Re: [PATCH v3 0/3] Improve robustness of putty detection

> "brian m. carlson" <sandals@crustytoothpaste.net> writes:
> 
>> While I was adding tests, I noticed that we had a broken test due to the
>> use of single quotes within a test, which resulted in the test always
>> being skipped.
> 
> Good eyes.  While fixing the test is necessary, we should also be
> able to improve the test framework to prevent such mistakes at the
> same time.
> 
> ok 38 # skip
>         git clone "[myhost:123]:src" ssh-bracket-clone &&
>         expect_ssh myhost -p (missing bracketed hostnames are still
>         ssh)
> 
> The test scripts are expected to take either 3 or 4 parameters, and
> the extra parameter when it takes 4 is the comma separated list of
> prerequisites.  "bracketed hostnames are still ssh" does not look
> like prerequisites at all to us humans, and the framework should
> also be able to notice that and barf, I would think.
> 
> Perhaps something like this?
> 
>  t/test-lib-functions.sh | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
> index 0698ce7..0e4f2a6 100644
> --- a/t/test-lib-functions.sh
> +++ b/t/test-lib-functions.sh
> @@ -348,11 +348,18 @@ test_declared_prereq () {
>  	return 1
>  }
>  
> +test_verify_prereq () {
> +	test -z "$test_prereq" ||
> +	expr >/dev/null "$test_prereq" : '^[A-Z0-9_,!]*$' ||
> +	error "bug in the test script: '$test_prereq' does not look like a prereq"
> +}
> +
>  test_expect_failure () {
>  	test_start_
>  	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
>  	test "$#" = 2 ||
>  	error "bug in the test script: not 2 or 3 parameters to test-expect-failure"
> +	test_verify_prereq
>  	export test_prereq
>  	if ! test_skip "$@"
>  	then
> @@ -372,6 +379,7 @@ test_expect_success () {
>  	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
>  	test "$#" = 2 ||
>  	error "bug in the test script: not 2 or 3 parameters to test-expect-success"
> +	test_verify_prereq
>  	export test_prereq
>  	if ! test_skip "$@"
>  	then
> @@ -400,6 +408,7 @@ test_external () {
>  	error >&5 "bug in the test script: not 3 or 4 parameters to test_external"
>  	descr="$1"
>  	shift
> +	test_verify_prereq
>  	export test_prereq
>  	if ! test_skip "$descr" "$@"
>  	then
>