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Test a Node API with confidence using Jest and supertest — write fast unit tests, integration-test HTTP endpoints, handle asynchronous code correctly, and isolate collaborators with mocks and fixtures. You will finish able to drive an API route through a red-green-refactor cycle and read coverage honestly.
Build real-time features in Node.js — a persistent, bidirectional channel between server and clients using the WebSocket protocol, the ws library and Socket.IO. You will finish able to build a live chat or notifications feature with events, rooms and broadcasting, then scale it across processes and combine it cleanly with a REST API.
Take a working Node.js application from your laptop to a resilient production deployment. You will configure it with environment variables, keep it alive with PM2, scale it across CPU cores, containerise it with Docker, and ship it to a VPS or PaaS with logging, health checks and zero-downtime reloads.
