How do I handle asynchronous code in Swift Testing?

This skill provides patterns for using async/await directly in test signatures and utilizing the 'confirmation' tool for verifying that callbacks are executed correctly.

When should I use #require instead of #expect?

Use #require for preconditions where the test must stop immediately if the check fails; use #expect for standard assertions to allow the test to continue and report multiple failures in a single run.

How does Swift Testing differ from XCTest?

Swift Testing uses a modern macro-based approach (@Test vs test... prefix) and supports parallel execution by default with better async/await integration and more concise assertions.

Can I use this skill to migrate existing XCTest projects?

Yes, this skill includes specific assertion conversion tables and migration patterns to help you systematically transition legacy XCTest code to the new framework.

Swift Testing for Claude Code

Name: Swift Testing for Claude Code
Author: johnrogers

byjohnrogers

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安全与测试

Implements modern Swift Testing patterns to build robust, parallel, and macro-based test suites for Apple platforms.

This skill empowers Claude to write modern Swift code tests using the Swift Testing framework instead of legacy XCTest. It provides comprehensive guidance on using macros like @Test and @Suite, correctly implementing soft and hard assertions with #expect and #require, and handling complex scenarios such as parameterized tests and asynchronous callbacks. Whether you are starting a new project or migrating hundreds of tests from XCTest, this skill ensures your test code follows Apple's latest best practices for state isolation, parallel execution, and concise syntax.

主要功能

01Migrate legacy XCTest suites to modern Swift Testing macros

02Handle asynchronous tests and callbacks using native async/await and confirmations

03Apply state isolation and serialization strategies for thread-unsafe tests

0461 GitHub stars

05Implement parameterized testing with zip-based argument pairing

06Standardize error testing using type-safe #expect(throws:) patterns

使用场景

01Modernizing legacy iOS/macOS test suites to the new Swift Testing framework

02Writing high-performance parallelized tests with built-in macro support

03Designing complex parameterized tests to validate multiple input combinations efficiently

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add johnrogers/claude-swift-engineering swift-testing

For use in Claude.ai and ChatGPT

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