1 files changed, 102 insertions, 0 deletions
diff --git a/sources/pyside2/tests/QtCore/duck_punching_test.py b/sources/pyside2/tests/QtCore/duck_punching_test.py
new file mode 100644
index 000000000..c0ee4403d
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+++ b/sources/pyside2/tests/QtCore/duck_punching_test.py
@@ -0,0 +1,102 @@
+#!/usr/bin/python
+
+#############################################################################
+##
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the test suite of PySide2.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 as published by the Free Software
+## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+'''Test case for duck punching new implementations of C++ virtual methods into object instances.'''
+
+import unittest
+import types
+import sys
+from PySide2.QtCore import QObject
+from helper import UsesQCoreApplication
+
+def MethodType(func, instance, instanceType):
+    if sys.version_info[0] == 3:
+        return types.MethodType(func, instance)
+    else:
+        return types.MethodType(func, instance, instanceType)
+
+class Duck(QObject):
+    def __init__(self):
+        QObject.__init__(self)
+    def childEvent(self, event):
+        QObject.childEvent(self, event)
+
+class TestDuckPunchingOnQObjectInstance(UsesQCoreApplication):
+    '''Test case for duck punching new implementations of C++ virtual methods into object instances.'''
+
+    def setUp(self):
+        #Acquire resources
+        self.duck_childEvent_called = False
+        UsesQCoreApplication.setUp(self)
+
+    def tearDown(self):
+        #Release resources
+        del self.duck_childEvent_called
+        UsesQCoreApplication.tearDown(self)
+
+
+    def testChildEventMonkeyPatch(self):
+        #Test if the new childEvent injected on QObject instance is called from C++
+        parent = QObject()
+        def childEvent(obj, event):
+            self.duck_childEvent_called = True
+        parent.childEvent = MethodType(childEvent, parent, QObject)
+        child = QObject()
+        child.setParent(parent)
+        self.assertTrue(self.duck_childEvent_called)
+        # This is done to decrease the refcount of the vm object
+        # allowing the object wrapper to be deleted before the
+        # BindingManager. This is useful when compiling Shiboken
+        # for debug, since the BindingManager destructor has an
+        # assert that checks if the wrapper mapper is empty.
+        parent.childEvent = None
+
+    def testChildEventMonkeyPatchWithInheritance(self):
+        #Test if the new childEvent injected on a QObject's extension class instance is called from C++
+        parent = Duck()
+        def childEvent(obj, event):
+            QObject.childEvent(obj, event)
+            self.duck_childEvent_called = True
+        child = QObject()
+        child.setParent(parent)
+        parent.childEvent = MethodType(childEvent, parent, QObject)
+        child = QObject()
+        child.setParent(parent)
+        self.assertTrue(self.duck_childEvent_called)
+        # This is done to decrease the refcount of the vm object
+        # allowing the object wrapper to be deleted before the
+        # BindingManager. This is useful when compiling Shiboken
+        # for debug, since the BindingManager destructor has an
+        # assert that checks if the wrapper mapper is empty.
+        parent.childEvent = None
+
+if __name__ == '__main__':
+    unittest.main()
+