flutter-sdk-wrapper-test-pattern

What problem does it solve?

It solves the problem of untestable Flutter services that depend on static native SDK calls, which are difficult to mock, hard to isolate, and often require real devices or live API access.

Core Features & Use Cases

• Wrapper Interface Design: Defines a minimal abstract wrapper around only the SDK methods a service actually uses.
• Dependency Injection Refactor: Reworks the service to accept a production wrapper by default while allowing mock implementations in tests.
• Mocktail-Based Verification: Supports deterministic unit tests for success cases, error handling, and listener callbacks without relying on static calls.
• Use Case: A Flutter app integrating RevenueCat can replace direct Purchases calls with an injectable wrapper and verify premium entitlement logic in pure unit tests.

Quick Start

Ask for a refactor of a Flutter service that uses a static native SDK so it accepts an injectable wrapper and includes mocktail unit tests for both success and failure paths.