On 9 June 2018 at 11:56, Ævar Arnfjörð Bjarmason <ava...@gmail.com> wrote: > > On Sat, Jun 09 2018, Martin Ågren wrote: > >> On 9 June 2018 at 00:41, Ævar Arnfjörð Bjarmason <ava...@gmail.com> wrote: >>> The "log" family of commands does its own parsing for --abbrev in >>> revision.c, so having dedicated tests for it makes sense. >> >>> +for i in $(test_seq 4 40) >> >> I've just been skimming so might have missed something, but I see >> several instances of this construct, and I wonder what this brute-force >> approach really buys us. An alternative would be, e.g., "for i in 4 23 >> 40". That is, min/max and some arbitrary number in between (odd because >> the others are even). >> >> Of course, we might have a bug which magically happens for the number 9, >> but I'd expect us to test for that only if we have some reason to >> believe that number 9 is indeed magical. > > Good point, I'll change this in v2, or at least guard it with > EXPENSIVE. I hacked it up like this while exhaustively testing things > during development, and discovered some edge cases (e.g. "0" is special > sometimes).
Ah, "useful during hacking" explains why you did it like this. Of your two approaches, I'd probably favour "make it cheaper" over "mark it as EXPENSIVE". Nothing I feel strongly about. >> Also, 40 is of course tied to SHA-1. You could perhaps define a variable >> at the top of this file to simplify a future generalization. (Same for >> 39/41 which are related to 40.) > > I forgot to note this in the commit message, but I intentionally didn't > guard this test with the SHA1 prereq, there's nothing per-se specific to > SHA-1 here, it's not a given that whatever our NewHash is that we won't > use 40 characters, and the rest of the magic constants like 4 and 7 is > something we're likely to retain with NewHash. I'd tend to agree about not marking this SHA1. > Although maybe we should expose GIT_SHA1_HEXSZ to the test suite. It seems like brian's "test_translate"-approach [1] would be a good choice of tool for this. That is, you'd just define something at the top of this file for now, then once that tool is in place, a one-line change could get "hexsz" from `test_translate` instead. [1] https://public-inbox.org/git/20180604235229.279814-2-sand...@crustytoothpaste.net/ Martin
