#!inc/bin/testml-cpan
fun = =>
  *a.add(*b) == *c
  *b.add(*a) == *c
  *c.sub(*a) == *b
  *c.sub(*b) == *a
% fun()
=== Test 1
--- a: 111
--- b: 222
--- c: 333
=== Test 2
--- a: 444
--- b: 555
--- c: 999