On May 12, 2009, at 9:43 AM, Michael Ash wrote: [snip]
This is actually surprisingly easy. (Caveat: I have not actually done this.) Use -methodForSelector: to get the IMP for a nonexistent method. This IMP will be a function pointer straight to the runtime's forwarding machinery. Then install that IMP as the implementation for your overridden methods. Callers will go straight into the forwarding machinery rather than into your overridden methods, which will then invoke -forwardInvocation: as usual and you can then do as you like. Since I haven't ever tried this, I'd be very interested to know how it works for you if you try it.
Brilliant! It works perfectly. Now I just need to wire up a bunch of plumbing and I'll have a patch that handles actual partial mocks.
Mike
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