Re: [PATCH v6 2/2] t5560-http-backend-noserver.sh: add CONTENT_LENGTH cases

[Eric Sunshine <sunshine@sunshineco.com>]

On Sun, Nov 26, 2017 at 2:38 PM, Max Kirillov <max@max630.net> wrote:
> Add tests for cases:
>
> * CONTENT_LENGTH is set, script's stdin has more data.
>   (Failure would make it read GIT_HTTP_MAX_REQUEST_BUFFER bytes from /dev/zero
>   and fail. It does not seem to cause any performance issues with the default
>   value of GIT_HTTP_MAX_REQUEST_BUFFER.)
> * CONTENT_LENGTH is specified to a value which does not fix into ssize_t.
>
> Signed-off-by: Max Kirillov <max@max630.net>
> ---
> diff --git a/t/helper/test-print-values.c b/t/helper/test-print-values.c
> @@ -0,0 +1,10 @@
> +int cmd_main(int argc, const char **argv)
> +{
> +       if (argc == 2 && strcmp(argv[1], "(size_t)(-20)") == 0)
> +               printf("%zu", (ssize_t)(-20));
> +
> +       return 0;

Perhaps this should return 0 only if it gets the expected argument
"(size_t)(-20)", and return an error otherwise.

> +}
> diff --git a/t/t5560-http-backend-noserver.sh b/t/t5560-http-backend-noserver.sh
> @@ -71,4 +71,34 @@ test_expect_success 'http-backend blocks bad PATH_INFO' '
> +test_expect_success 'CONTENT_LENGTH overflow ssite_t' '
> +       NOT_FIT_IN_SSIZE=`"$GIT_BUILD_DIR/t/helper/test-print-values" "(size_t)(-20)"` &&

Rather than introducing a new 'test' program, would it be possible to
get by with just using 'printf' from the shell?

    % printf "%zu\n" -20
    18446744073709551596

> +       env \
> +               CONTENT_TYPE=application/x-git-upload-pack-request \
> +               QUERY_STRING=/repo.git/git-upload-pack \
> +               PATH_TRANSLATED="$PWD"/.git/git-upload-pack \
> +               GIT_HTTP_EXPORT_ALL=TRUE \
> +               REQUEST_METHOD=POST \
> +               CONTENT_LENGTH="$NOT_FIT_IN_SSIZE" \
> +               git http-backend </dev/zero >/dev/null 2>err &&
> +       grep -q "fatal:.*CONTENT_LENGTH" err
> +'