test-contract

Contract tests validate that all implementations conform to a single protocol contract in Swift. You define a reusable protocol contract and run a shared test suite against every implementation to verify they exhibit the same behaviors for common CRUD-like operations.

You need contract tests when safely swapping multiple data store implementations, such as real, mock, or in-memory versions. They ensure every implementation conforms to the same protocol contract and exhibits identical behaviors for common operations.

Create your protocol contract, then apply the provided templates to build a contract test suite. Run this shared suite against every implementation to automatically validate conformance and ensure safe exchange of components.

Yes, contract tests support multiple implementations including real, mock, and in-memory Swift data stores. This allows you to safely exchange implementations while ensuring they all conform to the specified protocol behaviors.

Automating protocol conformance validation involves defining a reusable protocol contract and generating per-implementation test suites. This automatically verifies that all implementations conform to the same behavioral contract for common operations.

No external testing frameworks are required as dependencies. The skill provides built-in templates and guidance for building contract test suites that validate protocol conformance directly within your Swift environment.