print("\n--- Test: base64 module ---");
import base64;

var s = "hello world";
var enc = base64.encode(s);
assert(enc == "aGVsbG8gd29ybGQ=", "base64.encode");
var dec = base64.decode(enc);
assert(dec == s, "base64.decode roundtrip");
print("base64: PASS");