Swift on code.kiwi.com

Feature configuration with Swift macros

Mon, 15 Sep 2025 11:24:59 +0000

This article describes how we made the iOS app feature configuration system more ergonomic by using Swift’s macros. We take a framework with repetitive, hard-to-understand declarations and manual mocking and eliminate all of these weaknesses.

Swift 5.10 Concurrency Survival Guide

Wed, 27 Mar 2024 12:54:34 +0000

This pattern was broken a few years ago when new versions of Swift started coming out in point updates. Xcode 15.3 includes Swift 5.10. Reading through the release notes, one can find a few mentions of concurrency, such as:

Generating SwiftUI snapshot tests with Swift macros

Thu, 15 Feb 2024 11:38:09 +0000

Note: Xcode currently does not offer native support for snapshot testing. This can be remedied by using third party library, such as swift-snapshot-testing. This library is being used in following code examples.

Problem

SwiftUI preview and snapshot test code live in different targets and often in different packages, especially when dealing with modular architecture.

Guide to advanced UI tests on iOS

Wed, 15 May 2019 21:32:00 +0000

Image source

Let’s talk about tests for iOS today — especially about writing advanced UI tests using the XCTest framework.

Before we start, I’d like you to know I will skip all the preparations — such as creating a new test target and adding pods to test target since it’s something you should already know before reading this article. Guide to these settings can be found eg here. Also, as for the languages, we will be using mainly Swift and a bit of Objective-C.