use IO::Interactive qw( interactive );
print "1..2\n";
if (-t *STDIN && -t *STDOUT ) {
print {interactive} "ok 1\n";
print {interactive(*STDOUT)} "ok 2\n";
}
else {
print {interactive} "not ";
print "ok 1\n";
print {interactive(*STDOUT)} "not ";
print "ok 2\n";
}