[pitivi] Add a check for doing/undoing timeline objects priority changes.

[Edward Hervey <edwardrv src gnome org>]

commit d1c14cf711aa0ff9914f5d3f1bede4e7b709d0f1
Author: Alessandro Decina <alessandro d gmail com>
Date:   Thu Jun 11 13:41:22 2009 +0200

    Add a check for doing/undoing timeline objects priority changes.

 tests/test_timeline_undo.py |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/tests/test_timeline_undo.py b/tests/test_timeline_undo.py
index 6eef513..bca4ccf 100644
--- a/tests/test_timeline_undo.py
+++ b/tests/test_timeline_undo.py
@@ -185,3 +185,15 @@ class  TestTimelineUndo(TestCase):
         self.failUnlessEqual(self.timeline_object1.start, 5 * gst.SECOND)
         self.action_log.redo()
         self.failUnlessEqual(self.timeline_object1.start, 10 * gst.SECOND)
+
+        self.timeline_object1.priority = 10
+        self.action_log.begin("priority change")
+        self.timeline_object1.priority = 20
+        self.action_log.commit()
+
+        self.failUnlessEqual(self.timeline_object1.priority, 20)
+        self.action_log.undo()
+        self.failUnlessEqual(self.timeline_object1.priority, 10)
+        self.action_log.redo()
+        self.failUnlessEqual(self.timeline_object1.priority, 20)
+