How can you test the contents of a UIAlertAction handler with OCMock

Question

I\'ve got an app where I push a UIAlertController with several custom UIAlertActions. Each UIAlertAction performs unique tasks in the

Answer 1

With a bit of clever casting, I've found a way to do this in Swift (2.2):

extension UIAlertController {

    typealias AlertHandler = @convention(block) (UIAlertAction) -> Void

    func tapButtonAtIndex(index: Int) {
        let block = actions[index].valueForKey("handler")
        let handler = unsafeBitCast(block, AlertHandler.self)

        handler(actions[index])
    }

}

This allows you to call alert.tapButtonAtIndex(1) in your test and have the correct handler executed.

(I would only use this in my test target, btw)