Re: [PATCH 4/6] t-reftable-stack: use reftable_ref_record_equal() to compare ref records

[Chandra Pratap <chandrapratap3519@xxxxxxxxx>]

On Wed, 7 Aug 2024 at 14:11, Patrick Steinhardt <ps@xxxxxx> wrote:
>
> On Tue, Aug 06, 2024 at 07:43:40PM +0530, Chandra Pratap wrote:
> > diff --git a/t/unit-tests/t-reftable-stack.c b/t/unit-tests/t-reftable-stack.c
> > index 14909b127e..0c15e654e8 100644
> > --- a/t/unit-tests/t-reftable-stack.c
> > +++ b/t/unit-tests/t-reftable-stack.c
> > @@ -145,7 +145,7 @@ static void t_reftable_stack_add_one(void)
> >
> >       err = reftable_stack_read_ref(st, ref.refname, &dest);
> >       check(!err);
> > -     check_str("master", dest.value.symref);
> > +     check(reftable_ref_record_equal(&ref, &dest, GIT_SHA1_RAWSZ));
> >       check_int(st->readers_len, >, 0);
>
> I think the change itself is sensible as long as we have tests that
> verify that `reftable_ref_record_equal()` itself behaves as expected. I
> don't think we have such tests anywhere though, uncovering a test gap.

We _do_ test reftable_record_equal (which is a wrapper for
reftable_ref_record_equal in the case of ref records) in the
recently ported t-reftable-record test. Here is the test exercising
this function in unit-tests/t-reftable-record.c:

static void t_reftable_ref_record_comparison(void)
{
  struct reftable_record in[3] = {
    {
      .type = BLOCK_TYPE_REF,
      .u.ref.refname = (char *) "refs/heads/master",
      .u.ref.value_type = REFTABLE_REF_VAL1,
    },
    {
      .type = BLOCK_TYPE_REF,
      .u.ref.refname = (char *) "refs/heads/master",
      .u.ref.value_type = REFTABLE_REF_DELETION,
    },
    {
      .type = BLOCK_TYPE_REF,
      .u.ref.refname = (char *) "HEAD",
      .u.ref.value_type = REFTABLE_REF_SYMREF,
      .u.ref.value.symref = (char *) "refs/heads/master",
    },
  };

  check(!reftable_record_equal(&in[0], &in[1], GIT_SHA1_RAWSZ));
  check(!reftable_record_cmp(&in[0], &in[1]));

  check(!reftable_record_equal(&in[1], &in[2], GIT_SHA1_RAWSZ));
  check_int(reftable_record_cmp(&in[1], &in[2]), >, 0);

  in[1].u.ref.value_type = in[0].u.ref.value_type;
  check(reftable_record_equal(&in[0], &in[1], GIT_SHA1_RAWSZ));
  check(!reftable_record_cmp(&in[0], &in[1]));
}