModel(model2) + self.assertEqual(getrefcount(view1.model()), refcount1 + 1) + + def testReferenceCountingWhenDeletingReferrer(self): + '''Tests reference count of model object referred by deceased view object.''' + model = TestModel() + refcount1 = getrefcount(model) + view = QTableView() + view.setModel(model) + self.assertEqual(getrefcount(view.model()), refcount1 + 1) + + del view + self.assertEqual(getrefcount(model), refcount1) + + def testReferreedObjectSurvivalAfterContextEnd(self): + '''Model object assigned to a view object must survive after getting out of context.''' + def createModelAndSetToView(view): + model = TestModel() + model.setObjectName('created model') + view.setModel(model) + view = QTableView() + createModelAndSetToView(view) + model = view.model() + +if __name__ == '__main__': + unittest.main() + |