Unit testing Web API routes and parameter validation

Let’s talk about routing. If you’ve ever developed a web application then you know the hassle you have with the constant “Resource not found” or “Multiple actions match the request” errors. What if I told you you could fix all this without ever having to open a browser? That’s right: we’ll unit test our routes! As an added bonus I’ll also show how you can unit test parameter validation since that’s probably one of the most important things to do when creating a (public) API.