# Test::Simple or Test::More
ok($var eq 'a' || $var eq 'b', "test name");

##</code><code>##

# Test::Simple or Test::More
ok((map { $_ eq 'a' || $_ eq 'b' } $var), "test name");

##</code><code>##

# Test::More
like($var, qr/^(?:a|b)\z/, "test name");