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#include <QtTest/QtTest>
#include <QtQml/qqmlengine.h>
#include <QtQuick/qquickview.h>
#include <QtQuick/qquickitem.h>
#include <QtQml/private/qqmlengine_p.h>
#include <QtQml/private/qqmltypeloader_p.h>
#include <QtQml/private/qqmlcompiler_p.h>
#include "../../shared/util.h"

class tst_QQMLTypeLoader : public QQmlDataTest
{
    Q_OBJECT

private slots:
    void testLoadComplete();
    void loadComponentSynchronously();
    void trimCache();
    void trimCache2();
};

void tst_QQMLTypeLoader::testLoadComplete()
{
    QQuickView *window = new QQuickView();
    window->engine()->addImportPath(QT_TESTCASE_BUILDDIR);
    qDebug() << window->engine()->importPathList();
    window->setGeometry(0,0,240,320);
    window->setSource(testFileUrl("test_load_complete.qml"));
    window->show();
    QVERIFY(QTest::qWaitForWindowExposed(window));

    QObject *rootObject = window->rootObject();
    QTRY_VERIFY(rootObject != 0);
    QTRY_COMPARE(rootObject->property("created").toInt(), 2);
    QTRY_COMPARE(rootObject->property("loaded").toInt(), 2);
    delete window;
}

void tst_QQMLTypeLoader::loadComponentSynchronously()
{
    QQmlEngine engine;
    QTest::ignoreMessage(QtWarningMsg, QRegularExpression(
                             QLatin1String(".*nonprotocol::1:1: QtObject is not a type.*")));
    QQmlComponent component(&engine, testFileUrl("load_synchronous.qml"));
    QObject *o = component.create();
    QVERIFY(o);
}

void tst_QQMLTypeLoader::trimCache()
{
    QQmlEngine engine;
    QQmlTypeLoader &loader = QQmlEnginePrivate::get(&engine)->typeLoader;
    for (int i = 0; i < 256; ++i) {
        QUrl url = testFileUrl("trim_cache.qml");
        url.setQuery(QString::number(i));

        QQmlTypeData *data = loader.getType(url);
        // Run an event loop to receive the callback that release()es.
        QTRY_COMPARE(data->count(), 2);

        // keep references to some of them so that they aren't trimmed. References to either the
        // QQmlTypeData or its compiledData() should prevent the trimming.
        if (i % 10 == 0) {
            // keep ref on data, don't add ref on data->compiledData()
        } else if (i % 5 == 0) {
            data->compiledData()->addref();
            data->release();
        } else {
            data->release();
        }
    }

    for (int i = 0; i < 256; ++i) {
        QUrl url = testFileUrl("trim_cache.qml");
        url.setQuery(QString::number(i));
        if (i % 5 == 0)
            QVERIFY(loader.isTypeLoaded(url));
        else if (i < 128)
            QVERIFY(!loader.isTypeLoaded(url));
        // The cache is free to keep the others.
    }
}

void tst_QQMLTypeLoader::trimCache2()
{
    QQuickView *window = new QQuickView();
    window->setSource(testFileUrl("trim_cache2.qml"));
    QQmlTypeLoader &loader = QQmlEnginePrivate::get(window->engine())->typeLoader;
    // in theory if gc has already run this could be false
    // QCOMPARE(loader.isTypeLoaded(testFileUrl("MyComponent2.qml")), true);
    window->engine()->collectGarbage();
    QTest::qWait(1);    // force event loop
    window->engine()->trimComponentCache();
    QCOMPARE(loader.isTypeLoaded(testFileUrl("MyComponent2.qml")), false);
}

QTEST_MAIN(tst_QQMLTypeLoader)

#include "tst_qqmltypeloader.moc"
