/*
    This file is part of the Okteta Core library, made within the KDE community.

    Copyright 2008 Friedrich W. H. Kossebau <kossebau@kde.org>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) version 3, or any
    later version accepted by the membership of KDE e.V. (or its
    successor approved by the membership of KDE e.V.), which shall
    act as a proxy defined in Section 6 of version 3 of the license.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/

#include "piecetabletest.hpp"

// test object
#include <piecetable/piecetable.hpp>
// Qt
#include <QTest>

namespace KPieceTable {

// local variables
static constexpr Address Start = 15;
static constexpr Address End = 27;
static constexpr Size HalfBaseSize = 50;
static constexpr Size BaseSize = 2 * HalfBaseSize;

static constexpr Size Width = End - Start + 1;

static constexpr Address ChangeStart = 8;
static constexpr Address ChangeEnd = ChangeStart + Width - 1;

void PieceTableTest::testSimpleConstructor()
{
    PieceTable pieceTable;
    QCOMPARE(pieceTable.size(), 0);
}

void PieceTableTest::testInit()
{
    PieceTable pieceTable;

    pieceTable.init(BaseSize);
    int storageId;
    Address storageOffset;

    bool result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, 0);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize);
    QVERIFY(!result);
}

static void fillWithSize(PieceTable* pieceTable, int count)
{
    pieceTable->init(0);
    for (int i = 0; i < count; ++i) {
        pieceTable->insert(0, BaseSize, BaseSize * i);
    }

}

void PieceTableTest::testInsert()
{
    PieceTable pieceTable;

    int storageId;
    Address storageOffset;
    bool result;

    // inserting to empty
    pieceTable.init(0);
    pieceTable.insert(0, Width, ChangeStart);

    QCOMPARE(pieceTable.size(), Width);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeStart);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeEnd);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width);
    QVERIFY(!result);

    // inserting one at the begin
    pieceTable.init(BaseSize);
    pieceTable.insert(0, Width, ChangeStart);

    QCOMPARE(pieceTable.size(), BaseSize + Width);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeStart);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeEnd);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width);
    QVERIFY(result);
    QCOMPARE(storageOffset, 0);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width);
    QVERIFY(!result);

    // inserting one in the middle
    pieceTable.init(BaseSize);
    pieceTable.insert(Start, Width, ChangeStart);

    QCOMPARE(pieceTable.size(), BaseSize + Width);
    result = pieceTable.getStorageData(&storageId, &storageOffset, Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeStart);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeEnd);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End + 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width);
    QVERIFY(!result);

    // inserting one at the end
    pieceTable.init(BaseSize);
    pieceTable.insert(BaseSize, Width, ChangeStart);

    QCOMPARE(pieceTable.size(), BaseSize + Width);
    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeStart);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, ChangeEnd);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize + Width);
    QVERIFY(!result);

    // inserting a lot:
    // inserting before, after and in another inserted section, two recursions
    // 121110  8 7 6  4 3 2
    // \/\/\/ \/\/\/ \/\/\/
    //  |-9-|  |-5-|  |-1-|
    //  \  /   \  /   \  /
    //   \/     \/     \/
    //    |-----0-------|
    // TODO: do this also in forward sequences
    pieceTable.init(BaseSize);   // 0
    const Address Mid = BaseSize / 2;
    Address changeStarts[13];
    Address changeStart = 0;
    changeStarts[1] = changeStart;
    pieceTable.insert(BaseSize, BaseSize, changeStart);   // 1
    changeStart += BaseSize;
    changeStarts[2] = changeStart;
    pieceTable.insert(BaseSize + BaseSize, BaseSize, changeStart); // 2
    changeStart += BaseSize;
    changeStarts[3] = changeStart;
    pieceTable.insert(BaseSize + Mid, BaseSize, changeStart); // 3
    changeStart += BaseSize;
    changeStarts[4] = changeStart;
    pieceTable.insert(BaseSize, BaseSize, changeStart);   // 4

    changeStart += BaseSize;
    changeStarts[5] = changeStart;
    pieceTable.insert(Mid, BaseSize, changeStart);   // 5
    changeStart += BaseSize;
    changeStarts[6] = changeStart;
    pieceTable.insert(Mid + BaseSize, BaseSize, changeStart); // 6
    changeStart += BaseSize;
    changeStarts[7] = changeStart;
    pieceTable.insert(Mid + Mid, BaseSize, changeStart); // 7
    changeStart += BaseSize;
    changeStarts[8] = changeStart;
    pieceTable.insert(Mid, BaseSize, changeStart);   // 8

    changeStart += BaseSize;
    changeStarts[9] = changeStart;
    pieceTable.insert(0, BaseSize, changeStart);   // 9
    changeStart += BaseSize;
    changeStarts[10] = changeStart;
    pieceTable.insert(BaseSize, BaseSize, changeStart);   // 10
    changeStart += BaseSize;
    changeStarts[11] = changeStart;
    pieceTable.insert(Mid, BaseSize, changeStart);   // 11
    changeStart += BaseSize;
    changeStarts[12] = changeStart;
    pieceTable.insert(0, BaseSize, changeStart);   // 12

    // test
    QCOMPARE(pieceTable.size(), BaseSize + 12 * BaseSize);
    // all borders
    // 12: begin
    Address byteArrayOffset = 0;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[12]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 12: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[12] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[9]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 11: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[9] + HalfBaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[11]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 11: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[11] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[9] + HalfBaseSize);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 10: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[9] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[10]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 10: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[10] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, 0);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    // 8: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, HalfBaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[8]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 8: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[8] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[5]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 7: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[5] + HalfBaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[7]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 7: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[7] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[5] + HalfBaseSize);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 6: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[5] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[6]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 6: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[6] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, HalfBaseSize);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    // 4: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[4]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 4: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[4] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[1]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 3: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[1] + HalfBaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[3]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 3: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[3] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[1] + HalfBaseSize);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 2: begin
    byteArrayOffset += HalfBaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[1] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[2]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    // 2: end
    byteArrayOffset += BaseSize;
    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[2] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, byteArrayOffset);
    QVERIFY(!result);
}

void PieceTableTest::testRemove()
{
    PieceTable pieceTable;

    Address changeStarts[6];
    int storageId;
    Address storageOffset;
    bool result;

    // removing at begin
    pieceTable.init(BaseSize);
    pieceTable.remove(AddressRange(0, Start - 1));

    QCOMPARE(pieceTable.size(), BaseSize - Start);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - Start);
    QVERIFY(!result);

    // removing at middle
    pieceTable.init(BaseSize);
    pieceTable.remove(AddressRange(Start, End));

    QCOMPARE(pieceTable.size(), BaseSize - Width);
    result = pieceTable.getStorageData(&storageId, &storageOffset, Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, End + 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - Width);
    QVERIFY(!result);

    // removing at end
    pieceTable.init(BaseSize);
    pieceTable.remove(AddressRange(End + 1, BaseSize - 1));

    QCOMPARE(pieceTable.size(), End + 1);
    result = pieceTable.getStorageData(&storageId, &storageOffset, End);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End + 1);
    QVERIFY(!result);

    // removing all
    pieceTable.init(BaseSize);
    pieceTable.remove(AddressRange::fromWidth(BaseSize));

    QCOMPARE(pieceTable.size(), 0);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(!result);

    // removing a lot:
    const int pieceCount = 5;
    const int mid = (pieceCount + 1) / 2;
    const Address midPieceOffset = BaseSize * (mid - 1);
    const Size fullSize = pieceCount * BaseSize;
    // for this five equally sized pieces are inserted, reverse to offset in ChangeStore
    for (int i = 0; i < pieceCount; ++i) {
        changeStarts[pieceCount - i] = BaseSize * i;
    }

    // removing inside a piece in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset + Start, Width));

    QCOMPARE(pieceTable.size(), fullSize - Width);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset + Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid] + Start - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset + Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid] + End + 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Width);
    QVERIFY(!result);

    // removing start of a piece in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset, Start));

    QCOMPARE(pieceTable.size(), fullSize - Start);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid - 1] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid] + Start);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Start);
    QVERIFY(!result);

    // removing end of a piece in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset + End + 1, BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), fullSize - (BaseSize - End - 1));

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset + End);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid] + End);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset + End + 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid + 1]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - (BaseSize - End - 1) - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - (BaseSize - End - 1));
    QVERIFY(!result);

    // removing whole piece in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset, BaseSize));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid - 1] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid + 1]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize);
    QVERIFY(!result);

    // removing whole piece and start of next in the middke
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset, BaseSize + Start));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize - Start);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid - 1] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid + 1] + Start);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - Start);
    QVERIFY(!result);

    // removing whole piece and end of previous in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset - (BaseSize - End - 1), BaseSize + BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize - (BaseSize - End - 1));

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - (BaseSize - End - 1) - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid - 1] + End);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - (BaseSize - End - 1));
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid + 1]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1) - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1));
    QVERIFY(!result);

    // removing end of previous, whole and start of next in the middle
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(midPieceOffset - (BaseSize - End - 1), Start + BaseSize + BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize - (BaseSize - End - 1) - Start);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - (BaseSize - End - 1) - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid - 1] + BaseSize - (BaseSize - End - 1) - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, midPieceOffset - (BaseSize - End - 1));
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[mid + 1] + Start);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1) - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1) - Start);
    QVERIFY(!result);

    // removing start of piece at start
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(Start));

    QCOMPARE(pieceTable.size(), fullSize - Start);

    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[1] + Start);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - Start);
    QVERIFY(!result);

    // removing whole piece at start
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(BaseSize));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[2]);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize);
    QVERIFY(!result);

    // removing whole piece and start of next at start
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(BaseSize + Start));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize - Start);

    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[2] + Start);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - Start);
    QVERIFY(!result);

    // removing end of piece at end
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(fullSize - BaseSize + End + 1, BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), fullSize - (BaseSize - End - 1));

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize + End);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount] + End);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - (BaseSize - End - 1));
    QVERIFY(!result);

    // removing whole piece at end
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(fullSize - BaseSize, BaseSize));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount - 1] + BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize);
    QVERIFY(!result);

    // removing whole piece and end of previous at end
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(fullSize - BaseSize - (BaseSize - End - 1), BaseSize + BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), fullSize - BaseSize - (BaseSize - End - 1));

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1) - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, changeStarts[pieceCount - 1] + End);
    QCOMPARE(storageId, (int)Piece::ChangeStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, fullSize - BaseSize - (BaseSize - End - 1));
    QVERIFY(!result);

    // removing all
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.remove(AddressRange::fromWidth(fullSize));

    QCOMPARE(pieceTable.size(), 0);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(!result);
}

void PieceTableTest::testSwap()
{
    PieceTable pieceTable;

    int storageId;
    Address storageOffset;
    bool result;

    // moving end at begin
    pieceTable.init(BaseSize);
    pieceTable.swap(0, AddressRange::fromWidth(End + 1, BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, End + 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - End - 2);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - End - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, 0);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize);
    QVERIFY(!result);

    // moving end at mid
    pieceTable.init(BaseSize);
    pieceTable.swap(Start, AddressRange::fromWidth(End + 1, BaseSize - (End + 1)));

    QCOMPARE(pieceTable.size(), BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    QCOMPARE(pieceTable.size(), BaseSize);
    result = pieceTable.getStorageData(&storageId, &storageOffset, Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, End + 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start + BaseSize - End - 2);
    QVERIFY(result);
    QCOMPARE(storageOffset, BaseSize - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start + BaseSize - End - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, BaseSize);
    QVERIFY(!result);

    // moving mid at begin
    pieceTable.init(BaseSize);
    pieceTable.swap(0, AddressRange::fromWidth(Start, Width));

    QCOMPARE(pieceTable.size(), BaseSize);

    QCOMPARE(pieceTable.size(), BaseSize);
    result = pieceTable.getStorageData(&storageId, &storageOffset, 0);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Width);
    QVERIFY(result);
    QCOMPARE(storageOffset, 0);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End + 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, End + 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    // moving mid at mid
    pieceTable.init(BaseSize);
    Address mid = (End + Start) / 2;
    pieceTable.swap(Start, AddressRange::fromWidth(mid, End - mid + 1));

    QCOMPARE(pieceTable.size(), BaseSize);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start - 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start);
    QVERIFY(result);
    QCOMPARE(storageOffset, mid);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start + End - mid);
    QVERIFY(result);
    QCOMPARE(storageOffset, End);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, Start + End - mid + 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, Start);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End);
    QVERIFY(result);
    QCOMPARE(storageOffset, mid - 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    result = pieceTable.getStorageData(&storageId, &storageOffset, End + 1);
    QVERIFY(result);
    QCOMPARE(storageOffset, End + 1);
    QCOMPARE(storageId, (int)Piece::OriginalStorage);

    // moving a lot:
    const int pieceCount = 5;
    const Size fullSize = pieceCount * BaseSize;

    // moving start of piece at start
    fillWithSize(&pieceTable, pieceCount);
    pieceTable.swap(Start, AddressRange::fromWidth(mid, End - mid + 1));

    QCOMPARE(pieceTable.size(), fullSize);
    // TODO: add other tests
}

}

QTEST_GUILESS_MAIN(KPieceTable::PieceTableTest)
