Eric Kryski ekryski

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

Better Permissions Control

We have introduced 3 new hooks and 2 new middleware as part of feathers-permissions that give you much more flexibility and control over access permissions than was previously possible. Permissions are stored in the database on the entity record that needs to have access permissions checked (typically a user). They look like this:

[
    '*', // all services, all methods, all docs
    'users:*', // all methods on users service
    'users:remove:*', // can remove any user
    '*:remove', // can remove on any service

	# Get root:

	sudo su

	# Install prerequisites:

	apt-get install build-essential pkg-config checkinstall git avahi-daemon libavahi-client-dev libcrack2-dev libwrap0-dev autotools-dev automake libtool libdb-dev libacl1-dev libdb5.1-dev db-util db5.1-util libgcrypt11 libgcrypt11-dev

	# Build libevent from source:
	cd /usr/local/src

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title></title>
	<link rel="stylesheet" href="../libs/mocha.css" type="text/css" media="screen" title="no title" charset="utf-8">
	</head>
	<body>
	<div id="mocha"></div>
	<script src="../libs/mocha.js" type="text/javascript" charset="utf-8"></script>

	var fs = require("fs")
	var ssl_options = {
	key: fs.readFileSync('privatekey.pem'),
	cert: fs.readFileSync('certificate.pem')
	};

	var port = process.env.PORT \|\| 3000;
	var express = require('express');
	var ejs = require('ejs');
	var passport = require('passport')

	#include <stdlib.h>
	#include <stdexcept>
	#include <iostream>
	#include <XnCppWrapper.h>
	#include <XnUSB.h>

	#define VID_MICROSOFT 0x45e
	#define PID_NUI_MOTOR 0x02b0

	XN_USB_DEV_HANDLE dev;

	#Deploy and rollback on Heroku in staging and production
	task :deploy_staging => ['deploy:set_staging_app', 'deploy:push', 'deploy:restart', 'deploy:tag']
	task :deploy_production => ['deploy:set_production_app', 'deploy:push', 'deploy:restart', 'deploy:tag']

	namespace :deploy do
	PRODUCTION_APP = 'YOUR_PRODUCTION_APP_NAME_ON_HEROKU'
	STAGING_APP = 'YOUR_STAGING_APP_NAME_ON_HEROKU'

	task :staging_migrations => [:set_staging_app, :push, :off, :migrate, :restart, :on, :tag]
	task :staging_rollback => [:set_staging_app, :off, :push_previous, :restart, :on]