test-contract

Generate reusable protocol contract test suites for implementation conformance.

Updated Jun 2, 2026

Search Tags:#testing #validation #protocol #swift #test-generation #contract-tests #data-store

Ready to run

npx skills add https://github.com/ano4l/SiteRent --skill test-contract-ano4l

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-contract
Source: https://github.com/ano4l/SiteRent/tree/main/skills/testing/test-contract
Command: npx skills add https://github.com/ano4l/SiteRent --skill test-contract-ano4l

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Protocol conformance drift across implementations can cause unpredictable behavior. This skill provides contract-based tests to enforce a single source of truth for a protocol's expected behavior.

Core Features & Use Cases

Define contract behaviors for protocols by specifying required methods, properties, and invariants.
Generate reusable test suites that any implementation must pass, enabling safe swapping of components.
Validate implementations across different storage or service backends, ensuring consistent behavior.

Quick Start

Define your protocol, implement it in a concrete class, and run the contract tests to confirm conformance.

Frequently Asked Questions about test-contract

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

FAQPage Schema

How do I write contract tests for Swift protocol conformance across multiple implementations?▼

Contract tests for Swift protocol conformance verify that any implementation adheres to a shared specification. You define protocol behaviors and generate reusable test suites that validate implementations like InMemoryDataStore and SQLiteDataStore to ensure consistent behavior.

What are protocol contract tests and when do I need them for swappable components?▼

Protocol contract tests enforce a single source of truth for expected behavior when designing swappable components. You need them when multiple implementations exist, such as real, mock, or in-memory backends, to prevent unpredictable behavior caused by conformance drift across environments.

How do I validate that InMemoryDataStore and SQLiteDataStore share the same protocol behaviors?▼

To validate InMemoryDataStore and SQLiteDataStore, you define required methods, properties, and invariants for the protocol, then generate a reusable test suite. Running both implementations against these contract tests confirms they exhibit consistent behavior across different storage backends.

Can I use contract tests to verify mock implementations match real service backends in Swift?▼

Yes, contract tests verify mock implementations match real service backends by validating them against the same protocol specification. This ensures that swapping components across different environments does not cause unpredictable behavior or break expected invariants.

Do I need any specific testing dependencies to generate protocol contract test suites?▼

No specific testing dependencies are required to generate protocol contract test suites. The skill operates independently to define protocol behaviors and produces reusable tests that validate any concrete class implementation against the shared specification without external libraries.