swift-test-driven-development

Testing asynchronous Swift code requires specific patterns for async/await and actors to handle concurrency safely. This Skill provides testing patterns for concurrent Swift code, ensuring your async functions and actors are validated correctly within the Test-Driven Development cycle.

Test-Driven Development in a Swift application follows the Red-Green-Refactor cycle: write a failing test first, implement the minimal code to pass it, then refactor. This Skill guides you through this TDD cycle using Swift-specific tooling and the modern Swift Testing framework.

Making Swift code testable through dependency injection involves abstracting dependencies to allow mock injections during testing. This Skill demonstrates best practices for dependency injection patterns, ensuring your components are isolated and verifiable within your test suite.

XCUITest and snapshot testing are fully supported for validating SwiftUI views. This Skill outlines specific UI testing patterns for SwiftUI, including strategies for snapshot testing and XCUITest integration to drive your interface development through TDD.

The Swift Testing framework is fully supported and leveraged for writing modern, concise tests. This Skill integrates the framework directly into the Test-Driven Development workflow, allowing you to write robust tests natively within your Xcode environment.

Testing @MainActor code requires special patterns because UI-related operations must execute on the main thread, complicating async test execution. This Skill provides targeted patterns for testing actors and @MainActor isolated code, ensuring your concurrent Swift code remains thread-safe during validation.