[TIP] Strategies for testing exec

[Alex Gaynor]

Title pretty much says it all, I've got some code that execs, I want to
write tests for it. So far I'm just having my tests fork, which sucks but
works ok. I've also thought about mocking exec, but that seems brittle
(although maybe not, exec is kind of a well defined API boundary. I'm
wondering if anyone has any suggestions?

Alex

PS: Motivation for moving away from fork is that py.test --looponfail leaks
child processes, and I'm getting tired of cleaning up zombies every 5
minutes :D

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