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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QTESTEVENTLOOP_H
#define QTESTEVENTLOOP_H
#include <QtTest/qttestglobal.h>
#include <QtTest/qtestcase.h>
#include <QtCore/qcoreapplication.h>
#include <QtCore/qeventloop.h>
#include <QtCore/qobject.h>
#include <QtCore/qpointer.h>
#include <QtCore/qthread.h>
QT_BEGIN_NAMESPACE
class Q_TESTLIB_EXPORT QTestEventLoop : public QObject
{
Q_OBJECT
public:
QTestEventLoop(QObject *parent = nullptr)
: QObject(parent), _timeout(false)
{}
void enterLoopMSecs(int ms) { enterLoop(std::chrono::milliseconds{ms}); };
void enterLoop(int secs) { enterLoop(std::chrono::seconds{secs}); }
inline void enterLoop(std::chrono::milliseconds msecs);
inline void changeInterval(int secs)
{ killTimer(timerId); timerId = startTimer(secs * 1000); }
inline bool timeout() const
{ return _timeout; }
inline static QTestEventLoop &instance()
{
Q_CONSTINIT static QPointer<QTestEventLoop> testLoop;
if (testLoop.isNull())
testLoop = new QTestEventLoop(QCoreApplication::instance());
return *static_cast<QTestEventLoop *>(testLoop);
}
public Q_SLOTS:
inline void exitLoop();
protected:
inline void timerEvent(QTimerEvent *e) override;
private:
QEventLoop *loop = nullptr;
int timerId = -1;
uint _timeout :1;
Q_DECL_UNUSED_MEMBER uint reserved :31;
};
inline void QTestEventLoop::enterLoop(std::chrono::milliseconds msecs)
{
Q_ASSERT(!loop);
_timeout = false;
if (QTest::runningTest() && QTest::currentTestResolved())
return;
using namespace std::chrono_literals;
QEventLoop l;
// if tests want to measure sub-second precision, use a precise timer
timerId = startTimer(msecs, msecs < 1s ? Qt::PreciseTimer : Qt::CoarseTimer);
loop = &l;
l.exec();
loop = nullptr;
}
inline void QTestEventLoop::exitLoop()
{
if (thread() != QThread::currentThread())
{
QMetaObject::invokeMethod(this, "exitLoop", Qt::QueuedConnection);
return;
}
if (timerId != -1)
killTimer(timerId);
timerId = -1;
if (loop)
loop->exit();
}
inline void QTestEventLoop::timerEvent(QTimerEvent *e)
{
if (e->timerId() != timerId)
return;
_timeout = true;
exitLoop();
}
QT_END_NAMESPACE
#endif
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