Injecting the whole Gatherer struct was not necessary for testing
since DataForCertificate is now fully unit-tested. With that, we
can mock the Gatherer.Evaluate function. Since there is no reason
to inject a full Gatherer object into the trigger controller, I chose
to inject a simple policies.Func. I named the function "shouldReissue"
since this is exactly what this function does.
I also refactored the test cases to use the same gen.Certificate
that we use in the rest of the codebase.
Signed-off-by: Maël Valais <mael@vls.dev>
71e707387a