Contract

Testing Strategies for Microservices and Monoliths Software teams today run both microservices and legacy monoliths. To keep quality high, tests must fit real work: fast feedback, reliable failures, and scalable coverage. The following approaches help you build a practical testing plan that stays effective as the system evolves. Planning by layers Think in three layers: unit, contract, and end-to-end. For each layer, define goals, keep tests small, and favor determinism. ...

APIs and Middleware: Designing Smooth System Interfaces Interfaces are the faces of a system. APIs describe what a service can do, while middleware provides the rules for how it is done. When designed well, these interfaces are easy to learn, hard to break, and quick to integrate with. When they are messy, developers waste time chasing errors that could have been avoided. Start with clear contracts. Define endpoints, data shapes, and status codes. Use stable schemas (JSON Schema, Protobuf) and keep backward compatibility in mind. A small versioning policy helps teams evolve without surprising consumers. Document changes and provide migration guidance so adapters and clients stay in sync. ...