1#!/usr/bin/env python
2
3#############################################################################
4##
5## Copyright (C) 2016 The Qt Company Ltd.
6## Contact: https://www.qt.io/licensing/
7##
8## This file is part of the test suite of Qt for Python.
9##
10## $QT_BEGIN_LICENSE:GPL-EXCEPT$
11## Commercial License Usage
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17## information use the contact form at https://www.qt.io/contact-us.
18##
19## GNU General Public License Usage
20## Alternatively, this file may be used under the terms of the GNU
21## General Public License version 3 as published by the Free Software
22## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
23## included in the packaging of this file. Please review the following
24## information to ensure the GNU General Public License requirements will
25## be met: https://www.gnu.org/licenses/gpl-3.0.html.
26##
27## $QT_END_LICENSE$
28##
29#############################################################################
30
31"""Tests covering signal emission and receiving to python slots"""
32
33import os
34import sys
35import unittest
36
37sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
38from init_paths import init_test_paths
39init_test_paths(False)
40
41from PySide2.QtCore import QObject, SIGNAL, Slot
42from helper.usesqcoreapplication import UsesQCoreApplication
43
44class MyObject(QObject):
45    def __init__(self, parent=None):
46        QObject.__init__(self, parent)
47        self._slotCalledCount = 0
48
49    # this '@Slot()' is needed to get the right sort order in testSharedSignalEmission.
50    # For some reason, it also makes the tests actually work!
51    @Slot()
52    def mySlot(self):
53        self._slotCalledCount = self._slotCalledCount + 1
54
55
56class StaticMetaObjectTest(UsesQCoreApplication):
57
58    def testSignalPropagation(self):
59        o = MyObject()
60        o2 = MyObject()
61
62        # SIGNAL foo not created yet
63        self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
64
65        o.connect(SIGNAL("foo()"), o2.mySlot)
66        # SIGNAL foo create after connect
67        self.assertTrue(o.metaObject().indexOfSignal("foo()") > 0)
68
69        # SIGNAL does not propagate to others objects of the same type
70        self.assertEqual(o2.metaObject().indexOfSignal("foo()"), -1)
71
72        del o
73        del o2
74        o = MyObject()
75        # The SIGNAL was destroyed with old objects
76        self.assertEqual(o.metaObject().indexOfSignal("foo()"), -1)
77
78
79    def testSharedSignalEmission(self):
80        o = QObject()
81        m = MyObject()
82
83        o.connect(SIGNAL("foo2()"), m.mySlot)
84        m.connect(SIGNAL("foo2()"), m.mySlot)
85        o.emit(SIGNAL("foo2()"))
86        self.assertEqual(m._slotCalledCount, 1)
87        del o
88        m.emit(SIGNAL("foo2()"))
89        self.assertEqual(m._slotCalledCount, 2)
90
91if __name__ == '__main__':
92    unittest.main()
93