Add tests for Sentry logging

[joris-burgers]

Icepeak logs errors to Sentry in case an exception occurs (see #52). It would be nice to see a number of tests that verify this functionality. These tests would somehow cause Icepeak to crash deliberately and verify that the correct errors are send to the Sentry DSN that is specified, for example by inspecting the records that are send from Icepeak. It should not be possible to let Icepeak crash when in production.

[NunoAlexandre]

for example by inspecting the records that are send from Icepeak

Hi @joris-burgers! Do you know or have in mind a way of doing so?

[joris-burgers]

Hi @NunoAlexandre, I was personally thinking about the module System.Log.Raven.Transport.Debug of the raven-haskell package we use for Icepeak. This would allow us to swap out the destination where Sentry would sent error messages, which we could then inspect.