Created unit test for bug #931.

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

tests/QtCore/bug_931.py

@@ -0,0 +1,15 @@
+import unittest
+
+from PySide.QtCore import QObject, Signal
+o = QObject()
+
+class CheckSignalType(unittest.TestCase):
+    def testSignal(self):
+        self.assertTrue(isinstance(QObject.destroyed, Signal))
+        self.assertEqual(type(QObject.destroyed), Signal)
+
+        self.assertEqual(type(o.destroyed).__name__, "SignalInstance")
+        self.assertNotEqual(type(o.destroyed), Signal)
+
+if __name__ == '__main__':
+    unittest.main()