Created unit test to test shiboken objects destructor.

Reviewer: Marcelo Lira <marcelo.lira@openbossa.org>
          Luciano Wolf <luciano.wolf@openbossa.org>

tests/QtCore/qobject_destructor.py

@@ -0,0 +1,19 @@
+import sys
+import unittest
+from PySide import QtCore
+
+class MyObject(QtCore.QObject):
+    def __init__(self, other=None):
+        QtCore.QObject.__init__(self, None)
+        self._o = other
+
+class TestDestructor(unittest.TestCase):
+    def testReference(self):
+        o = QtCore.QObject()
+        m = MyObject(o)
+        self.assertEqual(sys.getrefcount(o), 3)
+        del m
+        self.assertEqual(sys.getrefcount(o), 2)
+
+if __name__ == '__main__':
+    unittest.main()