/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/


#include <QtCore/QCoreApplication>
#include <QtTest/QtTest>

#include <private/cycle_p.h>

class tst_BenchlibTickCounter: public QObject
{
    Q_OBJECT

private slots:
    void threeBillionTicks();
};

void tst_BenchlibTickCounter::threeBillionTicks()
{
#ifndef HAVE_TICK_COUNTER
    QSKIP("Tick counter not available on this platform");
#else
    QBENCHMARK {
        CycleCounterTicks start = getticks();
        double el = 0.;
        double max = el;
        while (el < 3000000000.) {
            /* Verify that elapsed time never decreases */
            QVERIFY2(el >= max, qPrintable(
                QString("Tick counter is not monotonic\nElapsed moved from %1 to %2")
                    .arg(max).arg(el)
            ));
            max = el;
            el = elapsed(getticks(), start);
        }
    }
#endif
}

QTEST_MAIN(tst_BenchlibTickCounter)

#include "tst_benchlibtickcounter.moc"