Created unit test for layout policy.

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

tests/QtGui/bug_1006.py

@@ -1,7 +1,9 @@
 import unittest
 import weakref
+import sys
+
 from PySide.QtCore import Qt
-from PySide.QtGui import QDialog, QLabel, QGridLayout
+from PySide.QtGui import QDialog, QLabel, QGridLayout, QHBoxLayout, QWidget
 
 from helper import TimedQApplication
 
@@ -16,13 +18,15 @@ class LabelWindow(QDialog):
         self._destroyCalled = False
 
 
-    def replace(self):
+    def replace(self, unit):
         old_item = self.test_layout.itemAtPosition(0, 0)
-        ref = weakref.ref(old_item, self._destroyed)
         old_label = old_item.widget()
-        del old_item
+        ref = weakref.ref(old_item, self._destroyed)
 
         self.test_layout.removeWidget(old_label)
+        unit.assertRaises(RuntimeError, old_item.widget)
+        del old_item
+
         label = QLabel("Label New")
         old_label.deleteLater()
         label.setAlignment(Qt.AlignCenter)
@@ -35,9 +39,45 @@ class TestBug1006 (TimedQApplication):
 
     def testLayoutItemLifeTime(self):
         window = LabelWindow(None)
-        window.replace()
+        window.replace(self)
         self.assertTrue(window._destroyCalled)
         self.app.exec_()
 
+    def testParentLayout(self):
+        def createLayout():
+            label = QLabel()
+            layout = QHBoxLayout()
+            layout.addWidget(label)
+
+            widget = QWidget()
+            widget.setLayout(layout)
+            return (layout, widget)
+        (layout, widget) = createLayout()
+        item = layout.itemAt(0)
+        self.assertTrue(isinstance(item.widget(), QWidget))
+
+    def testRemoveOrphanWidget(self):
+        widget = QLabel()
+        layout = QHBoxLayout()
+        layout.addWidget(widget)
+        self.assertEqual(sys.getrefcount(widget), 3)
+
+        layout.removeWidget(widget)
+        widget.setObjectName("MyWidget")
+        self.assertEqual(sys.getrefcount(widget), 2)
+
+    def testRemoveChildWidget(self):
+        parent = QLabel()
+        widget = QLabel(parent)
+        self.assertEqual(sys.getrefcount(widget), 3)
+
+        layout = QHBoxLayout()
+        layout.addWidget(widget)
+        self.assertEqual(sys.getrefcount(widget), 3)
+
+        layout.removeWidget(widget)
+        widget.setObjectName("MyWidget")
+        self.assertEqual(sys.getrefcount(widget), 3)
+
 if __name__ == "__main__":
     unittest.main()