Why should I mock protocols instead of classes?

Protocols are more lightweight, support Sendable more naturally, and allow for a cleaner separation between interface and implementation in Swift.

Do I need to manually inject dependencies in production?

No, the pattern uses default parameters in initializers to automatically use production implementations unless a mock is specifically provided in tests.

How does this skill handle Swift concurrency?

It enforces Sendable conformance on protocols, making them safe to use across actor boundaries and structured concurrency.

What testing framework does this skill support?

It is optimized for the modern Swift Testing framework (import Testing) but the architectural patterns are fully compatible with XCTest.

Swift Protocol-Based DI & Testing

Name: Swift Protocol-Based DI & Testing
Author: affaan-m

byaffaan-m

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112,917

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安全与测试

Implements protocol-based dependency injection and mocking patterns to create highly testable Swift applications.

This skill provides a robust framework for architecting testable Swift code by abstracting external dependencies like file systems, network calls, and APIs behind focused protocols. It streamlines the creation of mock implementations and integrates seamlessly with the modern Swift Testing framework and Swift Concurrency (Sendable/Actors). By utilizing these patterns, developers can write deterministic tests that cover complex error paths and edge cases without performing actual I/O operations, ensuring code reliability across app environments, tests, and SwiftUI previews.

主要功能

01Production-ready dependency injection using default parameters

02Mock implementation templates for deterministic testing

03Protocol-based abstraction for file system and network access

04Modern Swift Testing framework integration with error path simulation

05Thread-safe architecture patterns using Sendable and Actors

06112,917 GitHub stars

使用场景

01Testing complex file system interactions without actual disk I/O

02Developing modular Swift code that works across apps and SwiftUI previews

03Simulating network failures and edge cases in a controlled environment

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add affaan-m/everything-claude-code swift-protocol-di-testing

For use in Claude.ai and ChatGPT

主要功能

01Production-ready dependency injection using default parameters

02Mock implementation templates for deterministic testing

03Protocol-based abstraction for file system and network access

04Modern Swift Testing framework integration with error path simulation

05Thread-safe architecture patterns using Sendable and Actors

06112,917 GitHub stars

使用场景

01Testing complex file system interactions without actual disk I/O

02Developing modular Swift code that works across apps and SwiftUI previews

03Simulating network failures and edge cases in a controlled environment

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add affaan-m/everything-claude-code swift-protocol-di-testing

For use in Claude.ai and ChatGPT