Re: [PATCH 2/6] t3404-rebase-interactive: mark a test with REFFILES prereq

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

On Fri, Sep 30 2022, SZEDER Gábor wrote:

> The test '--update-refs: check failed ref update' added in b3b1a21d1a
> (sequencer: rewrite update-refs as user edits todo list, 2022-07-19)
> directly modifies the contents of a ref file, so mark this test with
> the REFFILES prereq.
>
> Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
> ---
>  t/t3404-rebase-interactive.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
> index 688b01e3eb..7f0df58628 100755
> --- a/t/t3404-rebase-interactive.sh
> +++ b/t/t3404-rebase-interactive.sh
> @@ -1964,7 +1964,7 @@ test_expect_success 'respect user edits to update-ref steps' '
>  	test_cmp_rev HEAD refs/heads/no-conflict-branch
>  '
>  
> -test_expect_success '--update-refs: check failed ref update' '
> +test_expect_success REFFILES '--update-refs: check failed ref update' '
>  	git checkout -B update-refs-error no-conflict-branch &&
>  	git branch -f base HEAD~4 &&
>  	git branch -f first HEAD~3 &&

We had various tests that depended on .git/refs/* for a good reason, and
some that didn't.

I may be missing something, but in this case this seems to be a "no good
reason" case. I.e. the fix seems to just be:

diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 688b01e3eb6..f1c021a7f7b 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -1994,8 +1994,9 @@ test_expect_success '--update-refs: check failed ref update' '
 	# At this point, the values of first, second, and third are
 	# recorded in the update-refs file. We will force-update the
 	# "second" ref, but "git branch -f" will not work because of
-	# the lock in the update-refs file.
-	git rev-parse third >.git/refs/heads/second &&
+	# the lock in the update-refs file, so we need to use
+	# "update-ref".
+	git update-ref refs/heads/second third &&
 
 	test_must_fail git rebase --continue 2>err &&
 	grep "update_ref failed for ref '\''refs/heads/second'\''" err &&

As the comment notes if you try that with "git branch" you'll get an
error, even with --force, but update-ref works just fine...