mobile-architecture

Structure a Flutter app with clean architecture by dividing it into Presentation, Domain, and Data layers using a feature-sliced approach. This separation isolates domain entities and data models, ensuring maintainable and testable use cases across features.

Feature-sliced structure in Flutter mobile apps organizes code by feature rather than layer, placing presentation, domain, and data components together. This structure enforces clear separation of concerns and improves maintainability as features grow.

Set up dependency injection in Flutter using GetIt and Injectable to wire repository patterns and use cases. This configuration supports a clean architecture by resolving dependencies automatically, keeping domain layers decoupled from data sources.

You need domain-driven design for your Flutter project when features grow complex and require strict separation of concerns. It provides a clear structure for domain entities and testable use cases, preventing code from becoming tangled and hard to maintain.

Clean architecture works with the repository pattern in Flutter by acting as the bridge between domain and data layers. Repositories abstract data sources, allowing domain use cases to remain testable and independent of external implementations.

The best way to test use cases in a Flutter clean architecture is by leveraging strict layer separation and dependency injection. Mock repository interfaces in the domain layer to isolate use cases, verifying business logic without external data dependencies.