swift-testing

Migrate Swift test suites from XCTest to Swift Testing patterns.

34|6|Updated Feb 10, 2026

Search Tags:#testing #test doubles #swift #async testing #fixtures #snapshot testing #xctest migration

Ready to run

npx skills add https://github.com/Viniciuscarvalho/swift-code-reviewer-skill --skill swift-testing-viniciuscarvalho

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swift-testing
Source: https://github.com/Viniciuscarvalho/swift-code-reviewer-skill/tree/main/skills/swift-testing
Command: npx skills add https://github.com/Viniciuscarvalho/swift-code-reviewer-skill --skill swift-testing-viniciuscarvalho

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps teams modernize and improve Swift test suites by replacing fragile XCTest patterns with clear, reliable Swift Testing guidance.

Core Features & Use Cases

Swift Testing adoption with @Test, @Suite, #expect, and #require.
Migration support from XCTest to Swift Testing.
Best practices for async tests, parameterized tests, test doubles, fixtures, integration testing, snapshot testing, and dump snapshots.
Real-world use cases include building new tests, refactoring legacy suites, organizing test files, and choosing the right fixture or test double strategy.

Quick Start

Use the swift-testing skill to analyze my Swift project and recommend the best test structure, fixtures, async patterns, and migration steps for the files I share.

Frequently Asked Questions about swift-testing

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

FAQPage Schema

How do I migrate my XCTest suite to Swift Testing?▼

Migrating from XCTest to Swift Testing requires replacing XCTestCase with @Suite structures, mapping test methods to @Test functions, adopting #expect and #require assertions, and applying referenced guidance for organizing files and updating async behavior.

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

Structuring async tests in Swift Testing uses the @Test attribute with async closures directly, applying Arrange-Act-Assert patterns and F.I.R.S.T. principles to validate asynchronous behavior without needing XCTest expectations or waiters.

How do parameterized tests work in Swift Testing?▼

Parameterized tests in Swift Testing work by passing arguments directly into the @Test macro, allowing the same test logic to run across multiple inputs, replacing XCTest data-driven loops and supporting fixture-driven scenarios.

Does Swift Testing support snapshot testing for SwiftUI views?▼

Yes, Swift Testing supports snapshot testing for SwiftUI views by applying dump snapshot patterns and fixture strategies, integrating within the @Test structure to capture and compare UI states without XCTest dependencies.

When should I use test doubles in Swift Testing?▼

Use test doubles in Swift Testing when isolating dependencies in unit or integration tests, choosing the right fixture or double strategy based on the specific scenario requirements and F.I.R.S.T. testing principles.

Can I organize test suites in Swift Testing without XCTest?▼

Yes, you can organize test suites in Swift Testing without XCTest by using @Suite structures to group related @Test functions, applying modern patterns for file organization, fixture management, and Arrange-Act-Assert structuring.