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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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 QTimer, QObject, Signal
class TestDestroySignal(unittest.TestCase):
def onObjectDestroyed(self, timer):
self.assertTrue(isinstance(timer, QObject))
self._destroyed = True
def testSignal(self):
self._destroyed = False
t = QTimer()
t.destroyed[QObject].connect(self.onObjectDestroyed)
del t
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
# PYSIDE-535: Why do I need to do it twice, here?
gc.collect()
self.assertTrue(self._destroyed)
def testWithParent(self):
self._destroyed = False
p = QTimer()
t = QTimer(p)
t.destroyed[QObject].connect(self.onObjectDestroyed)
del p
# PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
gc.collect()
# PYSIDE-535: Why do I need to do it twice, here?
gc.collect()
self.assertTrue(self._destroyed)
class Foo(QObject):
s = Signal(int)
def __init__(self):
QObject.__init__(self)
sys.stderr.write(f"__init__ {id(self):x}\n")
def __del__(self):
sys.stderr.write(f"__del__ {id(self):x}\n")
def send(self, i):
self.s.emit(i)
# PYSIDE-2201/2328: This crashed until we introduced a weak reference.
class TestDestroyNoConnect(unittest.TestCase):
def testSignalDestroyedMissingReference(self):
# This works since it has one reference more to Foo
Foo().send(43)
# This crashed because we have no reference in the signal.
with self.assertRaises(RuntimeError):
Foo().s.emit(44)
def testSignalDestroyedinConnect(self):
# PYSIDE-2328: Connect to signal of temporary
with self.assertRaises(RuntimeError):
Foo().s.connect(None)
if __name__ == '__main__':
unittest.main()
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