Re: [PATCH 02/11] multi-pack-index: verify bad header

[Eric Sunshine <sunshine@sunshineco.com>]

On Wed, Sep 5, 2018 at 10:46 AM Derrick Stolee via GitGitGadget
<gitgitgadget@gmail.com> wrote:
> Add tests that check corrupted headers in a few ways:
> [...]
> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
> ---
> diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh
> @@ -154,6 +154,51 @@ test_expect_success 'verify multi-pack-index success' '
> +corrupt_midx_and_verify() {
> +       POS=$1
> +       DATA="${2:-\0}"
> +       OBJDIR=$3
> +       GREPSTR="$4"

If you happen to re-roll, perhaps make these assignments part of the
&&-chain to protect against someone coming along some day an inserting
code before them without realizing that the &&-chain is broken.

> +       FILE=$OBJDIR/pack/multi-pack-index &&
> +       chmod a+w $FILE &&
> +       test_when_finished mv midx-backup $FILE &&
> +       cp $FILE midx-backup &&
> +       printf "$DATA" | dd of="$FILE" bs=1 seek="$POS" conv=notrunc &&
> +       test_must_fail git multi-pack-index verify --object-dir=$OBJDIR 2>test_err &&
> +       grep -v "^+" test_err >err &&
> +       test_i18ngrep "$GREPSTR" err
> +}