Created new unittest model.

Separete unittest for module.
Only run unittest for compiled modules.

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

tests/QtCore/qstring_buffer_protocol_test.py

@@ -0,0 +1,20 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+'''Tests QString implementation of Python buffer protocol'''
+
+import unittest
+
+from os.path import isdir
+from PySide.QtCore import QString
+
+class QStringBufferProtocolTest(unittest.TestCase):
+    '''Tests QString implementation of Python buffer protocol'''
+
+    def testQStringBufferProtocol(self):
+        #Tests QString implementation of Python buffer protocol using the os.path.isdir
+        #function which an unicode object or other object implementing the Python buffer protocol
+        isdir(QString('/tmp'))
+
+if __name__ == '__main__':
+    unittest.main()
+