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Diffstat (limited to 'sources/pyside6/tests/signals/lambda_test.py')
-rw-r--r-- | sources/pyside6/tests/signals/lambda_test.py | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/sources/pyside6/tests/signals/lambda_test.py b/sources/pyside6/tests/signals/lambda_test.py new file mode 100644 index 000000000..23fcdf5fa --- /dev/null +++ b/sources/pyside6/tests/signals/lambda_test.py @@ -0,0 +1,123 @@ +#!/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 + +'''Connecting lambda to signals''' + +import os +import sys +import unittest +import weakref + +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 QCoreApplication, QObject, Signal, SIGNAL, QProcess + +from helper.usesqapplication import UsesQApplication + + +class Sender(QObject): + void_signal = Signal() + int_signal = Signal(int) + + def __init__(self, parent=None): + super().__init__(parent) + self._delayed_int = 0 + + def emit_void(self): + self.void_signal.emit() + + def emit_int(self, v): + self.int_signal.emit(v) + + +class Receiver(QObject): + + def __init__(self, *args): + super().__init__(*args) + + +class BasicCase(unittest.TestCase): + + def testSimplePythonSignalNoArgs(self): + # Connecting a lambda to a simple python signal without arguments + receiver = Receiver() + sender = Sender() + sender.void_signal.connect(lambda: setattr(receiver, 'called', True)) + sender.emit_void() + self.assertTrue(receiver.called) + + def testSimplePythonSignal(self): + # Connecting a lambda to a simple python signal witharguments + receiver = Receiver() + sender = Sender() + arg = 42 + sender.int_signal.connect(lambda x: setattr(receiver, 'arg', arg)) + sender.emit_int(arg) + self.assertEqual(receiver.arg, arg) + + def testSimplePythonSignalNoArgsString(self): + # Connecting a lambda to a simple python signal without arguments + receiver = Receiver() + sender = Sender() + QObject.connect(sender, SIGNAL('void_signal()'), + lambda: setattr(receiver, 'called', True)) + sender.emit_void() + self.assertTrue(receiver.called) + + def testSimplePythonSignalString(self): + # Connecting a lambda to a simple python signal witharguments + receiver = Receiver() + sender = Sender() + arg = 42 + QObject.connect(sender, SIGNAL('int_signal(int)'), + lambda x: setattr(receiver, 'arg', arg)) + sender.emit_int(arg) + self.assertEqual(receiver.arg, arg) + + +class QtSigLambda(UsesQApplication): + + qapplication = True + + def testWithArgs(self): + '''Connecting a lambda to a signal with and without arguments''' + proc = QProcess() + dummy = Receiver() + proc.started.connect(lambda: setattr(dummy, 'called', True)) + proc.finished.connect(lambda x: setattr(dummy, 'exit_code', x)) + + proc.start(sys.executable, ['-c', '""']) + self.assertTrue(proc.waitForStarted()) + self.assertTrue(proc.waitForFinished()) + + self.assertTrue(dummy.called) + self.assertEqual(dummy.exit_code, proc.exitCode()) + + def testRelease(self): + """PYSIDE-2646: Test whether main thread target slot lambda/methods + (and their captured objects) are released by the signal manager + after a while.""" + + def do_connect(sender): + receiver = Receiver() + sender.void_signal.connect(lambda: setattr(receiver, 'called', True)) + return receiver + + sender = Sender() + receiver = weakref.ref(do_connect(sender)) + sender.emit_void() + self.assertTrue(receiver().called) + del sender + for i in range(3): + if not receiver(): + break + QCoreApplication.processEvents() + self.assertFalse(receiver()) + + +if __name__ == '__main__': + unittest.main() |