iOS Unit Testing by Example: XCTest Tips and Techniques Using Swift »

Fearlessly change the design of your iOS code—including view controllers—with XCTest and Swift. Isolate and replace dependencies in legacy code that doesn't have tests. Practice safe refactoring that makes these tests possible, and watch all your changes get verified quickly and automatically. Make even the boldest code changes with complete confidence!

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On this day in 1947, the first widely reported UFO sighting was near Mount Rainier, Washington.

Effective, supportive unit tests can be as rare as UFO sightings these days. Many people seem to forget that unit testing is a coding technique. Unit tests let you make the boldest changes to your code with complete confidence. Learn how with iOS Unit Testing by Example: XCTest Tips and Techniques Using Swift, now content complete and available from pragprog.com/titles/jrlegios.

iOS Unit Testing by Example: XCTest Tips and Techniques Using Swift

Manual code and UI testing get slower the deeper your navigation hierarchy goes. It can take several taps just to reach a particular screen, never mind the actual workflow tests. Automatic unit testing offers such rapid feedback that it can change the rules of development. Bring testing to iOS development, even for legacy code. Use XCTest to write unit tests in Swift for all your code.

iOS developers typically reserve unit tests for their model classes alone. But that approach skips most of the code common to iOS apps, especially with UIViewControllers. Learn how to unit test these view controllers to expand your unit testing possibilities. Since good unit tests form the bedrock for safe refactoring, you're empowered to make bold changes. Learn how to avoid the most common mistakes Swift programmers make with the XCTest framework. Use code coverage to find holes in your test suites. Learn how to identify hard dependencies.

Reshape the design of your code quickly, with less risk and less fear.

Now in print: The ebook is content complete and available from pragprog.com/titles/jrlegios. For the paperback edition, please support your local independent bookstore.

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