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Recognizing Code that Resists Unit Testing
Jon Reid
iOS Technical Agile Coach

Abstract: Developers writing for Apple platforms often struggle with unit testing. "Here is my code. I don't see how to write a unit test for it." When this happens, the code is trying to raise a red flag about its design. There's something about it that resists testing.

In this talk, you'll learn what kinds of dependencies make testing difficult and what to do about them. We'll do this by considering what kinds of dependencies are problem-free and meet the FIRE rules of testability. This will help you recognize difficult dependencies.

Then we'll briefly summarize how to isolate these such dependencies. You'll know how to change your existing code to make it testable. Your improved design sense will help you avoid writing untestable code in the first place.
Bio: Jon Reid is the author of iOS Unit Testing by Example: XCTest Tips and Techniques Using Swift. Jon is a leading expert in unit testing and test-driven development (TDD) for iOS. He has been practicing TDD on Apple platforms for 19 years. His consultancy Quality Coding offers training for iOS teams in technical agile practices. These include unit testing, TDD, and refactoring.

Links:
Jon's book "iOS Unit Testing by Example": https://pragprog.com/titles/jrlegios/...
Jon's website: https://qualitycoding.org/

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