general {
  funcon-term: sequential (
      check-true(is-equal(length( ), 0))
    , check-true(is-equal(length(1), 1))
    , check-true(is-equal(length(1,2,3), 3))
    , print "OK"
    );
}

tests {
    result-term : null-value;
    standard-out : ["OK"];
}