Esempi in C++ (Cpp) per QStringList::constFirst

Esempio n. 1

void tst_qmldiskcache::cacheResources()
{
    const QString cacheDirectory = QStandardPaths::writableLocation(QStandardPaths::CacheLocation);
    QVERIFY(QDir::root().mkpath(cacheDirectory));

    const QString qmlCacheDirectory = cacheDirectory + QLatin1String("/qmlcache/");
    QVERIFY(QDir(qmlCacheDirectory).removeRecursively());
    QVERIFY(QDir::root().mkpath(qmlCacheDirectory));
    QVERIFY(QDir(qmlCacheDirectory).entryList(QDir::NoDotAndDotDot).isEmpty());


    QQmlEngine engine;

    {
        CleanlyLoadingComponent component(&engine, QUrl("qrc:/test.qml"));
        QScopedPointer<QObject> obj(component.create());
        QVERIFY(!obj.isNull());
        QCOMPARE(obj->property("value").toInt(), 20);
    }

    const QStringList entries = QDir(qmlCacheDirectory).entryList(QDir::NoDotAndDotDot | QDir::Files);
    QCOMPARE(entries.count(), 1);

    QDateTime cacheFileTimeStamp;

    {
        QFile cacheFile(qmlCacheDirectory + QLatin1Char('/') + entries.constFirst());
        QVERIFY2(cacheFile.open(QIODevice::ReadOnly), qPrintable(cacheFile.errorString()));
        QV4::CompiledData::Unit unit;
        QVERIFY(cacheFile.read(reinterpret_cast<char *>(&unit), sizeof(unit)) == sizeof(unit));

        cacheFileTimeStamp = QFileInfo(cacheFile.fileName()).lastModified();

        QDateTime referenceTimeStamp = QFileInfo(":/test.qml").lastModified();
        if (!referenceTimeStamp.isValid())
            referenceTimeStamp = QFileInfo(QCoreApplication::applicationFilePath()).lastModified();
        QCOMPARE(qint64(unit.sourceTimeStamp), referenceTimeStamp.toMSecsSinceEpoch());
    }

    waitForFileSystem();

    {
        CleanlyLoadingComponent component(&engine, QUrl("qrc:///test.qml"));
        QScopedPointer<QObject> obj(component.create());
        QVERIFY(!obj.isNull());
        QCOMPARE(obj->property("value").toInt(), 20);
    }

    {
        const QStringList entries = QDir(qmlCacheDirectory).entryList(QDir::NoDotAndDotDot | QDir::Files);
        QCOMPARE(entries.count(), 1);

        QCOMPARE(QFileInfo(qmlCacheDirectory + QLatin1Char('/') + entries.constFirst()).lastModified().toMSecsSinceEpoch(), cacheFileTimeStamp.toMSecsSinceEpoch());
    }
}