Re: [PATCH] tests: Introduce test_seq

> Tentatively I'll queue this one on top, but I am tempted to squash
> this in before merging the topic down.
> 
> -- >8 --
> Subject: [PATCH] fixup! tests: Introduce test_seq
> 
> Complex chains of && and || are harder to read when used as
> replacement for if/else statements, but it is easy to rewrite it
> with a case/esac in this case.

> 
> Avoid using unnecessary variables $first and $last.
> 
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> ---
>  t/test-lib-functions.sh | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
> index c8b4ae3..7dc70eb 100644
> --- a/t/test-lib-functions.sh
> +++ b/t/test-lib-functions.sh
> @@ -532,7 +532,7 @@ test_cmp() {
>  
>  # Print a sequence of numbers or letters in increasing order.  This is
>  # similar to GNU seq(1), but the latter might not be available
> -# everywhere.  It may be used like:
> +# everywhere (and does not do letters).  It may be used like:
>  #
>  #	for i in `test_seq 100`; do
>  #		for j in `test_seq 10 20`; do
> @@ -543,11 +543,12 @@ test_cmp() {
>  #	done
>  
>  test_seq () {
> -	test $# = 2 && { first=$1; shift; } || first=1
> -	test $# = 1 ||
> -	error "bug in the test script: not 1 or 2 parameters to test_seq"
> -	last=$1
> -	"$PERL_PATH" -le 'print for "$ARGV[0]".."$ARGV[1]"' "$first" "$last"
> +	case $# in
> +	1)	set 1 "$@" ;;
> +	2)	;;
> +	*)	error "bug in the test script: not 1 or 2 parameters to test_seq" ;;
> +	esac
> +	"$PERL_PATH" -le 'print for $ARGV[0]..$ARGV[1]' "$@"
>  }
>  
>  # This function can be used to schedule some commands to be run