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#############################################################################
##
## Copyright (C) 2017 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 unittest
import PySide2
# This test tests the new "macro" feature of qApp.
# It also uses the qApp variable to finish the instance and start over.
class qAppMacroTest(unittest.TestCase):
def test_qApp_is_like_a_macro_and_can_restart(self):
from PySide2 import QtCore
try:
from PySide2 import QtGui, QtWidgets
except ImportError:
QtWidgets = QtGui = QtCore
# qApp is in the builtins
qApp
# and also in certain PySide modules
QtCore.qApp, QtGui.qApp, QtWidgets.qApp
# and they are all the same
self.assertTrue(qApp is QtCore.qApp is QtGui.qApp is QtWidgets.qApp)
# and the type is NoneType, but it is not None (cannot work)
self.assertTrue(type(qApp) is type(None))
self.assertTrue(qApp is not None)
# now we create an application for all cases
classes = (QtCore.QCoreApplication,
QtGui.QGuiApplication,
QtWidgets.QApplication)
for klass in classes:
print("created", klass([]))
del __builtins__.qApp
print("deleted qApp")
# creating without deletion raises:
QtCore.QCoreApplication([])
with self.assertRaises(RuntimeError):
QtCore.QCoreApplication([])
# assigning qApp is obeyed
QtCore.qApp = 42
del __builtins__.qApp
self.assertEqual(QtCore.qApp, 42)
self.assertNotEqual(__builtins__, 42)
# delete it and it re-appears
del QtCore.qApp
QtCore.QCoreApplication([])
self.assertEqual(QtCore.QCoreApplication.instance(), QtCore.qApp)
# and they are again all the same
self.assertTrue(qApp is QtCore.qApp is QtGui.qApp is QtWidgets.qApp)
if __name__ == '__main__':
unittest.main()
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