svoid test_MD5() {
  var data = utf8("");
  printStruct(+data);
  S s = md5(data);
  var bytes = md5AsByteArray(data);
  printStruct(+bytes);
  //print(asList(parseHexBytes(s));
  var md5 = new MD5(data);
  printVars(a := md5.a, b := md5.b, max := Long.MAX_VALUE, a := longToHex(md5.a), a := asList(longToBytes(md5.a)));
  printVars(a1 := intFromBytes_bigEndian(bytes, 0), a2 := intFromBytes_bigEndian(bytes, 4));
  printVars(aShouldBe := longFromBytes_bigEndian(bytes, 0));
  assertEqualsVerbose("MD5=" + s, str(md5));
}