[v4 2/4] evr: Add tests

[Fabian Maurer]

> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> https://testbot.winehq.org/JobDetails.pl?Key=33066
> 
> Your paranoid android.
> 
> 
> === build (build) ===
> Make failed

Again, no idea what's causing this. Works fine when downloading the patch.diff 
and compiling on my own.
It doesn't seem to find the GUIDs, how should I work around that issue?