1 files changed, 109 insertions, 0 deletions
diff --git a/sources/shiboken2/tests/samplebinding/cyclic_test.py b/sources/shiboken2/tests/samplebinding/cyclic_test.py
new file mode 100644
index 000000000..e92b3605f
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+++ b/sources/shiboken2/tests/samplebinding/cyclic_test.py
@@ -0,0 +1,109 @@
+#!/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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+import unittest
+from sample import ObjectType
+from sample import ObjectView
+from sample import ObjectModel
+
+
+
+class ObjTest(unittest.TestCase):
+
+    def test_cyclic_dependency_withParent(self):
+        """Create 2 objects with a cyclic dependency, so that they can
+        only be removed by the garbage collector, and then invoke the
+        garbage collector in a different thread.
+        """
+        import gc
+
+        class CyclicChildObject(ObjectType):
+            def __init__(self, parent):
+                super(CyclicChildObject, self).__init__(parent)
+                self._parent = parent
+
+        class CyclicObject(ObjectType):
+            def __init__(self):
+                super(CyclicObject, self).__init__()
+                CyclicChildObject(self)
+
+        # turn off automatic garbage collection, to be able to trigger it
+        # at the 'right' time
+        gc.disable()
+        alive = lambda :sum(isinstance(o, CyclicObject) for o in gc.get_objects() )
+
+        #
+        # first proof that the wizard is only destructed by the garbage
+        # collector
+        #
+        cycle = CyclicObject()
+        self.assertTrue(alive())
+        del cycle
+        self.assertTrue(alive())
+        gc.collect()
+        self.assertFalse(alive())
+
+    def test_cyclic_dependency_withKeepRef(self):
+        """Create 2 objects with a cyclic dependency, so that they can
+        only be removed by the garbage collector, and then invoke the
+        garbage collector in a different thread.
+        """
+        import gc
+
+        class CyclicChildObject(ObjectView):
+            def __init__(self, model):
+                super(CyclicChildObject, self).__init__(None)
+                self.setModel(model)
+
+        class CyclicObject(ObjectModel):
+            def __init__(self):
+                super(CyclicObject, self).__init__()
+                self._view = CyclicChildObject(self)
+
+        # turn off automatic garbage collection, to be able to trigger it
+        # at the 'right' time
+        gc.disable()
+        alive = lambda :sum(isinstance(o, CyclicObject) for o in gc.get_objects() )
+
+        #
+        # first proof that the wizard is only destructed by the garbage
+        # collector
+        #
+        cycle = CyclicObject()
+        self.assertTrue(alive())
+        del cycle
+        self.assertTrue(alive())
+        gc.collect()
+        self.assertFalse(alive())
+
+if __name__ == '__main__':
+    unittest.main()
+