Re: [PATCH v2 12/12] t0612: add tests to exercise Git/JGit reftable compatibility

> While the reftable format is a recent introduction in Git, JGit already
> knows to read and write reftables since 2017. Given the complexity of
> the format there is a very real risk of incompatibilities between those
> two implementations, which is something that we really want to avoid.
> 
> Add some basic tests that verify that reftables written by Git and JGit
> can be read by the respective other implementation. For now this test
> suite is rather small, only covering basic functionality. But it serves
> as a good starting point and can be extended over time.
> 
> Signed-off-by: Patrick Steinhardt <ps@pks.im>
> ---
>  t/t0612-reftable-jgit-compatibility.sh | 132 +++++++++++++++++++++++++
>  1 file changed, 132 insertions(+)
>  create mode 100755 t/t0612-reftable-jgit-compatibility.sh
> 
> diff --git a/t/t0612-reftable-jgit-compatibility.sh b/t/t0612-reftable-jgit-compatibility.sh
> new file mode 100755
> index 0000000000..222464e360
> --- /dev/null
> +++ b/t/t0612-reftable-jgit-compatibility.sh
> @@ -0,0 +1,132 @@
> +#!/bin/sh
> +
> +test_description='reftables are compatible with JGit'
> +
> +GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
> +export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
> +GIT_TEST_DEFAULT_REF_FORMAT=reftable
> +export GIT_TEST_DEFAULT_REF_FORMAT
> +
> +# JGit does not support the 'link' DIRC extension.
> +GIT_TEST_SPLIT_INDEX=0
> +export GIT_TEST_SPLIT_INDEX
> +
> +. ./test-lib.sh
> +
> +if ! test_have_prereq JGIT