[227440] Stateful bot test

sclass Bot {
  event change; // not even needed (bot is saved after every answer), but doesn't hurt
  S userName;

  S answer(S s) {
    new Matches m;
    if "My name is ..." {
      userName = $1;
      change(); // not needed (see above)
      ret "OK, stored.";
    }
      
    if "Hi"
      ret "Hello " + or2(userName, "stranger");
    null;
  }
}

sO calc() { ret new Bot; }