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.
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** No Commercial Usage
** This file contains pre-release code and may not be distributed.
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** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
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** 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
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****************************************************************************/
#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"