def test_undo_error(self):
"""Checks undo a stack containing a failing action."""
stack = UndoableActionStack("meh", mergeable=False)
action1 = mock.Mock(spec=UndoableAction)
action1.expand.return_value = False
action2 = mock.Mock(spec=UndoableAction)
action2.expand.return_value = False
action2.undo.side_effect = UndoError("meh")
action3 = mock.Mock(spec=UndoableAction)
stack.push(action1)
stack.push(action2)
stack.push(action3)
self.assertRaises(UndoError, stack.undo)
self.assertEqual(action1.undo.call_count, 0)
self.assertEqual(action2.undo.call_count, 1)
self.assertEqual(action3.undo.call_count, 1)
def testUndoError(self):
"""
Undo a stack containing a failing action.
"""
stack = UndoableActionStack("meh")
action1 = mock.Mock(spec=UndoableAction)
action2 = mock.Mock(spec=UndoableAction)
action2.undo.side_effect = UndoError("meh")
action3 = mock.Mock(spec=UndoableAction)
stack.push(action1)
stack.push(action2)
stack.push(action3)
self.assertRaises(UndoError, stack.undo)
self.assertEqual(action1.undo.call_count, 0)
self.assertEqual(action2.undo.call_count, 1)
self.assertEqual(action3.undo.call_count, 1)
def undo_fail(self):
raise UndoError("meh")