m4: Convert tests to ATF

[des]

Summary

MFC after: 1 week
Sponsored by: Klara, Inc.

[obiwac]

kind of dirty, but ig you could have another function for generating these testcases using eval:

define_test()
{
	name=$1
	shift
	args=$*

	eval "
${name}_head()
{
}
${name}_body()
{
	m4_test ${args} ${name}
}
"
}

# [...]

define_test eval
define_test ff_after_dnl
define_test gnueval -g
define_test gnuformat -g

# [...]

usr.bin/m4/tests/m4_test.sh

71

presumably?

[des]

In D55115#1259790, @obiwac wrote:

kind of dirty, but ig you could have another function for generating these testcases using eval:

I did that for sbin/md5 and regretted it.

[des]

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