Testing Azure Functions: Unit, Integration, and Local

Azure Functions for .NET Developers: Series Part 1: Why Azure Functions? Serverless for .NET Developers Part 2: Your First Azure Function: HTTP Triggers Step-by-Step Part 3: Beyond HTTP: Timer, Queue, and Blob Triggers Part 4: Local Development Setup: Tools, Debugging, and Hot Reload Part 5: Understanding the Isolated Worker Model Part 6: Configuration Done Right: Settings, Secrets, and Key Vault Part 7: Testing Azure Functions: Unit, Integration, and Local ← you are here Part 8: Deploying to Azure: CI/CD with GitHub Actions (coming next week) Where do you draw the line between what needs a full Azure connection and what can be tested with a plain class instantiation? The isolated worker model makes the answer concrete: the function class is just wiring. Everything testable lives in a service class that knows nothing about Azure. Most testing pain comes from not drawing that line early enough. The design decision that makes testing possible Consider a function that does its own work: p