def METHOD_NAME(self):
    """
    Ensure that the FlowTest can raise an exception via the screen_return_value.
    """
    # A generic Exception should be caught by the Controller and routed to the
    # UnhandledExceptionView.
    self.run_sequence([
        FlowStep(MainMenuView, screen_return_value=Exception("Test exception")),
        FlowStep(UnhandledExceptionView),
    ])