Re: [PATCH v2 1/2] t7700: check post-condition in kept-pack test

[Taylor Blau <me@ttaylorr.com>]

On Fri, Mar 25, 2022 at 01:23:27PM -0400, Derrick Stolee wrote:
> > Since we've made sure "before" is a one-liner earlier, we could just
> > say
>
> > 		test_cmp before kept &&
> >
> > instead, no?
>
> 'before' contains a .idx name and 'kept' contains a .keep name,
> so this direct comparison does not work. We could do that
> additional check like this:
>
> 	kept_name=$(cat kept) &&
> 	echo ${kept_name%.keep}.idx >kept-idx &&
> 	test_cmp before kept-idx &&

I think keeping this kind of post-condition check pretty minimal is
favorable, since this is functionality of `git repack` (i.e., that `-a`
leaves you with one kept) that is already tested thoroughly elsewhere.

So I'd probably avoid checking the output altogether, but if we did want
to test it, I think something as quick and cheap as:

    test_line_count = 1 before

would do the trick.

Thanks,
Taylor