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swift-testing

Write Swift unit tests using @Test and #expect syntax.

Updated Jun 5, 2026
Search Tags:#testing#migration#swift#async#xctest#assertions
One-click install
npx skills add https://github.com/harshav167/build-ios-apps --skill swift-testing-harshav167
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-testing
Source: https://github.com/harshav167/build-ios-apps/tree/main/skills/swift-testing
Command: npx skills add https://github.com/harshav167/build-ios-apps --skill swift-testing-harshav167

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Swift Testing provides a modern framework for Swift testing that replaces legacy XCTest patterns and streamlines writing reliable tests.

Core Features & Use Cases

  • @Test and #expect enable declarative, isolated tests with clear failure reporting.
  • @Suite and test scoping offer flexible organization and per-test fixtures without shared mutable state.
  • Migration guidance covers converting XCTest assertions, UI tests, known issues, attachments, and exit testing.

Quick Start

Write your first test with @Test and #expect to validate behavior immediately.

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 assertions to Swift Testing?▼

To migrate XCTest assertions to Swift Testing, replace legacy assertion methods with the #expect macro. This modern DSL provides declarative, isolated tests with clear failure reporting while replacing XCTest for new unit tests.

What is the best way to write async tests in Swift Testing?▼

Writing async tests in Swift Testing uses the @Test attribute to support asynchronous execution natively. You can validate asynchronous behavior directly without XCTest expectations, streamlining reliable test creation.

Can I use Swift Testing to organize tests without shared mutable state?▼

Yes, you can use @Suite and test scoping to organize Swift Testing suites. This approach offers flexible organization and per-test fixtures, eliminating shared mutable state across your unit tests.

Does Swift Testing support known issues and attachments for Xcode 14+?▼

Swift Testing supports known issues, attachments, and exit testing for Swift projects in Xcode 14+. This availability gating ensures you can document expected failures and manage test artifacts effectively.

Why should I use @Test and #expect instead of XCTest for new Swift tests?▼

Using @Test and #expect instead of XCTest enables declarative, isolated tests with clear failure reporting. This modern DSL solves maintainability issues by replacing legacy patterns for new unit tests.

How do I set up per-test fixtures when migrating to Swift Testing?▼

Setting up per-test fixtures during Swift Testing migration uses @Suite and test scoping. This configuration provides flexible organization without relying on shared mutable state like legacy XCTest setups.

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