Re: [PATCH 4/4] tests: get rid of $_x05 from the test suite

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Ævar Arnfjörð Bjarmason  <avarab@xxxxxxxxx> writes:

> Remove the last users of the $_x05 variable from the tests. It turns
> out that all of these tests can be rewritten unambiguously to simply
> use [0-9a-f]* instead.

I am unsure about the "unambiguously" part, e.g.

> -	sed -e "s/ $_x05[0-9a-f]*	/ X	/" <current >check &&
> +	sed -e "s/ [0-9a-f]*	/ X	/" <current >check &&

does't the preimage say "we expect at least 5 hexdigits to be shown
here"?  The postimage lets even an empty string to pass. 

> In the case of the tree matching we're relying on there being a <TAB>
> after the SHA (but a space between the modes and type), then in some
> of the other tests here that an abbreviated SHA is at the start of the
> line, etc.

Sure, but these being tests, I am not sure we should be assuming the
correct input to these transformations.

>  test_expect_success 'ls-tree --abbrev=5' '
>  	git ls-tree --abbrev=5 $tree >current &&
> -	sed -e "s/ $_x05[0-9a-f]*	/ X	/" <current >check &&
> +	sed -e "s/ [0-9a-f]*	/ X	/" <current >check &&
>  	cat >expected <<\EOF &&
>  100644 blob X	1.txt
>  100644 blob X	2.txt

This one is particularly iffy.  The --abbrev=5 test is designed to
ensure that the resulting abbreviated object names are at least 5
hexdigits long, even when the repository is so small that only 4
hexdigits are sufficient to avoid ambiguity, while allowing the
output to be longer than specified 5 (when 5 turns out to be
insufficient for disambiguation).

So, I dunno.




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