Re: [PATCH GSoC v3 1/8] t5701: use test_file_size() to get the size of a file

[Junio C Hamano <gitster@pobox.com>]

Pablo Sabater <pabloosabaterr@gmail.com> writes:

> The 'basics of object-info' test runs 'wc -c | xargs' twice to get the
> size of two.t. The pipe to xargs is only there to strip the blanks
> that some platforms pad the output of wc with.
>
> Use the test_file_size() helper, which outputs the size directly, and
> store the result in a variable. Because 'git rev-parse two:two.t' is
> also run twice, store its output in a variable as well.

It also has the benefit of retaining the exit status from commands
run inside a $( ... ) construct placed within a HERE-document.
Earlier, if your "git rev-parse" failed, you would not have noticed
it directly (though you would probably have seen the "expect" file
containing unexpected content).  Now your assignment fails when you
compute two_oid, if your "git rev-parse" segfaults.

> Mentored-by: Karthik Nayak <karthik.188@gmail.com>
> Mentored-by: Chandra Pratap <chandrapratap3519@gmail.com>
> Signed-off-by: Pablo Sabater <pabloosabaterr@gmail.com>
> ---
>  t/t5701-git-serve.sh | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/t/t5701-git-serve.sh b/t/t5701-git-serve.sh
> index 9a575aa098..51d5dd1ae6 100755
> --- a/t/t5701-git-serve.sh
> +++ b/t/t5701-git-serve.sh
> @@ -344,20 +344,23 @@ test_expect_success 'unexpected lines are not allowed in fetch request' '
>  test_expect_success 'basics of object-info' '
>  	test_config transfer.advertiseObjectInfo true &&
>  
> +	two_oid=$(git rev-parse two:two.t) &&
> +	two_size=$(test_file_size two.t) &&
> +
>  	test-tool pkt-line pack >in <<-EOF &&
>  	command=object-info
>  	object-format=$(test_oid algo)
>  	0001
>  	size
> -	oid $(git rev-parse two:two.t)
> -	oid $(git rev-parse two:two.t)
> +	oid $two_oid
> +	oid $two_oid
>  	0000
>  	EOF
>  
>  	cat >expect <<-EOF &&
>  	size
> -	$(git rev-parse two:two.t) $(wc -c <two.t | xargs)
> -	$(git rev-parse two:two.t) $(wc -c <two.t | xargs)
> +	$two_oid $two_size
> +	$two_oid $two_size
>  	0000
>  	EOF