Method DoWork

test/async_worker_persistent.cc:14–24

 public:
  static PersistentTestWorker* current_worker;
  static void DoWork(const CallbackInfo& info) {
    bool succeed = info[0].As<Boolean>();
    Function cb = info[1].As<Function>();

    PersistentTestWorker* worker = new PersistentTestWorker(cb, "TestResource");
    current_worker = worker;

    worker->SuppressDestruct();
    worker->_succeed = succeed;
    worker->Queue();
  }

  static Value GetWorkerGone(const CallbackInfo& info) {
    return Boolean::New(info.Env(), current_worker == nullptr);