skills.rest
mbadoz
mbadozCOMMUNITY
Explore all skills by this author →
GitHub

swift-protocol-di-testing

Define small Swift protocols to isolate external dependencies for deterministic tests.

2|Updated Apr 5, 2026
Search Tags:#testing#concurrency#swift#mocking#unit-testing#protocols#dependency-injection
One-click install
npx skills add https://github.com/mbadoz/mbadoz-skills --skill swift-protocol-di-testing-mbadoz
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-protocol-di-testing
Source: https://github.com/mbadoz/mbadoz-skills/tree/main/plugins/built-planner/skills/built-planner/references/skills/swift-protocol-di-testing
Command: npx skills add https://github.com/mbadoz/mbadoz-skills --skill swift-protocol-di-testing-mbadoz

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Protocol-based dependency injection for testable Swift code enables deterministic tests by abstracting external dependencies behind small, focused protocols, allowing tests to run without I/O.

Core Features & Use Cases

  • Define small, focused protocols for external concerns (file systems, networks, APIs).
  • Provide production default implementations and mock objects for testing.
  • Inject dependencies to write deterministic, testable Swift modules across app, test, and previews.

Quick Start

Introduce small, focused protocols for external services and inject production or mock implementations to enable deterministic, testable Swift code.

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 write deterministic Swift tests for modules that interact with the network or file system?▼

Deterministic Swift tests require abstracting external dependencies behind small, focused protocols, allowing modules to run without I/O using injected mock implementations.

How does protocol-based dependency injection work for Swift unit testing?▼

Protocol-based dependency injection for Swift unit testing defines small protocols for external services, providing production implementations for the app and mocks for tests to isolate logic.

Can I use protocol dependency injection for SwiftUI previews and concurrent Swift code?▼

Protocol dependency injection applies across app, test, and SwiftUI previews, satisfying dependency injection patterns with Sendable conformance to support safe concurrency.

What's the best way to isolate external APIs in Swift to enable testability?▼

The best way to isolate external APIs in Swift is defining focused protocols for external concerns and injecting production defaults or mock objects to ensure deterministic test execution.

Why do my Swift unit tests fail when running against live network or file system dependencies?▼

Swift unit tests fail against live dependencies due to I/O variability; defining small protocols and injecting mocks isolates external concerns to produce deterministic test outcomes.

Do I need Sendable conformance when mocking protocols for Swift concurrency testing?▼

Sendable conformance is required when applying dependency injection patterns to protocols, ensuring mocks and production defaults work safely within Swift concurrency contexts.

Related Skills

Explore More Software Engineering Skills→
multiplex-aimultiplex-ai
2

swift-protocol-di-testing

Define protocol-based abstractions to isolate Swift external dependencies for deterministic unit testing.

Official
Advanced
EmilLindforsEmilLindfors
2

mock-strategy-guide

Create mock implementations for testing Rust code with external dependencies.

Community
Intermediate
arimunandararimunandar
1

iOS Testing

Generate unit, UI, and worker tests for iOS VIP+W architectures using XCTest.

Community
Advanced
blueman82blueman82
1

convergence-debugger

Diagnose deliberation convergence failures and output actionable remediation reports.

Community
Advanced