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/***************************************************************************
 *   Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company *
 *                      <info@kdab.com>                                    *
 *   Author: Andras Mantia <andras.mantia@kdab.com>                        *
 *           Work sponsored by the LiMux project of the city of Munich.    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA .        *
 ***************************************************************************/

#include "screenmappertest.h"
#include "screenmapper.h"

#include <QTest>
#include <QSignalSpy>

QTEST_MAIN(ScreenMapperTest)

void ScreenMapperTest::initTestCase()
{
    m_screenMapper = ScreenMapper::instance();
}

void ScreenMapperTest::init()
{
    m_screenMapper->cleanup();
}

void ScreenMapperTest::tst_addScreens()
{
    const auto path = QStringLiteral("desktop:/");
    QSignalSpy s(m_screenMapper, &ScreenMapper::screensChanged);
    m_screenMapper->addScreen(-1, path);
    QCOMPARE(s.count(), 0);
    m_screenMapper->addScreen(1, path);
    QCOMPARE(s.count(), 1);
    m_screenMapper->addScreen(0, path);
    QCOMPARE(s.count(), 2);
    m_screenMapper->addScreen(1, path);
    QCOMPARE(s.count(), 2);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 0);
}

void ScreenMapperTest::tst_removeScreens()
{
    const auto path = QStringLiteral("desktop:/");
    addScreens(path);
    QSignalSpy s(m_screenMapper, &ScreenMapper::screensChanged);
    m_screenMapper->removeScreen(-1, path);
    QCOMPARE(s.count(), 0);
    m_screenMapper->removeScreen(1, path);
    QCOMPARE(s.count(), 1);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 0);
    m_screenMapper->removeScreen(1, path);
    QCOMPARE(s.count(), 1);
    m_screenMapper->addScreen(3, path);
    QCOMPARE(s.count(), 2);
    m_screenMapper->removeScreen(0, path);
    QCOMPARE(s.count(), 3);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 2);
}

void ScreenMapperTest::tst_addMapping()
{
    const auto path = QStringLiteral("desktop:/");
    addScreens(path);
    QSignalSpy s(m_screenMapper, &ScreenMapper::screenMappingChanged);
    QString file("desktop:/foo%1.txt");

    for (int i = 0 ; i < 3; i++) {
        const QString name = file.arg(i);
        m_screenMapper->addMapping(name, i);
        QCOMPARE(s.count(), i + 1);
        QCOMPARE(m_screenMapper->screenForItem(name), i);
    }
}

void ScreenMapperTest::tst_addRemoveScreenWithItems()
{
    const auto path = QStringLiteral("desktop:/");
    addScreens(path);
    QString file("desktop:/foo%1.txt");

    for (int i = 0 ; i < 3; i++) {
        const QString name = file.arg(i);
        m_screenMapper->addMapping(name, i);
    }

    // remove one screen
    m_screenMapper->removeScreen(1, path);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(0)), 0);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(1)), -1);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(2)), 2);

    // add removed screen back, items screen is restored
    m_screenMapper->addScreen(1, path);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(0)), 0);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(1)), 1);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(2)), 2);

    // remove all screens, firstAvailableScreen changes
    m_screenMapper->removeScreen(0, path);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 1);
    m_screenMapper->removeScreen(1, path);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 2);
    m_screenMapper->removeScreen(2, path);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), -1);


    QCOMPARE(m_screenMapper->screenForItem(file.arg(0)), -1);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(1)), -1);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(2)), -1);

    // add all screens back, all item's screen is restored
    addScreens(path);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(0)), 0);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(1)), 1);
    QCOMPARE(m_screenMapper->screenForItem(file.arg(2)), 2);

    // remove one screen and move its item
    const QString movedItem = file.arg(1);
    m_screenMapper->removeScreen(1, path);
    QCOMPARE(m_screenMapper->screenForItem(movedItem), -1);
    m_screenMapper->addMapping(movedItem, 0);
    QCOMPARE(m_screenMapper->screenForItem(movedItem), 0);

    // add back the screen, item goes back to the original place
    m_screenMapper->addScreen(1, path);
    QCOMPARE(m_screenMapper->screenForItem(movedItem), 1);
}

void ScreenMapperTest::tst_addRemoveScreenDifferentPaths()
{
    const auto path = QStringLiteral("desktop:/Foo");
    const auto path2 = QStringLiteral("desktop:/Foo2");
    m_screenMapper->addScreen(0, path);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path), 0);
    QCOMPARE(m_screenMapper->firstAvailableScreen(path2), -1);

}

void ScreenMapperTest::addScreens(const QString &path)
{
    m_screenMapper->addScreen(0, path);
    m_screenMapper->addScreen(1, path);
    m_screenMapper->addScreen(2, path);
}