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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
'''Helper classes and functions'''
import gc
import sys
import unittest
# This version avoids explicit import in order to adapt to the
# import decision of the main module.
# This should work with every compatible library.
# Replaces the QtGui and QtCore versions as well.
class UsesQApplication(unittest.TestCase):
'''Helper class to provide Q(Core|Gui|)Application instances
Just connect or call self.exit_app_cb. When called, will ask
self.app to exit.
'''
def setUp(self):
'''Creates the QApplication instance'''
module = sys.modules[sorted(_ for _ in sys.modules
if _.endswith((".QtCore", ".QtGui", ".QtWidgets")))[-1]]
found = module.__name__.rsplit(".")[-1]
cls = getattr(module, {"QtWidgets": "QApplication",
"QtGui": "QGuiApplication",
"QtCore": "QCoreApplication"}[found])
# Simple way of making instance a singleton
super().setUp()
self.app = cls.instance() or cls([])
def tearDown(self):
'''Deletes the reference owned by self'''
del self.app
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
super().tearDown()
def exit_app_cb(self):
'''Quits the application'''
self.app.exit(0)
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