qt5base-lts/examples/qtestlib/tutorial5/benchmarking.cpp

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtWidgets>
#include <qtest.h>

class TestBenchmark : public QObject
{
    Q_OBJECT
private slots:
    void simple();
    void multiple_data();
    void multiple();
    void series_data();
    void series();
};

//! [0]
void TestBenchmark::simple()
{
    QString str1 = QLatin1String("This is a test string");
    QString str2 = QLatin1String("This is a test string");

    QCOMPARE(str1.localeAwareCompare(str2), 0);

    QBENCHMARK {
        str1.localeAwareCompare(str2);
    }
}
//! [0]

//! [1]
void TestBenchmark::multiple_data()
{
    QTest::addColumn<bool>("useLocaleCompare");
    QTest::newRow("locale aware compare") << true;
    QTest::newRow("standard compare") << false;
}
//! [1]

//! [2]
void TestBenchmark::multiple()
{
    QFETCH(bool, useLocaleCompare);
    QString str1 = QLatin1String("This is a test string");
    QString str2 = QLatin1String("This is a test string");
    
    int result;
    if (useLocaleCompare) {
        QBENCHMARK {
            result = str1.localeAwareCompare(str2);
        }
    } else {
        QBENCHMARK {
            result = (str1 == str2);
        }
    }
}
//! [2]

//! [3]
void TestBenchmark::series_data()
{
    QTest::addColumn<bool>("useLocaleCompare");
    QTest::addColumn<int>("stringSize");
    
    for (int i = 1; i < 10000; i += 2000) {
        QByteArray size = QByteArray::number(i);
        QTest::newRow(("locale aware compare--" + size).constData()) << true << i;
        QTest::newRow(("standard compare--" + size).constData()) << false << i;
    }
}
//! [4]

//! [5]
void TestBenchmark::series()
{
    QFETCH(bool, useLocaleCompare);
    QFETCH(int, stringSize);

    QString str1 = QString().fill('A', stringSize);
    QString str2 = QString().fill('A', stringSize);
    int result;
    if (useLocaleCompare) {
        QBENCHMARK {
            result = str1.localeAwareCompare(str2);
        }
    } else {
        QBENCHMARK {
            result = (str1 == str2);
        }
    }
}
//! [5]

QTEST_MAIN(TestBenchmark)
#include "benchmarking.moc"