Agent skill

Swift Testing

Standards for XCTest, Async Tests, and Test Organization

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/testing-hoangnguyen0403-agent-skills-standar-3

Metadata

Additional technical details for this skill

labels
swift testing xctest async-testing
triggers 
{
    "files": [
        "**/*Tests.swift"
    ],
    "keywords": [
        "XCTestCase",
        "XCTestExpectation",
        "XCTAssert"
    ]
}

SKILL.md

Swift Testing Standards

Priority: P0

Implementation Guidelines

XCTest Framework

  • Standard Naming: Prefix test methods with test (e.g., testUserLoginSuccessful).
  • Setup/Teardown: Use setUpWithError() and tearDownWithError() for environment management.
  • Assertions: Use specific assertions: XCTAssertEqual, XCTAssertNil, XCTAssertTrue, etc.

Async Testing

  • Async/Await: Mark test methods as async and use await directly inside them.
  • Expectations: Use XCTestExpectation for callback-based or delegate-based async logic.
  • Timeout: Always set reasonable timeouts for expectations to avoid hanging CI.

Test Organization

  • Unit Tests: Focus on logic isolation using mocks/stubs for dependencies.
  • UI Tests: Test user flows using XCUIApplication and accessibility identifiers.
  • Coverage: Aim for high coverage on critical business logic and state transitions.

Anti-Patterns

  • Thread Sleeps: **No Thread.sleep**: Use expectations or await.
  • Force Unwrapping in Tests: **No user!**: Use XCTUnwrap(user) for better failure messages.
  • Missing Assertions: **Tests must assert**: A test that only runs code is not a test.

References

  • XCTest Patterns & Async Tests

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