/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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
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** 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
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****************************************************************************/

#include <utils/algorithm.h>

#include <QtTest>

class tst_Algorithm : public QObject
{
    Q_OBJECT

private slots:
    void transform();
};


int stringToInt(const QString &s)
{
    return s.toInt();
}

void tst_Algorithm::transform()
{
    // same container type
    {
        // QList has standard inserter
        const QList<QString> strings({"1", "3", "132"});
        const QList<int> i1 = Utils::transform(strings, [](const QString &s) { return s.toInt(); });
        QCOMPARE(i1, QList<int>({1, 3, 132}));
        const QList<int> i2 = Utils::transform(strings, stringToInt);
        QCOMPARE(i2, QList<int>({1, 3, 132}));
        const QList<int> i3 = Utils::transform(strings, &QString::size);
        QCOMPARE(i3, QList<int>({1, 1, 3}));
    }
    {
        // QStringList
        const QStringList strings({"1", "3", "132"});
        const QList<int> i1 = Utils::transform(strings, [](const QString &s) { return s.toInt(); });
        QCOMPARE(i1, QList<int>({1, 3, 132}));
        const QList<int> i2 = Utils::transform(strings, stringToInt);
        QCOMPARE(i2, QList<int>({1, 3, 132}));
        const QList<int> i3 = Utils::transform(strings, &QString::size);
        QCOMPARE(i3, QList<int>({1, 1, 3}));
    }
    {
        // QSet internally needs special inserter
        const QSet<QString> strings({QString("1"), QString("3"), QString("132")});
        const QSet<int> i1 = Utils::transform(strings, [](const QString &s) { return s.toInt(); });
        QCOMPARE(i1, QSet<int>({1, 3, 132}));
        const QSet<int> i2 = Utils::transform(strings, stringToInt);
        QCOMPARE(i2, QSet<int>({1, 3, 132}));
        const QSet<int> i3 = Utils::transform(strings, &QString::size);
        QCOMPARE(i3, QSet<int>({1, 3}));
    }

    // different container types
    {
        // QList to QSet
        const QList<QString> strings({"1", "3", "132"});
        const QSet<int> i1 = Utils::transform<QSet>(strings, [](const QString &s) { return s.toInt(); });
        QCOMPARE(i1, QSet<int>({1, 3, 132}));
        const QSet<int> i2 = Utils::transform<QSet>(strings, stringToInt);
        QCOMPARE(i2, QSet<int>({1, 3, 132}));
        const QSet<int> i3 = Utils::transform<QSet>(strings, &QString::size);
        QCOMPARE(i3, QSet<int>({1, 3}));
    }
    {
        // QStringList to QSet
        const QStringList strings({"1", "3", "132"});
        const QSet<int> i1 = Utils::transform<QSet>(strings, [](const QString &s) { return s.toInt(); });
        QCOMPARE(i1, QSet<int>({1, 3, 132}));
        const QSet<int> i2 = Utils::transform<QSet>(strings, stringToInt);
        QCOMPARE(i2, QSet<int>({1, 3, 132}));
        const QSet<int> i3 = Utils::transform<QSet>(strings, &QString::size);
        QCOMPARE(i3, QSet<int>({1, 3}));
    }
    {
        // QSet to QList
        const QSet<QString> strings({QString("1"), QString("3"), QString("132")});
        QList<int> i1 = Utils::transform<QList>(strings, [](const QString &s) { return s.toInt(); });
        qSort(i1);
        QCOMPARE(i1, QList<int>({1, 3, 132}));
        QList<int> i2 = Utils::transform<QList>(strings, stringToInt);
        qSort(i2);
        QCOMPARE(i2, QList<int>({1, 3, 132}));
        QList<int> i3 = Utils::transform<QList>(strings, &QString::size);
        qSort(i3);
        QCOMPARE(i3, QList<int>({1, 1, 3}));
    }
}

QTEST_MAIN(tst_Algorithm)

#include "tst_algorithm.moc"