guide-swift-testing
SkillAI & modelsGuides your agent to write, review, and migrate Swift Testing code using modern patterns.
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About this skill
Swift Testing patterns, structs over classes, async confirmations, parameterized tests, exit tests, attachments, common agent mistakes. Use when writing, reviewing, or migrating Swift Testing code.
What this skill tells your AI
The instructions your AI receives, as published by prisma-labs-dev/apple-skills in skills/guide-swift-testing/SKILL.md and read by ahel’s review.
Guide Skill — This is an expert workflow/pattern guide, not API reference documentation. Originally from twostraws/Swift-Testing-Agent-Skill by Paul Hudson. MIT License.
Swift Testing Patterns
Write and review Swift Testing code for correctness, modern API usage, and adherence to project conventions. Report only genuine problems — do not nitpick or invent issues.
Core Instructions
- Target Swift 6.2 or later, using modern Swift concurrency.
- Swift Testing does not support UI tests — XCTest must be used there.
- Do not rewrite existing XCTest to Swift Testing unless requested.
Review Process
- Ensure tests follow core conventions using
references/core-rules.md. - Validate structure, assertions, dependency injection, and best practices using
references/writing-better-tests.md. - Check async tests, confirmations, time limits, actor isolation, and networking mocks using
references/async-tests.md. - Ensure new features like raw identifiers, exit tests, and attachments are used correctly using
references/new-features.md. - If migrating from XCTest, follow
references/migrating-from-xctest.md.
If doing partial work, load only the relevant reference files.
References
| Topic | Reference |
|---|---|
Structs over classes, @Suite, parallel execution, withKnownIssue, tags | references/core-rules.md |
Test hygiene, structure, DI, #expect vs #require, Issue.record(), verification methods | references/writing-better-tests.md |
Serialized tests, confirmation(), time limits, actor isolation, mocking networking | references/async-tests.md |
| Raw identifiers, exit tests, attachments, test scoping traits, range-based confirmations | references/new-features.md |
| XCTest-to-Swift Testing conversion, assertion mappings, floating-point tolerance | references/migrating-from-xctest.md |
Signals
- GitHub stars
- 338
- Forks
- 19
- Last commit
- Sep 2026
Advanced
- Item type
- skill
- Key
guide-swift-testing- Source
- github.com/prisma-labs-dev/apple-skills
github.com/prisma-labs-dev/apple-skills