Bruce Richardson <bruce.richard...@intel.com> writes:

> On Wed, Sep 27, 2023 at 11:31:07AM +0200, David Marchand wrote:
>> On Wed, Sep 27, 2023 at 10:27 AM Bruce Richardson
>> <bruce.richard...@intel.com> wrote:
>> > On Wed, Sep 27, 2023 at 08:30:05AM +0200, David Marchand wrote:
>> > > On Tue, Sep 26, 2023 at 5:01 PM Aaron Conole <acon...@redhat.com> wrote:
>> > > > David Marchand <david.march...@redhat.com> writes:
>> > > > > On Tue, Sep 19, 2023 at 10:36 AM Bruce Richardson
>> > > > > <bruce.richard...@intel.com> wrote:
>> > > > >> > > To help ensure that we don't have "orphaned" tests not in any 
>> > > > >> > > test
>> > > > >> > > suites we can add the following checks:
>> > > > >> > >
>> > > > >> > > * In developer-mode builds, emit a warning for each test 
>> > > > >> > > defined using
>> > > > >> > >   REGISTER_TEST_COMMAND
>> > > > >> > > * In checkpatches, add a check to prevent the addition of new 
>> > > > >> > > tests
>> > > > >> > >   using the REGISTER_TEST_COMMAND macro
>> > > > >> > >
>> > > > >> > > Bruce Richardson (2):
>> > > > >> > >   app/test: emit warning for tests not in a test suite
>> > > > >> > >   devtools: check for tests added without a test suite
>> > > > >> > >
>> > > > >> > >  app/test/suites/meson.build   | 13 ++++++++++++-
>> > > > >> > >  buildtools/get-test-suites.py | 12 +++++++++---
>> > > > >> > >  devtools/checkpatches.sh      |  8 ++++++++
>> > > > >> > >  3 files changed, 29 insertions(+), 4 deletions(-)
>> > > > >> >
>> > > > >> > The "non_suite_tests" testsuite returned by
>> > > > >> > buildtools/get-test-suites.py is a bit strange, as it is not a
>> > > > >> > testsuite from meson pov.
>> > > > >>
>> > > > >> Yeah, it is a bit strange, and I'm open to new ideas on other 
>> > > > >> solutions. I
>> > > > >> did it that way to avoid having yet another script to scan the 
>> > > > >> files - I
>> > > > >> figured it was faster (in terms of runtime, not dev time) to do the
>> > > > >
>> > > > > I had figured it was "faster dev time" that won :-).
>> > > > > I am fine with it, I don't expect more complications in this area in 
>> > > > > the future.
>> > > > >
>> > > > >
>> > > > >> scanning when the files are already being opened and processed by 
>> > > > >> this one.
>> > > > >>
>> > > > >> Of course, if we can get the un-suitened [:-)] test cases down to 
>> > > > >> zero, we
>> > > > >> can theoretically drop this check in future, and  just use the 
>> > > > >> checkpatch
>> > > > >> one.
>> > > > >
>> > > > > Well, that's still a question that nobody seems to comment on.
>> > > > >
>> > > > > What should we do with tests that don't enter one of those 
>> > > > > testsuites,
>> > > > > and are not invoked by the CI?
>> > > > >
>> > > > > Though we may be removing some level of coverage, I am for
>> > > > > cleaning/unused dead code.
>> > > >
>> > > > I guess it does require actually looking at these tests and classifying
>> > > > them to either put them into the proper suites.  As of now, we aren't
>> > > > really removing coverage if they aren't being run - but are any
>> > > > maintainers or developers actually running them?
>> > >
>> > > Could we go a step further than Bruce runtime warning (which is at the
>> > > meson level and does not impact running the test)?
>> > > Perhaps have those orphaned tests fail unless their test names are
>> > > provided in a env variable like
>> > > DPDK_TRUST_ME_I_WILL_SUBMIT_A_PATCH_FOR_THIS_TEST (naming is hard
>> > > ;-))?
>> > >
>> > > With a systematic failure, there is less chance that
>> > > developers/maintainers miss the situation.
>> > > If those developers/maintainers simply waive the warning with the env
>> > > variable and don't send a patch, well.. too bad.
>> > >
>> > > After a release or two, if we don't hear from anyone, we can start
>> > > removing the unused one.
>> > >
>> > I think that seems a littel severe at this point.
>> >
>> > The one gap we have right now, as far as I can see, is actually explaining
>> > what the various suite types are, so that developers can choose the right
>> > one for their test(s).  We may even need a couple more if some tests do not
>> > fit into the existing categories. Once that is done, we should then start
>> > looking for tests that are obsolete and can be removed.
>> >
>> > If we do already have documentation on the various suites and how to use
>> > them, apologies for my ignorance, and perhaps someone could post a link
>> > here.
>> 
>> We have some guidelines but I agree the testsuites are not described.
>> https://doc.dpdk.org/guides/contributing/unit_test.html
>> 
> I also see I missed updating the reference to REGISTER_TEST_COMMAND in the
> docs. I'll do a patch for a doc update for that.

Yeah, we should do some kind of breakout definition of the test suites.
I will try to cook a patch, but the suites themselves are a bit
ambiguous at the moment.  Gotta start somewhere, though.

> /Bruce

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