Jon Reid

@qualitycoding

Author of iOS Unit Testing by Example . Technical coach, ex-Industrial Logic. Over 20 years of #TDD. Code with joy, drive down your cost of change. he/him

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Jon Reid@qualitycoding· 14d

In TDD, you sometimes write code that looks obviously wrong on purpose — like hard-coding "0" instead of real logic. It feels uncomfortable. That discomfort is actually the point. Here's why. https://qualitycoding.org/swiftui-tdd-fake-it-till-you-make-it-part-2/

Jon Reid@qualitycoding· 29d

I'm building the trip preparation checklist app _I want_ for myself. Note I say "preparation checklist" not "packing list" because hey, I have more to do than pack. With completely customizable "categories" (Flying, Driving, etc.), I bet people will use it in ways I never thought of. #BuildInPublic

iPhone screen "Select Categories": Choose which categories to include in your trip checklist.

Jon Reid@qualitycoding· Jul 7

Swift Testing's failure messages look "funny". But that's not the real problem. The real problem is when they show up in the wrong place entirely. https://qualitycoding.org/swift-testing-custom-assertions/ #SwiftLang

Image shows a man looking through binoculars and asking "WHERE ARE YOU?".

Jon Reid@qualitycoding· Jul 6

> ❯ Elegant Objects by Yegor Bugayenko recommends against `-er` names

⏺ Good catch — TipsBootstrapper has the same -er shape as Controller. Bugayenko's critique: -er/-or names describe a job
title (what it does) rather than what the object is, and tend to signal procedural thinking smuggled into an object.

Looking at what's already in the codebase, the existing names are all "thing" nouns, not agent nouns: SavedFile,
KeyValueStore, TemplateRepository, TipsResetStore — none end in -er.

⭐ TipsStartup — names the thing itself (the startup routine/state), matches the noun convention already in use, and
still reads naturally as TipsStartup.create().configureForLaunch(...).

❌ TipsSetup — close second, but "setup" reads slightly more like a one-time action than a persistent thing.
❌ TipsLifecycle — accurate but broader than what the object actually does (it only handles the launch moment, not the
full lifecycle).
❌ TipsLaunch — reads oddly as a type name (TipsLaunch.create() sounds like invoking a launch, not building an object).

Want TipsStartup in the plan?

Jon Reid@qualitycoding· Jun 17

Is LinkedIn website broken for anyone else? I tried disabling my ad blockers but that hasn't helped.

LinkedIn feed with spinner where content should be

Jon Reid@qualitycoding· Jun 8

Just starting to watch the #WWDC keynote. Oh hey, they highlight the most egregious things about Liquid Glass that will be "improved" in iOS 27, meaning fixed. Meanwhile, here's my lovely face on iOS 26:

Jon's face distorted by a folder on iOS 26

Jon Reid@qualitycoding· Jun 6

Does testing SwiftUI feel impossible compared to writing the feature itself? https://qualitycoding.org/swiftui-tdd-first-failing-test-part-1/

Jon Reid@qualitycoding· Apr 15

British tabloid front page response to Trump-as-Jesus: "You're not the Messiah you're a very naughty boy"

Jon Reid@qualitycoding· Apr 2

Finally! Discovered thanks to running SwiftFormat over this project. Swift 6.2 means you can write backtick test names (like Kotlin).

Code diff.
Before:
@Test("Current app version is valid")
func appVersionCurrent() async throws

After:
@Test
func `Current app version is valid`

Jon Reid@qualitycoding· Mar 14

Brian Zahnd:

You can justify wars of conquest with the Bible, but you have to ignore Jesus to do it.

Using the Bible to ignore Jesus is the worst thing you can do with the Bible.

The question isn't, "Is it biblical?" Wars of conquest, the institution of slavery, death sentence for adultery, and women as property are all biblical.

The question is, "Is it Christlike?"

Jon Reid@qualitycoding· Mar 1

“Christ Breaks the Rifle” by kellylatimoreicons.com

Icon by Kelly Latimore depicting Jesus Christ breaking an assault rifle

Jon Reid@qualitycoding· Feb 28

I'm starting a new iOS app, and feel like I already have several things to blog about. But first, a micro-blog: - I want the Swift Package to contain all non-UI code. - Incredible feedback speed compared to testing in iOS simulator! - Many think "unit tests" means each type needs a test file. Nope.

Xcode showing Swift Package. Production code: 17 types. 12 Swift Testing tests in 3 test suites, total time 0.002 seconds.

Jon Reid@qualitycoding· Jan 14

Bugs are opportunities. How can you get the most value from the next defect you fix? https://qualitycoding.org/safety-nets-guardrails/

Jon Reid@qualitycoding· Jan 9

This was me, at the top of the main AppCode page. I still hold to that quote.

JetBrains webpage for AppCode, with testimonial from Jon Reid: "With AppCode, it feels like code flies from my head to the screen."

Jon Reid@qualitycoding· Jan 9

Cleaning out a drawer, I found my old AppCode t-shirt. It's been 3 years since the only JetBrains IDE for Apple development was killed. It still has no substitute. AI tools can do some refactoring, but not: - provably - deterministically - locally - in a single keystroke that expresses my intention

Jon Reid@qualitycoding· Dec 17

ApprovalTests in Swift makes it easy to write powerful parameterized tests. Verify a sequence of inputs, but transform the values through the function you want. https://qualitycoding.org/parameterized-tests-approvaltests-swift/

Jon Reid@qualitycoding· Nov 21

Looking for a technical book for a friend? Or for yourself? …Maybe even my book iOS Unit Testing by Example? Now's your chance to snag a deal at pragprog.com! Check out with discount code "save50" Do it while you can, offer ends December 1

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Jon Reid@qualitycoding· Nov 17

Stop pretending SwiftUI tests are impossible — ViewInspector lets you inspect views and verify behavior. https://qualitycoding.org/viewinspector-swiftui-testing/

Jon Reid@qualitycoding· Oct 28

How ViewInspector Unlocks SwiftUI Testing https://qualitycoding.org/viewinspector-swiftui-testing/

Jon Reid@qualitycoding· Oct 3

TDD isn't about writing code first — it's about thinking first https://qualitycoding.org/describe-test-plain-english/

Geordi Drake meme
Top (reject): writing code first
Bottom (approve): thinking first

Jon Reid@qualitycoding· Oct 2

RIP Jane Goodall. I used to read about her in the old National Geographic issues we had at our summer cabin.

The Far Side cartoon features two chimpanzees in a tree, with one discovering a blonde hair on the other, asking, "Conducting a little more 'research' with that Jane Goodall tramp?"

Jon Reid@qualitycoding· Sep 30

Describe Your Test in Plain English https://qualitycoding.org/describe-test-plain-english/

iOS Test-Driven Development
Describe Your Test in Plain English
Quality Coding with Jon Reid
Image of post-it note with test

Jon Reid@qualitycoding· Sep 18

🚨 FLASH SALE ALERT 🚨 45% OFF iOS Unit Testing by Example! Sale starts NOW (14:00 UTC) — for just 48 hours. Already have my book? Grab another! May I suggest Agile Retrospectives? Visit https://pragprog.com Promo code: flashsale

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Jon Reid@qualitycoding· Sep 1

Anyone else write a lot of Xcode code snippets? I haven't seen a description of the "Availability" choices, showing "This applies here, but not there."

Jon Reid@qualitycoding· Aug 18

TDD isn't just "write a test first." It's also knowing _which_ test matters most. https://qualitycoding.org/tdd-where-do-you-even-begin/

Jon Reid@qualitycoding· Aug 13

See how my code changes as I pair program with Swift 6. Join us for a fun conversation about working with strict concurrency for data race safety. https://qualitycoding.org/conversation-swift6-data-race-safety/

Jon Reid@qualitycoding· Aug 12

I am not happy, Apple

Future versions of macOS will no longer support Time Capsule disks for Time Machine backups.

Jon Reid@qualitycoding· Aug 2

Xcode supports some automated refactoring — but the options are often disabled when you need them. They're buried, unpredictable, and easy to give up on. So… https://qualitycoding.org/xcode-key-bindings-refactoring/

Lucy pulling football away from Charlie Brown's kick (again)

Jon Reid@qualitycoding· Jun 7

Going to #WWDC? I’ll be at the RevenueCat pre-WWDC Bashcade on Sunday night. Help this introvert out by saying hi, and ask me for a Quality Coding laptop sticker 😀

Holding several Quality Coding laptop stickers

Jon Reid@qualitycoding· Apr 16

Learn to set up CI tooling for Xcode projects using GitHub Actions. Reduce remote debugging time with local scripts and fast feedback loops. https://qualitycoding.org/github-actions-ci-xcode/