Hi Jaromir,

thanks for writing these tests! Just a few comments here:

- #testTerminateInEnsure uses underscore assignments. This is a deprecated syntax and apparently, in current Trunk images even disabled by default. Without turning on my #allowUnderscoreAsAssignment preference, I cannot even run the test in my image. Could you please convert this to modern `:=` assignments?

- Also, there is no guarantee that in #testTerminateInEnsure, process will not have completed earlier, is it? This totally depends on the speed & implementation of the VM. We don't want this test to fail when running on a NSA machine or on your coffee machine in 2050, do we? ;P Did you consider using semaphores instead? :-)

- #testTerminateInTerminate is very fancy. :D

Best,
Christoph