anchor.diff:  import "../../../Utils/expect.dart";
   import "IsolateUtil.dart";
   
  -entryPoint(message){
  +entryPoint(message) {
  +  message.send("Started");
     Random random = new Random();
     int s = 0;
     while (true){
  
positive.code: }
  
  test() async {
    ReceivePort onExit = new ReceivePort();
    Isolate isolate = await Isolate.spawn(
        entryPoint,
        null, // message
        onExit:onExit.sendPort,
        errorsAreFatal:true
    );
    // check
    ReceivePort pingPort = new ReceivePort();
    isolate.ping(pingPort.sendPort, priority:Isolate.beforeNextEvent);
    Future pingResponse = pingPort.first.timeout(TWO_SECONDS, onTimeout: () {
  
negative.code:     return "timeout";
    });
    Expect.equals("timeout", await pingResponse);
  
    isolate.kill(priority:Isolate.immediate);
    await onExit.first;
    asyncEnd();
  