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#include <QtTest/QtTest>

#include <qpixmapcache.h>

#include "../../../src/gui/image/qpixmapcache_p.h"

//TESTED_CLASS=

//TESTED_FILES=

class tst_QPixmapCache : public QObject

{

    Q_OBJECT

public:

    tst_QPixmapCache();

    virtual ~tst_QPixmapCache();

public slots:

    void init();

private slots:

    void cacheLimit();

    void setCacheLimit();

    void find();

    void insert();

    void replace();

    void remove();

    void clear();

    void pixmapKey();

};

static QPixmapCache::KeyData* getPrivate(QPixmapCache::Key &key)

{

    return (*reinterpret_cast<QPixmapCache::KeyData**>(&key));

}

static QPixmapCache::KeyData** getPrivateRef(QPixmapCache::Key &key)

{

    return (reinterpret_cast<QPixmapCache::KeyData**>(&key));

}

static int originalCacheLimit;

tst_QPixmapCache::tst_QPixmapCache()

{

    originalCacheLimit = QPixmapCache::cacheLimit();

}

tst_QPixmapCache::~tst_QPixmapCache()

{

}

void tst_QPixmapCache::init()

{

    QPixmapCache::setCacheLimit(originalCacheLimit);

    QPixmapCache::clear();

}

void tst_QPixmapCache::cacheLimit()

{

    // make sure the default is reasonable;

    // it was between 2048 and 10240 last time I looked at it

    QVERIFY(originalCacheLimit >= 1024 && originalCacheLimit <= 20480);

    QPixmapCache::setCacheLimit(100);

    QCOMPARE(QPixmapCache::cacheLimit(), 100);

    QPixmapCache::setCacheLimit(-50);

    QCOMPARE(QPixmapCache::cacheLimit(), -50);

}

void tst_QPixmapCache::setCacheLimit()

{

    QPixmap *p1 = new QPixmap(2, 3);

    QPixmapCache::insert("P1", *p1);

    QVERIFY(QPixmapCache::find("P1") != 0);

    delete p1;

    QPixmapCache::setCacheLimit(0);

    QVERIFY(QPixmapCache::find("P1") == 0);

    p1 = new QPixmap(2, 3);

    QPixmapCache::setCacheLimit(1000);

    QPixmapCache::insert("P1", *p1);

    QVERIFY(QPixmapCache::find("P1") != 0);

    delete p1;

    //The int part of the API

    p1 = new QPixmap(2, 3);

    QPixmapCache::Key key = QPixmapCache::insert(*p1);

    QVERIFY(QPixmapCache::find(key, p1) != 0);

    delete p1;

    QPixmapCache::setCacheLimit(0);

    QVERIFY(QPixmapCache::find(key, p1) == 0);

    p1 = new QPixmap(2, 3);

    QPixmapCache::setCacheLimit(1000);

    QPixmapCache::replace(key, *p1);

    QVERIFY(QPixmapCache::find(key, p1) == 0);

    delete p1;

    //Let check if keys are released when the pixmap cache is

    //full or has been flushed.

    QPixmapCache::clear();

    p1 = new QPixmap(2, 3);

    key = QPixmapCache::insert(*p1);

    QVERIFY(QPixmapCache::find(key, p1) != 0);

    QPixmapCache::setCacheLimit(0);

    QVERIFY(QPixmapCache::find(key, p1) == 0);

    QPixmapCache::setCacheLimit(1000);

    key = QPixmapCache::insert(*p1);

    QCOMPARE(getPrivate(key)->isValid, true);

    QCOMPARE(getPrivate(key)->key, 1);

    delete p1;

    //Let check if removing old entries doesn't let you get

    // wrong pixmaps

    QPixmapCache::clear();

    QPixmap p2;

    p1 = new QPixmap(2, 3);

    key = QPixmapCache::insert(*p1);

    QVERIFY(QPixmapCache::find(key, &p2) != 0);

    //we flush the cache

    QPixmapCache::setCacheLimit(0);

    QPixmapCache::setCacheLimit(1000);

    QPixmapCache::Key key2 = QPixmapCache::insert(*p1);

    QCOMPARE(getPrivate(key2)->key, 1);

    QVERIFY(QPixmapCache::find(key, &p2) == 0);

    QVERIFY(QPixmapCache::find(key2, &p2) != 0);

    QCOMPARE(p2, *p1);

    delete p1;

    //Here we simulate the flushing when the app is idle

    /*QPixmapCache::clear();

    QPixmapCache::setCacheLimit(originalCacheLimit);

    p1 = new QPixmap(300, 300);

    key = QPixmapCache::insert(*p1);

    QCOMPARE(getPrivate(key)->key, 1);

    key2 = QPixmapCache::insert(*p1);

    key2 = QPixmapCache::insert(*p1);

    QPixmapCache::Key key3 = QPixmapCache::insert(*p1);

    QTest::qWait(32000);

    key2 = QPixmapCache::insert(*p1);

    QCOMPARE(getPrivate(key2)->key, 1);

    //This old key is not valid anymore after the flush

    QCOMPARE(getPrivate(key)->isValid, false);

    QVERIFY(QPixmapCache::find(key, &p2) == 0);

    delete p1;*/

}

void tst_QPixmapCache::find()

{

    QPixmap p1(10, 10);

    p1.fill(Qt::red);

    QVERIFY(QPixmapCache::insert("P1", p1));

    QPixmap p2;

    QVERIFY(QPixmapCache::find("P1", p2));

    QCOMPARE(p2.width(), 10);

    QCOMPARE(p2.height(), 10);

    QCOMPARE(p1, p2);

    // obsolete

    QPixmap *p3 = QPixmapCache::find("P1");

    QVERIFY(p3);

    QCOMPARE(p1, *p3);

    //The int part of the API

    QPixmapCache::Key key = QPixmapCache::insert(p1);

    QVERIFY(QPixmapCache::find(key, &p2));

    QCOMPARE(p2.width(), 10);

    QCOMPARE(p2.height(), 10);

    QCOMPARE(p1, p2);

    QPixmapCache::clear();

    QPixmapCache::setCacheLimit(128);

    key = QPixmapCache::insert(p1);

    //The int part of the API

    QList<QPixmapCache::Key> keys;

    for (int i = 0; i < 4000; ++i)

        QPixmapCache::insert(p1);

    //at that time the first key has been erase because no more place in the cache

    QVERIFY(QPixmapCache::find(key, &p1) == 0);

    QCOMPARE(getPrivate(key)->isValid, false);

}

void tst_QPixmapCache::insert()

{

    QPixmap p1(10, 10);

    p1.fill(Qt::red);

    QPixmap p2(10, 10);

    p2.fill(Qt::yellow);

    // Calcuate estimated num of items what fits to cache

    int estimatedNum = (1024 * QPixmapCache::cacheLimit())

                       / ((p1.width() * p1.height() * p1.depth()) / 8);

    // Mare sure we will put enough items to reach the cache limit

    const int numberOfKeys = estimatedNum + 1000;

    // make sure it doesn't explode

    for (int i = 0; i < numberOfKeys; ++i)

        QPixmapCache::insert("0", p1);

    // ditto

    for (int j = 0; j < numberOfKeys; ++j)

        QPixmapCache::insert(QString::number(j), p1);

    int num = 0;

    for (int k = 0; k < numberOfKeys; ++k) {

        if (QPixmapCache::find(QString::number(k)))

            ++num;

    }

    if (QPixmapCache::find("0"))

        ++num;

    QVERIFY(num <= estimatedNum);

    QPixmap p3;

    QPixmapCache::insert("null", p3);

    QPixmap c1(10, 10);

    c1.fill(Qt::yellow);

    QPixmapCache::insert("custom", c1);

    QVERIFY(!c1.isDetached());

    QPixmap c2(10, 10);

    c2.fill(Qt::red);

    QPixmapCache::insert("custom", c2);

    //We have deleted the old pixmap in the cache for the same key

    QVERIFY(c1.isDetached());

    //The int part of the API

    // make sure it doesn't explode

    QList<QPixmapCache::Key> keys;

    for (int i = 0; i < numberOfKeys; ++i)

        keys.append(QPixmapCache::insert(p1));

    num = 0;

    for (int k = 0; k < numberOfKeys; ++k) {

        if (QPixmapCache::find(keys.at(k), &p2))

            ++num;

    }

    estimatedNum = (1024 * QPixmapCache::cacheLimit())

                       / ((p1.width() * p1.height() * p1.depth()) / 8);

    QVERIFY(num <= estimatedNum);

}

void tst_QPixmapCache::replace()

{

    //The int part of the API

    QPixmap p1(10, 10);

    p1.fill(Qt::red);

    QPixmap p2(10, 10);

    p2.fill(Qt::yellow);

    QPixmapCache::Key key = QPixmapCache::insert(p1);

    QCOMPARE(getPrivate(key)->isValid, true);

    QPixmap p3;

    QVERIFY(QPixmapCache::find(key, &p3) == 1);

    QPixmapCache::replace(key, p2);

    QVERIFY(QPixmapCache::find(key, &p3) == 1);

    QCOMPARE(getPrivate(key)->isValid, true);

    QCOMPARE(getPrivate(key)->key, 1);

    QCOMPARE(p3.width(), 10);

    QCOMPARE(p3.height(), 10);

    QCOMPARE(p3, p2);

    //Broken keys

    QCOMPARE(QPixmapCache::replace(QPixmapCache::Key(), p2), false);

}

void tst_QPixmapCache::remove()

{

    QPixmap p1(10, 10);

    p1.fill(Qt::red);

    QPixmapCache::insert("red", p1);

    p1.fill(Qt::yellow);

    QPixmap p2;

    QVERIFY(QPixmapCache::find("red", p2));

    QVERIFY(p1.toImage() != p2.toImage());

    QVERIFY(p1.toImage() == p1.toImage()); // sanity check

    QPixmapCache::remove("red");

    QVERIFY(QPixmapCache::find("red") == 0);

    QPixmapCache::remove("red");

    QVERIFY(QPixmapCache::find("red") == 0);

    QPixmapCache::remove("green");

    QVERIFY(QPixmapCache::find("green") == 0);

    //The int part of the API

    QPixmapCache::clear();

    p1.fill(Qt::red);

    QPixmapCache::Key key = QPixmapCache::insert(p1);

    p1.fill(Qt::yellow);

    QVERIFY(QPixmapCache::find(key, &p2));

    QVERIFY(p1.toImage() != p2.toImage());

    QVERIFY(p1.toImage() == p1.toImage()); // sanity check

    QPixmapCache::remove(key);

    QVERIFY(QPixmapCache::find(key, &p1) == 0);

    //Broken key

    QPixmapCache::remove(QPixmapCache::Key());

    QVERIFY(QPixmapCache::find(QPixmapCache::Key(), &p1) == 0);

    //Test if keys are release

    QPixmapCache::clear();

    key = QPixmapCache::insert(p1);

    QCOMPARE(getPrivate(key)->key, 1);

    QPixmapCache::remove(key);

    key = QPixmapCache::insert(p1);

    QCOMPARE(getPrivate(key)->key, 1);

    //Test if pixmaps are correctly deleted

    QPixmapCache::clear();

    key = QPixmapCache::insert(p1);

    QCOMPARE(getPrivate(key)->key, 1);

    QVERIFY(QPixmapCache::find(key, &p1) != 0);

    QPixmapCache::remove(key);

    QCOMPARE(p1.isDetached(), true);

    //We mix both part of the API

    QPixmapCache::clear();

    p1.fill(Qt::red);

    QPixmapCache::insert("red", p1);

    key = QPixmapCache::insert(p1);

    QPixmapCache::remove(key);

    QVERIFY(QPixmapCache::find(key, &p1) == 0);

    QVERIFY(QPixmapCache::find("red") != 0);

}

void tst_QPixmapCache::clear()

{

    QPixmap p1(10, 10);

    p1.fill(Qt::red);

    // Calcuate estimated num of items what fits to cache

    int estimatedNum = (1024 * QPixmapCache::cacheLimit())

                       / ((p1.width() * p1.height() * p1.depth()) / 8);

    // Mare sure we will put enough items to reach the cache limit

    const int numberOfKeys = estimatedNum + 1000;

    for (int i = 0; i < numberOfKeys; ++i)

        QVERIFY(QPixmapCache::find("x" + QString::number(i)) == 0);

    for (int j = 0; j < numberOfKeys; ++j)

        QPixmapCache::insert(QString::number(j), p1);

    int num = 0;

    for (int k = 0; k < numberOfKeys; ++k) {

        if (QPixmapCache::find(QString::number(k), p1))

            ++num;

    }

    QVERIFY(num > 0);

    QPixmapCache::clear();

    for (int k = 0; k < numberOfKeys; ++k)

        QVERIFY(QPixmapCache::find(QString::number(k)) == 0);

    //The int part of the API

    QPixmap p2(10, 10);

    p2.fill(Qt::red);

    QList<QPixmapCache::Key> keys;

    for (int k = 0; k < numberOfKeys; ++k)

        keys.append(QPixmapCache::insert(p2));

    QPixmapCache::clear();

    for (int k = 0; k < numberOfKeys; ++k) {

        QVERIFY(QPixmapCache::find(keys.at(k), &p1) == 0);

        QCOMPARE(getPrivate(keys[k])->isValid, false);

    }

}

void tst_QPixmapCache::pixmapKey()

{

    QPixmapCache::Key key;

    //Default constructed keys have no d pointer unless

    //we use them

    QVERIFY(!getPrivate(key));

    //Let's put a d pointer

    QPixmapCache::KeyData** keyd = getPrivateRef(key);

    *keyd = new QPixmapCache::KeyData;

    QCOMPARE(getPrivate(key)->ref, 1);

    QPixmapCache::Key key2;

    //Let's put a d pointer

    QPixmapCache::KeyData** key2d = getPrivateRef(key2);

    *key2d = new QPixmapCache::KeyData;

    QCOMPARE(getPrivate(key2)->ref, 1);

    key = key2;

    QCOMPARE(getPrivate(key2)->ref, 2);

    QCOMPARE(getPrivate(key)->ref, 2);

    QPixmapCache::Key key3;

    //Let's put a d pointer

    QPixmapCache::KeyData** key3d = getPrivateRef(key3);

    *key3d = new QPixmapCache::KeyData;

    QPixmapCache::Key key4 = key3;

    QCOMPARE(getPrivate(key3)->ref, 2);

    QCOMPARE(getPrivate(key4)->ref, 2);

    key4 = key;

    QCOMPARE(getPrivate(key4)->ref, 3);

    QCOMPARE(getPrivate(key3)->ref, 1);

    QPixmapCache::Key key5(key3);

    QCOMPARE(getPrivate(key3)->ref, 2);

    QCOMPARE(getPrivate(key5)->ref, 2);

    //let test default constructed keys

    QPixmapCache::Key key6;

    QVERIFY(!getPrivate(key6));

    QPixmapCache::Key key7;

    QVERIFY(!getPrivate(key7));

    key6 = key7;

    QVERIFY(!getPrivate(key6));

    QVERIFY(!getPrivate(key7));

    QPixmapCache::Key key8(key7);

    QVERIFY(!getPrivate(key8));

}

QTEST_MAIN(tst_QPixmapCache)

#include "tst_qpixmapcache.moc"