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diff --git a/sources/shiboken2/tests/samplebinding/objecttype_test.py b/sources/shiboken2/tests/samplebinding/objecttype_test.py
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+++ b/sources/shiboken2/tests/samplebinding/objecttype_test.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+#############################################################################
+##
+## 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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+'''Tests ObjectType class of object-type with privates copy constructor and = operator.'''
+
+import unittest
+import sys
+
+from sample import ObjectType, Str
+import shiboken2 as shiboken
+
+
+class ObjectTypeTest(unittest.TestCase):
+    '''Test cases  ObjectType class of object-type with privates copy constructor and = operator.'''
+
+    def testObjectTypeSetObjectNameWithStrVariable(self):
+        '''ObjectType.setObjectName with Str variable as argument.'''
+        s = Str('object name')
+        o = ObjectType()
+        o.setObjectName(s)
+        self.assertEqual(str(o.objectName()), str(s))
+
+    def testObjectTypeSetObjectNameWithStrInstantiation(self):
+        '''ObjectType.setObjectName with Str instantiation as argument.'''
+        s = 'object name'
+        o = ObjectType()
+        o.setObjectName(Str(s))
+        self.assertEqual(str(o.objectName()), s)
+
+    def testObjectTypeSetObjectNameWithPythonString(self):
+        '''ObjectType.setObjectName with Python string as argument.'''
+        o = ObjectType()
+        o.setObjectName('object name')
+        self.assertEqual(str(o.objectName()), 'object name')
+
+    def testNullOverload(self):
+        o = ObjectType()
+        o.setObject(None)
+        self.assertEqual(o.callId(), 0)
+        o.setNullObject(None)
+        self.assertEqual(o.callId(), 1)
+
+    def testParentFromCpp(self):
+        o = ObjectType()
+        self.assertEqual(sys.getrefcount(o), 2)
+        o.getCppParent().setObjectName('parent')
+        self.assertEqual(sys.getrefcount(o), 3)
+        o.getCppParent().setObjectName('parent')
+        self.assertEqual(sys.getrefcount(o), 3)
+        o.getCppParent().setObjectName('parent')
+        self.assertEqual(sys.getrefcount(o), 3)
+        o.getCppParent().setObjectName('parent')
+        self.assertEqual(sys.getrefcount(o), 3)
+        o.getCppParent().setObjectName('parent')
+        self.assertEqual(sys.getrefcount(o), 3)
+        o.destroyCppParent()
+        self.assertEqual(sys.getrefcount(o), 2)
+
+    def testNextInFocusChainCycle(self):
+        parent = ObjectType()
+        child = ObjectType(parent)
+        next_focus = child.nextInFocusChain()
+
+        shiboken.invalidate(parent)
+
+    def testNextInFocusChainCycleList(self):
+        '''As above but in for a list of objects'''
+        parents = []
+        children = []
+        focus_chains = []
+        for i in range(10):
+            parent = ObjectType()
+            child = ObjectType(parent)
+            next_focus = child.nextInFocusChain()
+            parents.append(parent)
+            children.append(child)
+            focus_chains.append(next_focus)
+
+        shiboken.invalidate(parents)
+
+    def testClassDecref(self):
+        # Bug was that class PyTypeObject wasn't decrefed when instance died
+        before = sys.getrefcount(ObjectType)
+
+        for i in range(1000):
+            obj = ObjectType()
+            shiboken.delete(obj)
+
+        after = sys.getrefcount(ObjectType)
+
+        self.assertLess(abs(before - after), 5)
+
+if __name__ == '__main__':
+    unittest.main()