Re: [PATCH v3 7/8] tests: don't lose "git" exit codes in "! ( git ... | grep )"

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Am 02.12.22 um 12:52 schrieb Ævar Arnfjörð Bjarmason:
> Change tests that would lose the "git" exit code via a negation
> pattern to:
>
> - In the case of "t0055-beyond-symlinks.sh" compare against the
>   expected output instead.
>
> - For "t3700-add.sh" use "sed -n" to print the expected "bad" part,
>   and use "test_must_be_empty" to assert that it's not there.
>
>   We can also remove a repeated invocation of "git ls-files" for the
>   last test that's being modified in that file, and search the
>   existing "files" output instead.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
> ---
>  t/t0055-beyond-symlinks.sh | 14 ++++++++++++--
>  t/t3700-add.sh             | 18 +++++++++++++-----
>  2 files changed, 25 insertions(+), 7 deletions(-)
>
> diff --git a/t/t0055-beyond-symlinks.sh b/t/t0055-beyond-symlinks.sh
> index 6bada370225..c3eb1158ef9 100755
> --- a/t/t0055-beyond-symlinks.sh
> +++ b/t/t0055-beyond-symlinks.sh
> @@ -15,12 +15,22 @@ test_expect_success SYMLINKS setup '
>
>  test_expect_success SYMLINKS 'update-index --add beyond symlinks' '
>  	test_must_fail git update-index --add c/d &&
> -	! ( git ls-files | grep c/d )
> +	cat >expect <<-\EOF &&
> +	a
> +	b/d
> +	EOF
> +	git ls-files >actual &&
> +	test_cmp expect actual
>  '

Hmm, this makes the test depend on the other files.  Adding more of them
for a different test now requires updating this test as well.  Why not
handle it like you did in t3700 below?

>
>  test_expect_success SYMLINKS 'add beyond symlinks' '
>  	test_must_fail git add c/d &&
> -	! ( git ls-files | grep c/d )
> +	cat >expect <<-\EOF &&
> +	a
> +	b/d
> +	EOF
> +	git ls-files >actual &&
> +	test_cmp expect actual
>  '

Same here.

>
>  test_done
> diff --git a/t/t3700-add.sh b/t/t3700-add.sh
> index 51afbd7b24a..82dd768944f 100755
> --- a/t/t3700-add.sh
> +++ b/t/t3700-add.sh
> @@ -106,24 +106,32 @@ test_expect_success '.gitignore test setup' '
>
>  test_expect_success '.gitignore is honored' '
>  	git add . &&
> -	! (git ls-files | grep "\\.ig")
> +	git ls-files >files &&
> +	sed -n "/\\.ig/p" <files >actual &&
> +	test_must_be_empty actual
>  '

You use sed instead of grep because no match is expected and sed returns
0 even then, while grep would exit with code 1, correct?  OK.

Can we use that, though?  I.e. how about this?

	git ls-files >files &&
	test_expect_code 1 grep "\\.ig" files

It would print the unexpected lines in verbose mode like this:

	expecting success of 3700.12 '.gitignore is honored':
		git add . &&
		git ls-files >files &&
		echo foo.ig >files &&	# inject bogus value
		test_expect_code 1 grep "\\.ig" files

	foo.ig
	test_expect_code: command exited with 0, we wanted 1 grep \.ig files

Or can we trust ls-files' own filtering?

	git ls-files "*.ig" >actual &&
	test_must_be_empty actual

Both variants are shorter and should be slightly faster, which can
matter if we use that pattern more widely.

(Didn't measure here, but from a recent foray into t3920 on Windows I
took home that removing commands has a small, but measurable impact there:
https://lore.kernel.org/git/203cb627-2423-8a35-d280-9f9ffc66e072@xxxxxx/T/#u)

>
>  test_expect_success 'error out when attempting to add ignored ones without -f' '
>  	test_must_fail git add a.?? &&
> -	! (git ls-files | grep "\\.ig")
> +	git ls-files >files &&
> +	sed -n "/\\.ig/p" <files >actual &&
> +	test_must_be_empty actual
>  '
>
>  test_expect_success 'error out when attempting to add ignored ones without -f' '
>  	test_must_fail git add d.?? &&
> -	! (git ls-files | grep "\\.ig")
> +	git ls-files >files &&
> +	sed -n "/\\.ig/p" <files >actual &&
> +	test_must_be_empty actual
>  '
>
>  test_expect_success 'error out when attempting to add ignored ones but add others' '
>  	touch a.if &&
>  	test_must_fail git add a.?? &&
> -	! (git ls-files | grep "\\.ig") &&
> -	(git ls-files | grep a.if)
> +	git ls-files >files &&
> +	sed -n "/\\.ig/p" <files >actual &&
> +	test_must_be_empty actual &&
> +	grep a.if files
>  '
>
>  test_expect_success 'add ignored ones with -f' '




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