[apparmor] KUnit and experimental e2e tests

[Seth Arnold]

On Thu, Mar 28, 2019 at 01:13:54PM -0700, Eric Chiang wrote:
> Would anyone be opposed to setting up a gitlab.com/apparmor/linux
> mirror, creating a kunit branch and configuring GitLab CI? Short term,

I really like this idea.

> Separately, I've been working on an experimental tool for writing e2e
> tests for arbitrary apparmor_parser / kernel combinations leveraging
> QEMU. I'd like to start some discussion if it'd be a good addition to
> the existing tests/regression/apparmor suite. Would it be okay to open
> source that under gitlab.com/apparmor/apparmor_e2e?

I also really like this idea. (This is something I've wanted to do for
years but I'm too easily distracted by shiny things.)

I've thought that there's several axes that would be worthwhile testing:

Starting from a distro that has *no* apparmor:
- testing "arbitrary" apparmor versions (master, maybe tips of a few
  branches)
- testing "arbitrary" kernel versions (linux-next, linus, maybe a stable
  or two)

A full N*M layout would be awesome.

Starting from the distros that have strong apparmor support:
- testing their kernels with "arbitrary" apparmor versions
- testing their apparmor versions with "arbitrary" kernels

D*N*1 and D*1*M layouts ought to be good.

The arbitrary kernels version would address the most likely way for most
apparmor users to experience problems.

Maybe these don't all fit into the same tool, but I thought I'd mention it
just in case they do.

Thanks
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