#include <QCoreApplication>
#include <QDebug>
#include <QThread>
#include <QTimer>

class test2 : public QObject {
  Q_OBJECT

public:
  test2(QObject *parent) : QObject(parent) {}

public slots:
  void testslot() { qDebug() << "testslot"; }
};

class test : public QObject {
  Q_OBJECT

public:
  test(test2 *d) : d(d) {}

public slots:
  void start() {
    QTimer *timer = new QTimer(this);
    timer->setInterval(1);
    timer->setSingleShot(false);
    timer->start();

    connect(timer, &QTimer::timeout, d, &test2::testslot,
            Qt::BlockingQueuedConnection);
  }

private:
  test2 *d;
};

int main(int argc, char *argv[]) {
  QCoreApplication a(argc, argv);
  test2 *t2 = new test2(&a);

  QThread *thread = new QThread(&a);
  test *t = new test(t2);
  t->moveToThread(thread);

  QObject::connect(thread, &QThread::started, t, &test::start);
  QObject::connect(thread, &QThread::finished, t, &test::deleteLater);

  thread->start();

  QTimer::singleShot(5000, [thread]() {
    qDebug() << "quit";
    thread->quit();
    while (!thread->isFinished()) {
      qDebug() << "wait";
      thread->wait(1000);
    }
    qDebug() << "app.exit";
    qApp->exit(0);
  });

  return a.exec();
}

#include "main.moc"