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swift-testing-macos

Write Swift Testing suites for AppKit, XPC services, and xcodebuild CI.

1|Updated Jun 5, 2026
Search Tags:#xctest#xcodebuild#parameterized tests#swift testing#macos testing#appkit testing#xpc mocking
One-click install
npx skills add https://github.com/LaughingJackalope/macos-skills --skill swift-testing-macos
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-testing-macos
Source: https://github.com/LaughingJackalope/macos-skills/tree/main/swift-testing-macos
Command: npx skills add https://github.com/LaughingJackalope/macos-skills --skill swift-testing-macos

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Testing macOS applications presents unique challenges including AppKit main thread isolation requirements, XPC service mocking complexity, macOS-specific UI testing quirks, and xcodebuild configuration for CI pipelines. This Skill eliminates trial-and-error by providing production-ready, Apple-documented patterns for all macOS testing scenarios.

Core Features & Use Cases

  • Modern Swift Testing Patterns: Covers @Test, @Suite, #expect, #require, #confirm, traits, and parameterized tests for macOS 26+ with Swift 6.3, including async testing and completion handler bridging.
  • AppKit & XPC Unit Testing: Provides validated patterns for testing NSDocument I/O, NSViewController/NSWindow behavior, and mocking XPC services with protocol mocks to test client logic in isolation.
  • XCTest UI & CI Workflows: Includes macOS-specific UI test patterns for menu bar interaction, window queries, and accessibility identifier setup, plus xcodebuild test commands, test plan configuration, and GitHub Actions CI setup.
  • Use Case: For a document-based macOS app with XPC-backed preferences, use this Skill to write unit tests for NSDocument save/load logic, mock the preferences XPC service to test error handling, and automate UI tests for File menu workflows.

Quick Start

Use the swift-testing-macos skill to write a parameterized Swift Testing suite that validates round-trip NSDocument file I/O for plain text, markdown, and JSON formats.

Frequently Asked Questions about swift-testing-macos

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I mock an XPC service in a macOS unit test?▼

You can mock an XPC service by defining a protocol that the client and service share, then creating a mock implementation conforming to that protocol for your tests. This allows you to test client-side logic and error handling in isolation without relying on a live XPC connection.

What is the best way to test an NSDocument file I/O workflow?▼

The best way to test an NSDocument file I/O workflow is using parameterized Swift Testing suites. This approach validates round-trip save and load logic across multiple file formats like plain text, markdown, and JSON efficiently within your macOS application.

How do I handle main actor isolation and async tests in Swift Testing?▼

Handle main actor isolation and async tests in Swift Testing by using built-in async test handling patterns and completion handler bridging. This ensures your AppKit tests execute on the correct thread while validating asynchronous operations.

How do I configure xcodebuild test commands for a macOS CI pipeline?▼

Configure xcodebuild test commands for a macOS CI pipeline by utilizing test plan configurations and GitHub Actions CI setup. This automates your unit and UI tests, ensuring macOS-specific edge cases like window server dependencies are evaluated.

Can I use XCTest UI testing for macOS menu bar and window interactions?▼

Yes, you can use XCTest UI testing for macOS menu bar and window interactions. It provides specific patterns for menu bar interaction, window queries, and accessibility identifier setup to reliably test AppKit interfaces.

Why do my macOS UI tests fail due to window server dependencies?▼

macOS UI tests fail due to window server dependencies when accessibility identifiers are missing or incorrectly configured. Implementing proper accessibility setup and following macOS-specific UI test patterns resolves these window server interaction issues.

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