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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
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 ObjectModel, ObjectView
class TestKeepReference(unittest.TestCase):
'''Test case for objects that keep references to other object without
owning them (e.g. model/view relationships).'''
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testReferenceCounting(self):
'''Tests reference count of model-like object referred by view-like objects.'''
model1 = ObjectModel()
refcount1 = sys.getrefcount(model1)
view1 = ObjectView()
view1.setModel(model1)
self.assertEqual(sys.getrefcount(view1.model()), refcount1 + 1)
view2 = ObjectView()
view2.setModel(model1)
self.assertEqual(sys.getrefcount(view2.model()), refcount1 + 2)
model2 = ObjectModel()
view2.setModel(model2)
self.assertEqual(sys.getrefcount(view1.model()), refcount1 + 1)
@unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
def testReferenceCountingWhenDeletingReferrer(self):
'''Tests reference count of model-like object referred by deceased view-like object.'''
model = ObjectModel()
refcount1 = sys.getrefcount(model)
view = ObjectView()
view.setModel(model)
self.assertEqual(sys.getrefcount(view.model()), refcount1 + 1)
del view
self.assertEqual(sys.getrefcount(model), refcount1)
def testReferreedObjectSurvivalAfterContextEnd(self):
'''Model-like object assigned to a view-like object must survive
after get out of context.'''
def createModelAndSetToView(view):
model = ObjectModel()
model.setObjectName('created model')
view.setModel(model)
view = ObjectView()
createModelAndSetToView(view)
model = view.model() # noqa: F841
if __name__ == '__main__':
unittest.main()
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