qt5base-lts/tests/auto/qmath/tst_qmath.cpp

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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:
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**
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** conditions contained in a signed written agreement between you and Nokia.
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** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
#include <qmath.h>
static const qreal PI = 3.14159265358979323846264338327950288;
class tst_QMath : public QObject
{
Q_OBJECT
private slots:
void fastSinCos();
};
void tst_QMath::fastSinCos()
{
// Test evenly spaced angles from 0 to 2pi radians.
const int LOOP_COUNT = 100000;
for (int i = 0; i < LOOP_COUNT; ++i) {
qreal angle = i * 2 * PI / (LOOP_COUNT - 1);
QVERIFY(qAbs(qSin(angle) - qFastSin(angle)) < 1e-5);
QVERIFY(qAbs(qCos(angle) - qFastCos(angle)) < 1e-5);
}
}
QTEST_APPLESS_MAIN(tst_QMath)
#include "tst_qmath.moc"