April 2015
Intermediate to advanced
556 pages
17h 47m
English
book
Cocoa Programming for OS X: The Big Nerd Ranch Guide
by Aaron Hillegass, Adam Preble, Nate Chandler
Content preview from Cocoa Programming for OS X: The Big Nerd Ranch Guide
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Refactoring for Testing
When you write an application without testing in mind, you will often write code that is difficult to test. In Chapter 28, you implemented ScheduleFetcher’s method fetchCoursesUsingCompletionHandler(_:). In that implementation, you call NSURLSession.dataTaskWithRequest(_:completionHandler:). and pass in a complex completion handler which transforms the triple of data, response, and error into a FetchCoursesResult.
As the method is currently implemented, the logic of the completion handler is very difficult to test: testing it requires calling fetchCoursesUsingCompletionHandler(_:) which entails calling an asynchronous HTTP method. To avoid making an HTTP request, you will refactor ScheduleFetcher.
In ScheduleFetcher.swift ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.