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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QString>
#include <QtCore/QTime>
#include <QtCore/QElapsedTimer>
#include <QtTest/QtTest>
static const int minResolution = 50; // the minimum resolution for the tests
QDebug operator<<(QDebug s, const QElapsedTimer &t)
{
union {
QElapsedTimer t;
struct { qint64 t1, t2; } i;
} copy;
copy.t = t;
s.nospace() << "(" << copy.i.t1 << ", " << copy.i.t2 << ")";
return s.space();
}
class tst_QElapsedTimer : public QObject
{
Q_OBJECT
private Q_SLOTS:
void statics();
void validity();
void basics();
void elapsed();
};
void tst_QElapsedTimer::statics()
{
qDebug() << "Clock type is" << QElapsedTimer::clockType();
qDebug() << "Said clock is" << (QElapsedTimer::isMonotonic() ? "monotonic" : "not monotonic");
QElapsedTimer t;
t.start();
qDebug() << "Current time is" << t.msecsSinceReference();
}
void tst_QElapsedTimer::validity()
{
QElapsedTimer t;
t.invalidate();
QVERIFY(!t.isValid());
t.start();
QVERIFY(t.isValid());
t.invalidate();
QVERIFY(!t.isValid());
}
void tst_QElapsedTimer::basics()
{
QElapsedTimer t1;
t1.start();
QVERIFY(t1.msecsSinceReference() != 0);
QCOMPARE(t1, t1);
QVERIFY(!(t1 != t1));
QVERIFY(!(t1 < t1));
QCOMPARE(t1.msecsTo(t1), qint64(0));
QCOMPARE(t1.secsTo(t1), qint64(0));
// QCOMPARE(t1 + 0, t1);
// QCOMPARE(t1 - 0, t1);
#if 0
QElapsedTimer t2 = t1;
t2 += 1000; // so we can use secsTo
QVERIFY(t1 != t2);
QVERIFY(!(t1 == t2));
QVERIFY(t1 < t2);
QVERIFY(!(t2 < t1));
QCOMPARE(t1.msecsTo(t2), qint64(1000));
QCOMPARE(t1.secsTo(t2), qint64(1));
// QCOMPARE(t2 - t1, qint64(1000));
// QCOMPARE(t1 - t2, qint64(-1000));
#endif
quint64 value1 = t1.msecsSinceReference();
qDebug() << value1 << t1;
qint64 nsecs = t1.nsecsElapsed();
qint64 elapsed = t1.restart();
QVERIFY(elapsed < minResolution);
QVERIFY(nsecs / 1000000 < minResolution);
quint64 value2 = t1.msecsSinceReference();
qDebug() << value2 << t1 << elapsed << nsecs;
// in theory, elapsed == value2 - value1
// However, since QElapsedTimer keeps internally the full resolution,
// we have here a rounding error due to integer division
QVERIFY(qAbs(elapsed - qint64(value2 - value1)) <= 1);
}
void tst_QElapsedTimer::elapsed()
{
QElapsedTimer t1;
t1.start();
QTest::qSleep(4*minResolution);
QElapsedTimer t2;
t2.start();
QVERIFY(t1 != t2);
QVERIFY(!(t1 == t2));
QVERIFY(t1 < t2);
QVERIFY(t1.msecsTo(t2) > 0);
// don't check: t1.secsTo(t2)
// QVERIFY(t1 - t2 < 0);
QVERIFY(t1.nsecsElapsed() > 0);
QVERIFY(t1.elapsed() > 0);
// the number of elapsed nanoseconds and milliseconds should match
QVERIFY(t1.nsecsElapsed() - t1.elapsed() * 1000000 < 1000000);
QVERIFY(t1.hasExpired(minResolution));
QVERIFY(!t1.hasExpired(8*minResolution));
QVERIFY(!t2.hasExpired(minResolution));
QVERIFY(!t1.hasExpired(-1));
QVERIFY(!t2.hasExpired(-1));
qint64 elapsed = t1.restart();
QVERIFY(elapsed > 3*minResolution);
QVERIFY(elapsed < 5*minResolution);
qint64 diff = t2.msecsTo(t1);
QVERIFY(diff < minResolution);
}
QTEST_MAIN(tst_QElapsedTimer);
#include "tst_qelapsedtimer.moc"
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