519572 - Ensure test frameworks expect subprocesses

Status: NEW

(Testing :: Mochitest, defect)

Description

[Benjamin Smedberg]

If a browser hangs, the test frameworks currently just kill it off. Now that browsers are going to launch subprocesses, we need to make sure:

* if the process exits normally, there aren't any subprocesses left around
* if the process is killed off, there aren't orphan processes which could cause weird problems on future test runs

Not sure exactly where to file this, but it applies to mochitests/reftests/xpcshelltests, I think.

Comment 1

[Jeff Hammel]

We now do have mozprocess largely for this purpose (see, e.g., https://github.com/mozilla/mozbase/tree/master/mozprocess because I don't know a better reference).  It is certainly not complete and is underdocumented, undertested, and underutilized, but WIP.