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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 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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+'''Connecting lambda to signals'''
+
+import sys
+import unittest
+
+from PySide2.QtCore import QObject, SIGNAL, QProcess
+
+from helper import UsesQCoreApplication
+
+
+class Dummy(QObject):
+
+ def __init__(self, *args):
+ super(Dummy, self).__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()