Must be able to assert result from Polly in unit tests

There’s the noOp policy that is recommended to be used in tests. This class allows your code to bypass polly itself, ignoring timeouts for example (which is our case).

This is all great, but we must be able to assert the TimeoutRejectedException from polly. I guess what we want to do is to “fake” the noOp policy to always have a FinalException set. Is this possible?

In essence, we want to;

1. Write code dependent on the timeout policy.
2. Inject noOp policy in our tests
3. Make polly return TimeoutRejectedException, even though not applying the real timeout policy (because of obvious reasons)
4. Assert our code behaves correctly on the policy result. (We make decisions based on the FinalException property on the policy result)

I’ve tried to narrow this down as much as I can while still making it useful and hopefully understandable.

[reisenberger]

@jiimaho Added to the Polly [unit-testing documentation)(https://github.com/App-vNext/Polly/wiki/Unit-testing-with-Polly), to reflect this approach.

[reisenberger]

Close via #317