Quality Coding
iOS Unit Testing

Use Tests to Gain New Power over iOS Code.

Learn how to build maintainable iOS code and test code. Then you can “respond to change,” because your code won’t fight you.

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3 Ways for You to Grow Your Testing Skills

Unit testing drives down your cost of change. Here's how to get started:

Read the Book

Get up to speed with iOS Unit Testing by Example: XCTest Tips and Techniques Using Swift. The book is available in beta from The Pragmatic Programmers. If you want to see results fast, this book is for you.

Take the Workshop

​​Learn Test-Driven Development, with an emphasis on unit-testing ​view controllers. Experience emergent design, the power of refactoring in small steps, and adding tests to legacy code.

Get the Coaching

The best way to make headway in your actual working code is through coaching sessions. I can save you time and trouble by helping you over the bumps in your code’s testability and design.

​​​Discover ​the Quality Coding Blog

Stay up to date with the latest tips for building quality into iOS code.

TDD

The 3 Laws of TDD: Focus on One Thing at a Time

When I was first learning TDD, I’d try to get to the First Step (a failing test) by writing a fully-formed test. But it often took a lot fiddling to get that test to run and fail.

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Unit Testing

Unit Test Naming: The 3 Most Important Parts

​You run your unit tests, and get a failure. How many times have you had to dig through the test code to try to understand what it’s complaining about?Why

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Dev Tools

How Remote Mob Programming Is Working for Me

Ever since I experienced mob programming, it became my primary teaching tool. But due to COVID-19, it’s suddenly time for me to support remote workshops. Can mob programming work

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Unit Testing

3 Easy Steps for Designing iOS Unit Tests

(While I’m busy finishing my book, here’s a guest post from Ellie Coverdale. Take it away, Ellie… —Jon) Unit testing is an important part of establishing the correct functionality of

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I have to blame Jon. As I read through code, I start thinking about how can I test something, instead of simply adding another "quick fix." It's paying off, as more and more of the team catch their first bug using tests, or sleep better at night. Even customers are asking for tests now!

Diego Freniche

Mobile developer

I saw Jon speak at Code Camp. Between the content and the presentation style, I realized I'd discovered my second TDD thought leader — that the content was perfect for engineering leaders.

Ron Lichty

VP Engineering

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