scoped_qcoreapplication.h

// SPDX-FileCopyrightText: © 2025-2026 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include <cassert>
#include <chrono>
#include <functional>
#include <memory>
 
#include <QCoreApplication>
#include <QElapsedTimer>
 
namespace zrythm::test_helpers
{
class ScopedQCoreApplication
{
public:
  ScopedQCoreApplication ()
  {
    int     argc = 0;
    char ** argv = nullptr;
    app_ = std::make_unique<QCoreApplication> (argc, argv);
  }

  static void process_events_until_true (
    const std::function<bool ()> &cond,
    unsigned int                  max_calls = 100)
  {
    for (unsigned int i = 0; i < max_calls && !cond (); ++i)
      {
        QCoreApplication::processEvents (QEventLoop::AllEvents, 50);
      }
    if (!cond ())
      {
        throw std::runtime_error (
          "process_events_until_true: condition failed after timeout");
      }
  }
 
  static void process_events_until_timeout (
    std::chrono::milliseconds time = std::chrono::milliseconds (200))
  {
    QElapsedTimer timer;
    timer.start ();
    while (timer.durationElapsed () < time)
      {
        QCoreApplication::processEvents (QEventLoop::AllEvents, 50);
      }
  }
 
private:
  std::unique_ptr<QCoreApplication> app_;
};
}