Tag Archives: test driven development

More Swift – A minor refactor

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In my earlier I post I talked about not being very sure that a method I wrote for one of the Stanford iOS Programming course assignments was really embracing Swift as a language. I then posted about using Swift’s unit test framework that would make any refactoring easier and better.

And so on to the refactoring…

Well, with a fresh day came a fresh eye, and there was not too much I could really do to make the method more Swift than C/C++. I ended up mainly folding some let statements into inline expressions. Not exactly hard, but when all was completed I think the code is more or less as tight as it could be and still easily readable – opinions to the contrary are very welcome.

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Using Swift’s Unit Test Framework

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In an earlier blog post I wrote about my solution to one of the homework assignments for Stanford University’s iOS programming course. My conclusion was that, while the code worked, it seemed a little bit too C-like and not really embracing some of the elegance of the Swift programming language.

My intention is to rewrite the code and see if I can get it looking somewhat more Swifty. But of course in doing that I don’t want to break it – there’s a lot of different cases the CalculatorBrain has to handle. This is a classic scenario that can be solved using automated unit testing.

When you create a new application project in XCode, as well as the main build target you get given a test target with boilerplate code for using XCode’s unit testing framework. It is simple to use – just add new functions to the test class, and use XCTAsserts to ensure the right results.

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