Re: [PATCH] t4069: test diff behavior with i-t-a paths

> On Mon, Aug 10, 2020 at 6:09 PM Junio C Hamano <gitster@pobox.com> wrote:
>> Eric Sunshine <sunshine@sunshineco.com> writes:
>> > This can be improved by taking advantage of the OID_REGEX variable
>> > defined by the test suite for matching an OID. So something like this
>> > would be even better:
>> >
>> >     cat >expect <<-\EOF &&
>> >     diff --git a/test-file b/test-file
>> >     index OID..OID 100644
>> >     --- a/test-file
>> >     +++ b/test-file
>> >     EOF
>> >     cat blueprint >test-file &&
>> >     git diff --ita-visible-in-index -- test-file >raw &&
>> >     sed "s/$OID_REGEX/OID/g" raw >actual &&
>> >     test_cmp expect actual
>>
>> OID_REGEX is [0-9a-f]{40} while what is used here is [0-9a-f]{1,}.
>> Unless --full-index is in use, they mean different things, no?
>
> You're right, of course. The regex in the original example I gave was
> too loose, matching even single hex letters in words like "index" and
> "test-file", so I wanted to tighten it up, but I botched it with
> OID_REGEX. Anyhow, I hope my examples convey the general idea (which
> needs a bit of tweaking from what I showed).