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swift-protocol-di-testing

Abstract Swift external dependencies behind focused protocols for deterministic testing.

Updated Mar 31, 2026
Search Tags:#testing#concurrency#swift#mocking#unit-testing#protocols#dependency-injection
One-click install
npx skills add https://github.com/GGEdu/claude-god-mode-template --skill swift-protocol-di-testing-ggedu
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-protocol-di-testing
Source: https://github.com/GGEdu/claude-god-mode-template/tree/main/skills/swift-protocol-di-testing
Command: npx skills add https://github.com/GGEdu/claude-god-mode-template --skill swift-protocol-di-testing-ggedu

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Swift code often suffers from hard-to-test external dependencies like file systems, networks, and APIs. Abstracting these behind small, focused protocols enables deterministic testing without I/O.

Core Features & Use Cases

  • Define small, focused protocols for external concerns.
  • Provide production defaults and mock implementations for tests.
  • Use in Swift concurrency contexts to test actors and async flows.

Quick Start

Configure your project to inject mock and production implementations behind focused protocols to enable deterministic tests.

Frequently Asked Questions about swift-protocol-di-testing

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

FAQPage Schema
How do I unit test Swift code that depends on the file system or network?▼

To unit test Swift code with external dependencies, abstract file system and network access behind small, focused protocols. This enables deterministic testing without I/O by injecting mock implementations during your test runs.

How does dependency injection work with Swift concurrency and async actors?▼

Dependency injection in Swift concurrency uses focused protocols to abstract external APIs for actors and async flows. You inject mock protocol implementations into tests to achieve deterministic async testing without real I/O operations.

What is the best way to mock external dependencies for SwiftUI previews?▼

The best way to mock external dependencies for SwiftUI previews is defining minimal protocols for external concerns. You then inject lightweight mock implementations conforming to these protocols to render deterministic preview states.

How do you structure production and mock implementations for protocol testing?▼

Structuring protocol testing requires defining minimal protocols for external dependencies, providing default production implementations for the app, and creating mock counterparts for tests. This separation enables deterministic unit testing.

Can I use protocol abstractions to test async flows in Swift apps?▼

Yes, you can use protocol abstractions to test async flows in Swift apps. By defining small protocols for external dependencies, you inject mock implementations to test actors and async flows deterministically across app and test contexts.

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