Re: [PATCH v10 13/14] convert: add filter.<driver>.process option

["Torsten Bögershausen" <tboegi@web.de>]

On Tue, Oct 11, 2016 at 10:11:22AM +0200, Lars Schneider wrote:
> 
> > On 10 Oct 2016, at 21:58, Junio C Hamano <gitster@pobox.com> wrote:
> > 
> > larsxschneider@gmail.com writes:
> > 
> > [...]
> >> +# Count unique lines except clean invocations in two files and compare
> >> +# them. Clean invocations are not counted because their number can vary.
> >> +# c.f. http://public-inbox.org/git/xmqqshv18i8i.fsf@gitster.mtv.corp.google.com/
> >> +test_cmp_count_except_clean () {
> >> +	for FILE in $@
> >> +	do
> >> +		sort $FILE | uniq -c | sed "s/^[ ]*//" |
> >> +			sed "s/^\([0-9]\) IN: clean/x IN: clean/" >$FILE.tmp
> >> +		cat $FILE.tmp >$FILE
> >> +	done &&
> >> +	test_cmp $@
> >> +}
> > 
> > Why do you even _care_ about the number of invocations?  While I
> > told you why "clean" could be called multiple times under racy Git
> > as an example, that was not meant to be an exhaustive example.  I
> > wouldn't be surprised if we needed to run smudge twice, for example,
> > in some weirdly racy cases in the future.
> > 
> > Can we just have the correctness (i.e. "we expect that the working
> > tree file gets this as the result of checking it out, and we made
> > sure that is the case") test without getting into such an
> > implementation detail?
> 
> My goal is to check that clean/smudge is invoked at least once. I could
> just run `uniq` to achieve that but then all other filter commands could
> happen multiple times and the test would not detect that.
> 
> I also prefer to check the filter commands to ensure the filter is 
> working as expected (e.g. no multiple start ups etc) in addition to 
> checking the working tree.
> 
> Would the patch below work for you? If yes, then please squash it into
> "convert: add filter.<driver>.process option".
> 
> Thank you,
> Lars
> 
> 
> 
> diff --git a/t/t0021-conversion.sh b/t/t0021-conversion.sh
> index 9f892c0..714f706 100755
> --- a/t/t0021-conversion.sh
> +++ b/t/t0021-conversion.sh
> @@ -31,38 +31,33 @@ filter_git () {
>  	rm -f git-stderr.log
>  }
>  
> -# Count unique lines in two files and compare them.
> -test_cmp_count () {
> -	for FILE in $@
> -	do
> -		sort $FILE | uniq -c | sed "s/^[ ]*//" >$FILE.tmp
> -		cat $FILE.tmp >$FILE
> -	done &&
> -	test_cmp $@
> -}
> -
> -# Count unique lines except clean invocations in two files and compare
> -# them. Clean invocations are not counted because their number can vary.
> +# Compare two files and ensure that `clean` and `smudge` respectively are
> +# called at least once if specified in the `expect` file. The actual
> +# invocation count is not relevant because their number can vary.
>  # c.f. http://public-inbox.org/git/xmqqshv18i8i.fsf@gitster.mtv.corp.google.com/
> -test_cmp_count_except_clean () {
> -	for FILE in $@

> +test_cmp_count () {
> +	expect=$1 actual=$2

That could be 
expect="$1"
actual="$2"

> +	for FILE in "$expect" "$actual"
>  	do

> +		sort "$FILE" | uniq -c | sed "s/^[ ]*//" |
> +			sed "s/^\([0-9]\) IN: clean/x IN: clean/" |
> +			sed "s/^\([0-9]\) IN: smudge/x IN: smudge/" >"$FILE.tmp" &&
> +		cat "$FILE.tmp" >"$FILE"

How about 
		cp "$FILE.tmp" "$FILE"