swift-testing

Automate creation and migration of Swift tests using the Swift Testing framework.

Updated Apr 30, 2026
One-click install
npx skills add https://github.com/onymchat/onym-ios --skill swift-testing-onymchat
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swift-testing
Source: https://github.com/onymchat/onym-ios/tree/main/.claude/skills/swift-testing
Command: npx skills add https://github.com/onymchat/onym-ios --skill swift-testing-onymchat

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Swift Testing provides a unified framework to write and migrate tests in Swift projects, enabling modern patterns like @Test, @Suite, #expect, parameterized tests, and UI test support, replacing ad-hoc testing approaches.

Core Features & Use Cases

  • Write and migrate tests using the Swift Testing framework
  • Parameterized tests, traits, withKnownIssue, test doubles, and mocking patterns
  • Organize tests into suites and reusable fixtures for scalable test architectures
  • Convert XCTest tests to Swift Testing and set up test organization

Quick Start

Install Swift Testing and begin migrating existing XCTest suites to the new Swift Testing framework.

Frequently Asked Questions about swift-testing

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

FAQPage Schema
How do I migrate XCTest code to the Swift Testing framework?

Migrate XCTest code to Swift Testing by replacing test classes and methods with @Test and @Suite macros, updating assertions to #expect, and converting data-driven tests into parameterized tests.

How do I write parameterized tests in Swift Testing?

Write parameterized tests in Swift Testing by applying arguments to the @Test macro, enabling the same test logic to execute across multiple inputs while enforcing parallel test execution.

Does Swift Testing work with Xcode 16 and modern Swift toolchains?

Swift Testing works with Xcode 16 and modern Swift toolchains, requiring the Swift Testing library to run @Test, @Suite, and #expect patterns including UI test integrations.

What is the best way to organize Swift Testing suites and reusable fixtures?

Organize Swift Testing suites and reusable fixtures by grouping related tests into @Suite structures, enabling scalable test architectures and better test organization across the project.

How does parallel test execution work with known issues in Swift Testing?

Parallel test execution in Swift Testing runs tests concurrently by default, while the withKnownIssue trait documents expected failures without breaking the build, with guidance on serialization for dependencies.

Can I use test doubles and mocking patterns with Swift Testing?

Swift Testing supports test doubles and mocking patterns, allowing you to isolate dependencies and simulate behaviors within @Test functions and organized @Suite structures.