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#!/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.
##
## $QT_END_LICENSE$
##
#############################################################################
'''Connecting lambda to signals'''
import os
import sys
import unittest
from pathlib import Path
sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
from init_paths import init_test_paths
init_test_paths(False)
from PySide6.QtCore import QObject, SIGNAL, QProcess
from helper.usesqcoreapplication import UsesQCoreApplication
class Dummy(QObject):
def __init__(self, *args):
super().__init__(*args)
class BasicCase(unittest.TestCase):
def testSimplePythonSignalNoArgs(self):
#Connecting a lambda to a simple python signal without arguments
obj = Dummy()
QObject.connect(obj, SIGNAL('foo()'),
lambda: setattr(obj, 'called', True))
obj.emit(SIGNAL('foo()'))
self.assertTrue(obj.called)
def testSimplePythonSignal(self):
#Connecting a lambda to a simple python signal witharguments
obj = Dummy()
arg = 42
QObject.connect(obj, SIGNAL('foo(int)'),
lambda x: setattr(obj, 'arg', 42))
obj.emit(SIGNAL('foo(int)'), arg)
self.assertEqual(obj.arg, arg)
class QtSigLambda(UsesQCoreApplication):
qapplication = True
def testNoArgs(self):
'''Connecting a lambda to a signal without arguments'''
proc = QProcess()
dummy = Dummy()
QObject.connect(proc, SIGNAL('started()'),
lambda: setattr(dummy, 'called', True))
proc.start(sys.executable, ['-c', '""'])
proc.waitForFinished()
self.assertTrue(dummy.called)
def testWithArgs(self):
'''Connecting a lambda to a signal with arguments'''
proc = QProcess()
dummy = Dummy()
QObject.connect(proc, SIGNAL('finished(int)'),
lambda x: setattr(dummy, 'called', x))
proc.start(sys.executable, ['-c', '""'])
proc.waitForFinished()
self.assertEqual(dummy.called, proc.exitCode())
if __name__ == '__main__':
unittest.main()
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