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/QtGui/qlayout_ref_test.py

@@ -0,0 +1,112 @@
+
+'''Test cases for QLayout handling of child widgets references'''
+
+import unittest
+from sys import getrefcount
+
+from PySide.QtGui import QHBoxLayout, QVBoxLayout, QGridLayout, QWidget
+from PySide.QtGui import QStackedLayout, QFormLayout
+from PySide.QtGui import QApplication, QPushButton, QLabel
+
+from helper import UsesQApplication
+
+class SaveReference(UsesQApplication):
+    '''Test case to check if QLayout-derived classes increment the refcount
+    of widgets passed to addWidget()'''
+
+    # Adding here as nose can't see the qapplication attrib we inherit
+    qapplication = True
+
+    def setUp(self):
+        #Acquire resources
+        super(SaveReference, self).setUp()
+        self.widget1 = QPushButton('click me')
+        self.widget2 = QLabel('aaa')
+
+    def tearDown(self):
+        #Release resources
+        del self.widget2
+        del self.widget1
+        super(SaveReference, self).tearDown()
+
+    def checkLayoutReference(self, layout):
+        #Checks the reference cound handling of layout.addWidget
+        self.assertEqual(getrefcount(self.widget1), 2)
+        layout.addWidget(self.widget1)
+        self.assertEqual(getrefcount(self.widget1), 3)
+
+        self.assertEqual(getrefcount(self.widget2), 2)
+        layout.addWidget(self.widget2)
+        self.assertEqual(getrefcount(self.widget2), 3)
+
+        # Check if doesn't mess around with previous widget refcount
+        self.assertEqual(getrefcount(self.widget1), 3)
+
+    def testMoveLayout(self):
+        l = QHBoxLayout()
+        self.assertEqual(getrefcount(self.widget1), 2)
+        l.addWidget(self.widget1)
+        self.assertEqual(getrefcount(self.widget1), 2)
+
+        w = QWidget()
+        w.setLayout(l)
+        self.assertEqual(getrefcount(self.widget1), 3)
+
+
+    def testHBoxReference(self):
+        #QHBoxLayout.addWidget reference count
+        w = QWidget()
+        self.checkLayoutReference(QHBoxLayout(w))
+
+    def testVBoxReference(self):
+        #QVBoxLayout.addWidget reference count
+        w = QWidget()
+        self.checkLayoutReference(QVBoxLayout(w))
+
+    def testGridReference(self):
+        #QGridLayout.addWidget reference count
+        w = QWidget()
+        self.checkLayoutReference(QGridLayout(w))
+
+    def testFormReference(self):
+        #QFormLayout.addWidget reference count
+        w = QWidget()
+        self.checkLayoutReference(QFormLayout(w))
+
+    def testStackedReference(self):
+        #QStackedLayout.addWidget reference count
+        w = QWidget()
+        self.checkLayoutReference(QStackedLayout(w))
+
+class MultipleAdd(UsesQApplication):
+    '''Test case to check if refcount is incremented only once when multiple
+    calls to addWidget are made with the same widget'''
+
+    qapplication = True
+
+    def setUp(self):
+        #Acquire resources
+        super(MultipleAdd, self).setUp()
+        self.widget = QPushButton('click me')
+        self.win = QWidget()
+        self.layout = QHBoxLayout(self.win)
+
+    def tearDown(self):
+        #Release resources
+        del self.widget
+        del self.layout
+        del self.win
+        super(MultipleAdd, self).tearDown()
+
+    def testRefCount(self):
+        #Multiple QLayout.addWidget calls on the same widget
+        self.assertEqual(getrefcount(self.widget), 2)
+        self.layout.addWidget(self.widget)
+        self.assertEqual(getrefcount(self.widget), 3)
+        self.layout.addWidget(self.widget)
+        self.assertEqual(getrefcount(self.widget), 3)
+        self.layout.addWidget(self.widget)
+        self.assertEqual(getrefcount(self.widget), 3)
+
+if __name__ == '__main__':
+    unittest.main()