Re: [PATCH v4 01/21] fsck tests: refactor one test to use a sub-repo

> Refactor one of the fsck tests to use a throwaway repository. It's a
> pervasive pattern in t1450-fsck.sh to spend a lot of effort on the
> teardown of a tests so we're not leaving corrupt content for the next
> test.
> 
> We should instead simply use something like this test_create_repo
> pattern. It's both less verbose, and makes things easier to debug as a
> failing test can have their state left behind under -d without
> damaging the state for other tests.
> 
> But let's punt on that general refactoring and just change this one
> test, I'm going to change it further in subsequent commits.
> 
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
>   t/t1450-fsck.sh | 34 ++++++++++++++++------------------
>   1 file changed, 16 insertions(+), 18 deletions(-)
> 
> diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
> index 5071ac63a5b..1563b35f88c 100755
> --- a/t/t1450-fsck.sh
> +++ b/t/t1450-fsck.sh
> @@ -48,24 +48,22 @@ remove_object () {
>   	rm "$(sha1_file "$1")"
>   }
>   
> -test_expect_success 'object with bad sha1' '
> -	sha=$(echo blob | git hash-object -w --stdin) &&
> -	old=$(test_oid_to_path "$sha") &&
> -	new=$(dirname $old)/$(test_oid ff_2) &&
> -	sha="$(dirname $new)$(basename $new)" &&
> -	mv .git/objects/$old .git/objects/$new &&
> -	test_when_finished "remove_object $sha" &&
> -	git update-index --add --cacheinfo 100644 $sha foo &&
> -	test_when_finished "git read-tree -u --reset HEAD" &&
> -	tree=$(git write-tree) &&
> -	test_when_finished "remove_object $tree" &&
> -	cmt=$(echo bogus | git commit-tree $tree) &&
> -	test_when_finished "remove_object $cmt" &&
> -	git update-ref refs/heads/bogus $cmt &&
> -	test_when_finished "git update-ref -d refs/heads/bogus" &&
> -
> -	test_must_fail git fsck 2>out &&
> -	test_i18ngrep "$sha.*corrupt" out
> +test_expect_success 'object with hash mismatch' '
> +	test_create_repo hash-mismatch &&

> +	(
> +		cd hash-mismatch &&
> +		oid=$(echo blob | git hash-object -w --stdin) &&
> +		old=$(test_oid_to_path "$oid") &&
> +		new=$(dirname $old)/$(test_oid ff_2) &&
> +		oid="$(dirname $new)$(basename $new)" &&
> +		mv .git/objects/$old .git/objects/$new &&
> +		git update-index --add --cacheinfo 100644 $oid foo &&
> +		tree=$(git write-tree) &&
> +		cmt=$(echo bogus | git commit-tree $tree) &&
> +		git update-ref refs/heads/bogus $cmt &&
> +		test_must_fail git fsck 2>out &&
> +		test_i18ngrep "$oid.*corrupt" out
> +	)
>   '
>   
>   test_expect_success 'branch pointing to non-commit' '
>