warning: Unable to restore previously selected frame. about kiwi HOT 5 CLOSED

This problem is caused by attempting to intercept messages (spying/stubbing) on objects that are toll-free bridged to their CoreFoundation counterparts. Due to the way that message interception is set up (by creating a custom class at runtime), this cannot be supported.

I've made a change that ensures this fails fast with a descriptive error.

My recommendation would be that you should only ever mock/stub types you own, don't stub/mock native types.

from kiwi.

Nice... Is stubbing NSString supported by OCMock?

from kiwi.

Good question, I haven't tried. If I get a chance I'll look.

Aside from this issue though, my general advice is still to only mock and stub types you own. This is a great book on mock-driven testing - I highly recommend it - and it covers this concept in more detail.

from kiwi.

Thanks. I'll check that out? In this case, does that guideline still apply since I'm stubbing my own category methods on NSString?

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It's borderline, although slightly moot as there is no way currently to stub methods on NSString. I'm curious as to why you are trying to stub your category method; would it not make sense to test it directly? It strikes me that lines 2 and 3 in your spec are redundant.

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