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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.
##
## $QT_END_LICENSE$
##
#############################################################################
"""Tests covering signal emission and receiving to python slots"""
import unittest
from PySide2.QtCore import QObject, SIGNAL, Slot
from helper import UsesQCoreApplication
class MyObject(QObject):
def __init__(self, parent=None):
QObject.__init__(self, parent)
self._slotCalledCount = 0
# this '@Slot()' is needed to get the right sort order in testSharedSignalEmission.
# For some reason, it also makes the tests actually work!
@Slot()
def mySlot(self):
self._slotCalledCount = self._slotCalledCount + 1
class StaticMetaObjectTest(UsesQCoreApplication):
def testSignalPropagation(self):
o = MyObject()
o2 = MyObject()
# SIGNAL foo not created yet
self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
o.connect(SIGNAL("foo()"), o2.mySlot)
# SIGNAL foo create after connect
self.assertTrue(o.metaObject().indexOfSignal("foo()") > 0)
# SIGNAL does not propagate to others objects of the same type
self.assertEqual(o2.metaObject().indexOfSignal("foo()"), -1)
del o
del o2
o = MyObject()
# The SIGNAL was destroyed with old objects
self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
def testSharedSignalEmission(self):
o = QObject()
m = MyObject()
o.connect(SIGNAL("foo2()"), m.mySlot)
m.connect(SIGNAL("foo2()"), m.mySlot)
o.emit(SIGNAL("foo2()"))
self.assertEqual(m._slotCalledCount, 1)
del o
m.emit(SIGNAL("foo2()"))
self.assertEqual(m._slotCalledCount, 2)
if __name__ == '__main__':
unittest.main()
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