1 files changed, 84 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtQml/qqmlincubator_incubateWhile.py b/sources/pyside6/tests/QtQml/qqmlincubator_incubateWhile.py
new file mode 100644
index 000000000..12a73e398
--- /dev/null
+++ b/sources/pyside6/tests/QtQml/qqmlincubator_incubateWhile.py
@@ -0,0 +1,84 @@
+#!/usr/bin/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
+
+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 helper.helper import quickview_errorstring
+
+from PySide6.QtCore import QObject, QUrl, Slot, QTimer
+from PySide6.QtGui import QGuiApplication
+from PySide6.QtQml import QQmlIncubationController, VolatileBool
+from PySide6.QtQuick import QQuickView
+
+
+class CustomIncubationController(QObject, QQmlIncubationController):
+    def __init__(self, test):
+        QObject.__init__(self)
+        QQmlIncubationController.__init__(self)
+        self.test = test
+        self.interrupted = False
+
+        # Incubate every 50 milliseconds
+        self.startTimer(50)
+        self.incubationShouldContinue = VolatileBool(True)
+        self.test.assertEqual(self.incubationShouldContinue.get(), True)
+
+    @Slot()
+    def interrupter(self):
+        if not self.interrupted:
+            self.interrupted = True
+            self.incubationShouldContinue.set(False)
+            self.test.assertEqual(self.incubationShouldContinue.get(), False)
+            QTimer.singleShot(0, QGuiApplication.instance().quit)
+
+    def timerEvent(self, ev):
+        # Incubate items for 2000 milliseconds, or until the volatile bool is set to false.
+        self.incubateWhile(self.incubationShouldContinue, 2000)
+
+
+class TestBug(unittest.TestCase):
+    def testIncubateWhileCall(self):
+        app = QGuiApplication(sys.argv)
+        view = QQuickView()
+        controller = CustomIncubationController(self)
+        view.engine().setIncubationController(controller)
+        view.setResizeMode(QQuickView.SizeRootObjectToView)
+        file = Path(__file__).resolve().parent / 'qqmlincubator_incubateWhile.qml'
+        self.assertTrue(file.is_file())
+        view.setSource(QUrl.fromLocalFile(file))
+        self.assertTrue(view.rootObject(), quickview_errorstring(view))
+        view.show()
+
+        root = view.rootObject()
+        # The QML code will issue an interrupt signal after half of its items are loaded.
+        root.shouldInterrupt.connect(controller.interrupter)
+        res = app.exec()
+
+        itemsToCreate = root.property("itemsToCreate")
+        loadedItems = root.property("loadedItems")
+        self.assertEqual(loadedItems, itemsToCreate / 2)
+
+        # Finish incubating the remaining items.
+        controller.incubateFor(1000)
+        loadedItems = root.property("loadedItems")
+        self.assertEqual(loadedItems, itemsToCreate)
+
+        # Deleting the view before it goes out of scope is required to make sure all child QML
+        # instances are destroyed in the correct order.
+        del view
+        del app
+        # PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
+        gc.collect()
+
+
+if __name__ == '__main__':
+    unittest.main()