Adding new-style signal/slot tests.

Based on Marcelo Lira's source code.

Reviewer: Hugo Parente Lima <hugo.lima@openbossa.org>,
          Luciano Wolf <luciano.wolf@openbossa.org>

tests/signals/ref06_test.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import unittest
+from PySide.QtCore import QObject, QCoreApplication, QTimeLine, Signal, Slot
+from helper import UsesQCoreApplication
+
+class ExtQObject(QObject):
+    signalbetween = Signal('qreal')
+
+    def __init__(self):
+        QObject.__init__(self)
+        self.counter = 0
+
+    @Slot('qreal')
+    def foo(self, value):
+        self.counter += 1
+
+
+class SignaltoSignalTest(UsesQCoreApplication):
+
+    def setUp(self):
+        UsesQCoreApplication.setUp(self)
+        self.receiver = ExtQObject()
+        self.timeline = QTimeLine(100)
+
+    def tearDown(self):
+        del self.timeline
+        del self.receiver
+        UsesQCoreApplication.tearDown(self)
+
+    def testSignaltoSignal(self):
+        self.timeline.setUpdateInterval(10)
+
+        self.timeline.finished.connect(self.app.quit)
+
+        self.timeline.valueChanged.connect(self.receiver.signalbetween)
+        self.receiver.signalbetween.connect(self.receiver.foo)
+
+        self.timeline.start()
+
+        self.app.exec_()
+
+        self.assertEqual(self.receiver.counter, 10)
+
+
+if __name__ == '__main__':
+    unittest.main()
+