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#!/usr/bin/env python
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
"""Tests covering signal emission and receiving to python slots"""
import gc
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, Slot
from helper.usesqcoreapplication 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
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
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
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
m.emit(SIGNAL("foo2()"))
self.assertEqual(m._slotCalledCount, 2)
if __name__ == '__main__':
unittest.main()
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