use Test::More;
use Symbol::Approx::Sub (xform => [ sub { map { s/[^a-z]//ig; $_ } @_ },
sub { map { lc } @_ } ]);
sub a_a { 'aa' }
is(AA(), 'aa', 'AA() calls a_a()');
done_testing;
use Test::More;
use Symbol::Approx::Sub (xform => [ sub { map { s/[^a-z]//ig; $_ } @_ },
sub { map { lc } @_ } ]);
sub a_a { 'aa' }
is(AA(), 'aa', 'AA() calls a_a()');
done_testing;