Leo Shimonaka leoshimo

The Ultimate Swift Testing Playbook (2024 WWDC Edition, expanded with Apple docs from June 2025)

Updated with info from https://developer.apple.com/documentation/testing fetched via Firecrawl on June 7, 2025.

See also my blog: See also my blog post: https://steipete.me/posts/2025/migrating-700-tests-to-swift-testing

A hands-on, comprehensive guide for migrating from XCTest to Swift Testing and mastering the new framework. This playbook integrates the latest patterns and best practices from WWDC 2024 and official Apple documentation to make your tests more powerful, expressive, and maintainable.

1. Migration & Tooling Baseline

Why did you do this?

Relax, I only have one Sunday to work on idea, literally my weekend project. So I tried Deepseek to see if it can help. Surprisingly, it works and it saves me another weekend...

What is your setup?

Just chat.deepseek.com (cost = free) with prompts adapted from this gist.

Does it work in one-shot or I have to prompt it multiple times?

Moved to https://github.com/kbilsted/Functional-core-imperative-shell/blob/master/README.md

	#!/bin/bash

	# MIT License
	#
	# Copyright (c) 2018 Derek Selander (@LOLgrep)
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

	#!/usr/sbin/dtrace -s

	/* Run like:
	% sudo csh
	# ./spy.d $PROCESS_ID [$INTERESTING_PROBEPROV]

	Prints a line of dashes every 5 seconds to delineate different experiments.
	*/

	#pragma D option quiet