1 files changed, 103 insertions, 0 deletions
diff --git a/sources/pyside2/tests/QtWidgets/keep_reference_test.py b/sources/pyside2/tests/QtWidgets/keep_reference_test.py
new file mode 100644
index 000000000..17502c267
--- /dev/null
+++ b/sources/pyside2/tests/QtWidgets/keep_reference_test.py
@@ -0,0 +1,103 @@
+#!/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 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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+import unittest
+
+from sys import getrefcount
+from helper import UsesQApplication
+from PySide2.QtCore import *
+from PySide2.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()
+