Subject: Re: [PATCH v2 2/3] test-lib-functions.sh: add a test_with_columns function

From: SZEDER Gábor <[email-masked]>
Date: Mon, 2 Aug 2021 19:14:29 +0200

On Mon, Aug 02, 2021 at 03:46:27PM +0200, Ævar Arnfjörð Bjarmason wrote:
> Add a helper function to wrap patterns of "COLUMNS=N <command>" as
> "test_with_columns N <command>". This will be used and extended in the
> next commit.

> diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
> index 37da7d9a99a..536339faaa2 100644
> --- a/t/test-lib-functions.sh
> +++ b/t/test-lib-functions.sh
> @@ -1718,3 +1718,11 @@ test_region () {
>  test_readlink () {
>  	perl -le 'print readlink($_) for @ARGV' "$@"
>  }
> +
> +# Test a with a given number of COLUMNS in the environment.
> +test_with_columns () {
> +	local columns=$1
> +	shift
> +
> +	COLUMNS=$columns "$@"
> +}

This function needs some redirections to separate the tested command's
standard error from the function's '-x' trace, see a5bf824f3b (t:
prevent '-x' tracing from interfering with test helpers' stderr,
2018-02-25).