[MERGE] Add exit() on progressbars from TestUIFactory

[Martin Pool]

2009/6/9 Robert Collins <robertc at robertcollins.net>:
>>   For this type of case I started thinking just avoiding
>> progress in generators may be the only sane thing.
>
> I think the driver function has to be responsible - I think I may have
> mentioned that in brisbane; if not, then - 'I think the driver function
> has to be responsible' :).
>
> Of course, it gets more complex still when a driver is called by
> multiple steps of a nested generator. Argh.

I think I need to survey the cases where we use them, and that's where
my cursor is metaphorically blinking at the moment.

-- 
Martin <http://launchpad.net/~mbp/>