1 files changed, 115 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtCore/qobject_inherits_test.py b/sources/pyside6/tests/QtCore/qobject_inherits_test.py
new file mode 100644
index 000000000..0bd4fba75
--- /dev/null
+++ b/sources/pyside6/tests/QtCore/qobject_inherits_test.py
@@ -0,0 +1,115 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+'''Test cases for QObject methods'''
+
+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, QTimer
+from PySide6.QtWidgets import QApplication, QLabel, QVBoxLayout
+
+is_alive = None
+
+
+class InheritsCase(unittest.TestCase):
+    '''Test case for QObject.inherits'''
+
+    def testCppInheritance(self):
+        # QObject.inherits() for c++ classes
+        # A class inherits itself
+        self.assertTrue(QObject().inherits('QObject'))
+
+    def testPythonInheritance(self):
+        # QObject.inherits() for python classes
+
+        class Dummy(QObject):
+            # Dummy class
+            pass
+
+        self.assertTrue(Dummy().inherits('QObject'))
+        self.assertTrue(Dummy().inherits('Dummy'))
+        self.assertTrue(not Dummy().inherits('FooBar'))
+
+    def testPythonMultiInheritance(self):
+        # QObject.inherits() for multiple inheritance
+        # QObject.inherits(classname) should fail if classname isn't a
+        # QObject subclass
+
+        class Parent(object):
+            # Dummy parent
+            pass
+
+        class Dummy(QObject, Parent):
+            # Dummy class
+            pass
+
+        self.assertTrue(Dummy().inherits('QObject'))
+        self.assertTrue(not Dummy().inherits('Parent'))
+
+    def testSetAttributeBeforeCallingInitOnQObjectDerived(self):
+        '''Test for bug #428.'''
+        class DerivedObject(QObject):
+            def __init__(self):
+                self.member = 'member'
+                super().__init__()
+        obj0 = DerivedObject()
+        # The second instantiation of DerivedObject will generate an exception
+        # that will not come to surface immediately.
+        obj1 = DerivedObject()
+        # The mere calling of the object method causes
+        # the exception to "reach the surface".
+        obj1.objectName()
+
+    def testMultipleInheritance(self):
+        def declareClass():
+            class Foo(object, QObject):
+                pass
+
+        self.assertRaises(TypeError, declareClass)
+
+    # PYSIDE-11:
+    #   The takeOwnership() method was relying that the SbkObject
+    #   had a converter, which it's not the case when multiple
+    #   inheritance is used.
+    #   The deleteLater() method uses the takeOwnership() to give
+    #   control of the object to C++, so it can be remove once
+    #   the destructor is called.
+    #   The solution was to add a default case when the object
+    #   is null under the pythonTypeIsValueType() method in shiboken.
+    def testDeleteMultipleInheritance(self):
+        app = QApplication(sys.argv)
+
+        class DerivedLabel(QLabel, QObject):
+            def __del__(self):
+                global is_alive
+                is_alive = False
+
+        global is_alive
+        child = DerivedLabel('Hello')
+        is_alive = True
+        parent = QVBoxLayout()
+        parent.addWidget(child)
+        parent.removeWidget(child)
+        child.deleteLater()
+        self.assertTrue(is_alive)
+        del child
+        # PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
+        gc.collect()
+        self.assertTrue(is_alive)
+        QTimer.singleShot(100, app.quit)
+        app.exec()
+        # PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
+        gc.collect()
+        self.assertFalse(is_alive)
+
+
+if __name__ == '__main__':
+    unittest.main()