Re: [RFC PATCH 0/3] Introduce clar testing framework

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On Wed, Jul 31, 2024 at 08:51:00AM -0700, Junio C Hamano wrote:
> Patrick Steinhardt <ps@xxxxxx> writes:
> 
> >   - The clar gives us the ability to pick which tests to run via command
> >     line parameters, which I personally like more than picking the
> >     specific binary to run.
> 
> One thing I am very unhappy about the current t/unit-tests/ is that
> the GIT_SKIP_TESTS mechanism is not effective at all.  If we can
> wrap clar's test selection syntax inside t/Makefile to work with
> GIT_SKIP_TESTS (or its superset equivalent), that would be a great
> plus.

Yeah, I guess that shouldn't be too hard.

> >   - The clar replaces some test assertions that we already have. They
> >     feel a bit more mature, but overall there aren't all that many
> >     assertions available. If we wanted to pick it up, then we'd likely
> >     have to add some more wrappers.
> 
> That is a slight bummer, as importing an externally developed one is
> with the hope that we won't have to enhance or maintain it, but
> we'll see how much burden it will be.

The clar exposes generic helpers like `cl_assert`, but also comparison
functions like `cl_assert_equal_$t` for pointers, integers and strings.
If anything is missing, it also exposes the building blocks to add
project-specific assertions so that it would be easy to add for example
`cl_assert_equal_oid`.

One thing I have been missing is non-equality comparisons like
`cl_assert_lt_i`/`cl_assert_gt_i`. But adding that to the clar itself
and upstreaming it should be easy enough, also because we know the
people maintaining it.

Other than that I think it's mostly fine and should serve as a good
baseline.

Patrick

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