How can I unit test a Windows Service?

Question

.NET Framework: 2.0 Preferred Language: C#

I am new to TDD (Test Driven Development).

First of all, is it even possible to unit test Windows Service?

Answer 1

I would use the windows service class (the one you run when you start/stop the service) sort of like a proxy to your real system. I don't see how the code behind your service should be any different from any other programming. The onStart and onStop methods are simply events being fired, like pushing a button on a GUI.

So your windows service class is a very thin class, comparable to a windows form. It calls your business logic/domain logic, which then does what it's supposed to do. All you have to do is make sure the method(s) you're calling in your onStart and onStop are working like they're supposed to. At least that's what I would do ;-)