/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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** $QT_END_LICENSE$
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****************************************************************************/

#include <qtest.h>

#include <QQmlComponent>
#include <QQmlEngine>
#include <QProcess>
#include <QLibraryInfo>
#include <QStandardPaths>
#include <QSysInfo>
#include <QLoggingCategory>
#include <private/qqmlcomponent_p.h>
#include <qtranslator.h>

#include "../../shared/util.h"

class tst_qmlcachegen: public QQmlDataTest
{
    Q_OBJECT

private slots:
    void initTestCase();

    void loadGeneratedFile();
    void translationExpressionSupport();
    void signalHandlerParameters();
    void errorOnArgumentsInSignalHandler();
    void aheadOfTimeCompilation();
    void functionExpressions();
    void versionChecksForAheadOfTimeUnits();
    void retainedResources();

    void workerScripts();

    void trickyPaths_data();
    void trickyPaths();

    void qrcScriptImport();
    void fsScriptImport();
    void moduleScriptImport();
    void esModulesViaQJSEngine();

    void enums();

    void sourceFileIndices();

    void reproducibleCache_data();
    void reproducibleCache();
};

// A wrapper around QQmlComponent to ensure the temporary reference counts
// on the type data as a result of the main thread <> loader thread communication
// are dropped. Regular Synchronous loading will leave us with an event posted
// to the gui thread and an extra refcount that will only be dropped after the
// event delivery. A plain sendPostedEvents() however is insufficient because
// we can't be sure that the event is posted after the constructor finished.
class CleanlyLoadingComponent : public QQmlComponent
{
public:
    CleanlyLoadingComponent(QQmlEngine *engine, const QUrl &url)
        : QQmlComponent(engine, url, QQmlComponent::Asynchronous)
    { waitForLoad(); }
    CleanlyLoadingComponent(QQmlEngine *engine, const QString &fileName)
        : QQmlComponent(engine, fileName, QQmlComponent::Asynchronous)
    { waitForLoad(); }

    void waitForLoad()
    {
        QTRY_VERIFY(status() == QQmlComponent::Ready || status() == QQmlComponent::Error);
    }
};

static bool generateCache(const QString &qmlFileName, QByteArray *capturedStderr = nullptr)
{
    QProcess proc;
    if (capturedStderr == nullptr)
        proc.setProcessChannelMode(QProcess::ForwardedChannels);
    proc.setProgram(QLibraryInfo::location(QLibraryInfo::BinariesPath) + QDir::separator() + QLatin1String("qmlcachegen"));
    proc.setArguments(QStringList() << qmlFileName);
    proc.start();
    if (!proc.waitForFinished())
        return false;

    if (capturedStderr)
        *capturedStderr = proc.readAllStandardError();

    if (proc.exitStatus() != QProcess::NormalExit)
        return false;
    return proc.exitCode() == 0;
}

void tst_qmlcachegen::initTestCase()
{
    qputenv("QML_FORCE_DISK_CACHE", "1");
    QStandardPaths::setTestModeEnabled(true);

    // make sure there's no pre-existing cache dir
    QString cacheDir = QStandardPaths::writableLocation(QStandardPaths::CacheLocation);
    if (!cacheDir.isEmpty())
        //QDir(cacheDir).removeRecursively();
        qDebug() << cacheDir;
}

void tst_qmlcachegen::loadGeneratedFile()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile("test.qml", "import QtQml 2.0\n"
                                                           "QtObject {\n"
                                                           "    property int value: Math.min(100, 42);\n"
                                                           "}");

    QVERIFY(generateCache(testFilePath));

    const QString cacheFilePath = testFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(cacheFilePath));

    {
        QFile cache(cacheFilePath);
        QVERIFY(cache.open(QIODevice::ReadOnly));
        const QV4::CompiledData::Unit *cacheUnit = reinterpret_cast<const QV4::CompiledData::Unit *>(cache.map(/*offset*/0, sizeof(QV4::CompiledData::Unit)));
        QVERIFY(cacheUnit);
        QVERIFY(cacheUnit->flags & QV4::CompiledData::Unit::StaticData);
        QVERIFY(cacheUnit->flags & QV4::CompiledData::Unit::PendingTypeCompilation);
        QCOMPARE(uint(cacheUnit->sourceFileIndex), uint(0));
    }

    QVERIFY(QFile::remove(testFilePath));

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QCOMPARE(obj->property("value").toInt(), 42);

    auto componentPrivate = QQmlComponentPrivate::get(&component);
    QVERIFY(componentPrivate);
    auto compilationUnit = componentPrivate->compilationUnit;
    QVERIFY(compilationUnit);
    auto unitData = compilationUnit->unitData();
    QVERIFY(unitData);
    QVERIFY(unitData->flags & QV4::CompiledData::Unit::StaticData);
}

class QTestTranslator : public QTranslator
{
public:
    QString translate(const char *context, const char *sourceText, const char */*disambiguation*/, int /*n*/) const override
    {
        m_lastContext = QString::fromUtf8(context);
        return QString::fromUtf8(sourceText).toUpper();
    }
    bool isEmpty() const override { return true; }
    mutable QString m_lastContext;
};

void tst_qmlcachegen::translationExpressionSupport()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    QTestTranslator translator;
    qApp->installTranslator(&translator);

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile("test.qml", "import QtQml.Models 2.2\n"
                                                           "import QtQml 2.2\n"
                                                           "QtObject {\n"
                                                           "    property ListModel model: ListModel {\n"
                                                           "        ListElement {\n"
                                                           "            text: qsTr(\"All\")\n"
                                                           "        }\n"
                                                           "        ListElement {\n"
                                                           "            text: QT_TR_NOOP(\"Ok\")\n"
                                                           "        }\n"
                                                           "    }\n"
                                                           "    property string text: model.get(0).text + \" \" + model.get(1).text\n"
                                                           "}");


    QVERIFY(generateCache(testFilePath));

    const QString cacheFilePath = testFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(cacheFilePath));
    QVERIFY(QFile::remove(testFilePath));

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QCOMPARE(obj->property("text").toString(), QString("ALL Ok"));
    QCOMPARE(translator.m_lastContext, QStringLiteral("test"));
}

void tst_qmlcachegen::signalHandlerParameters()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile("test.qml", "import QtQml 2.0\n"
                                                           "QtObject {\n"
                                                           "    property real result: 0\n"
                                                           "    signal testMe(real value);\n"
                                                           "    onTestMe: result = value;\n"
                                                           "    function runTest() { testMe(42); }\n"
                                                           "}");

    QVERIFY(generateCache(testFilePath));

    const QString cacheFilePath = testFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(cacheFilePath));
    QVERIFY(QFile::remove(testFilePath));

    {
        QFile cache(cacheFilePath);
        QVERIFY(cache.open(QIODevice::ReadOnly));
        const QV4::CompiledData::Unit *cacheUnit = reinterpret_cast<const QV4::CompiledData::Unit *>(cache.map(/*offset*/0, sizeof(QV4::CompiledData::Unit)));
        QVERIFY(cacheUnit);
    }

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QMetaObject::invokeMethod(obj.data(), "runTest");
    QCOMPARE(obj->property("result").toInt(), 42);

    {
        auto componentPrivate = QQmlComponentPrivate::get(&component);
        QVERIFY(componentPrivate);
        auto compilationUnit = componentPrivate->compilationUnit;
        QVERIFY(compilationUnit);
        QVERIFY(compilationUnit->unitData());

        // Verify that the QML objects don't come from the original data.
        QVERIFY(compilationUnit->objectAt(0) != compilationUnit->unitData()->qmlUnit()->objectAt(0));

        // Typically the final file name is one of those strings that is not in the original
        // pre-compiled qml file's string table, while for example the signal parameter
        // name ("value") is.
        const auto isStringIndexInStringTable = [compilationUnit](uint index) {
            return index < compilationUnit->unitData()->stringTableSize;
        };

        QVERIFY(isStringIndexInStringTable(compilationUnit->objectAt(0)->signalAt(0)->parameterAt(0)->nameIndex));
        QVERIFY(!compilationUnit->dynamicStrings.isEmpty());
    }
}

void tst_qmlcachegen::errorOnArgumentsInSignalHandler()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile("test.qml", "import QtQml 2.2\n"
                                                           "QtObject {\n"
                                                           "    signal mySignal(var arguments);\n"
                                                           "    onMySignal: console.log(arguments);\n"
                                                           "}");


    QByteArray errorOutput;
    QVERIFY(!generateCache(testFilePath, &errorOutput));
    QVERIFY2(errorOutput.contains("error: The use of eval() or the use of the arguments object in signal handlers is"), errorOutput);
}

void tst_qmlcachegen::aheadOfTimeCompilation()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile("test.qml", "import QtQml 2.0\n"
                                                           "QtObject {\n"
                                                           "    function runTest() { var x = 0; while (x < 42) { ++x }; return x; }\n"
                                                           "}");

    QVERIFY(generateCache(testFilePath));

    const QString cacheFilePath = testFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(cacheFilePath));
    QVERIFY(QFile::remove(testFilePath));

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QVariant result;
    QMetaObject::invokeMethod(obj.data(), "runTest", Q_RETURN_ARG(QVariant, result));
    QCOMPARE(result.toInt(), 42);
}

static QQmlPrivate::CachedQmlUnit *temporaryModifiedCachedUnit = nullptr;

void tst_qmlcachegen::versionChecksForAheadOfTimeUnits()
{
    QVERIFY(QFile::exists(":/data/versionchecks.qml"));
    QCOMPARE(QFileInfo(":/data/versionchecks.qml").size(), 0);

    Q_ASSERT(!temporaryModifiedCachedUnit);
    QQmlMetaType::CachedUnitLookupError error = QQmlMetaType::CachedUnitLookupError::NoError;
    const QV4::CompiledData::Unit *originalUnit = QQmlMetaType::findCachedCompilationUnit(
            QUrl("qrc:/data/versionchecks.qml"), &error);
    QVERIFY(originalUnit);
    QV4::CompiledData::Unit *tweakedUnit = (QV4::CompiledData::Unit *)malloc(originalUnit->unitSize);
    memcpy(reinterpret_cast<void *>(tweakedUnit), reinterpret_cast<const void *>(originalUnit), originalUnit->unitSize);
    tweakedUnit->version = QV4_DATA_STRUCTURE_VERSION - 1;
    temporaryModifiedCachedUnit = new QQmlPrivate::CachedQmlUnit{tweakedUnit, nullptr, nullptr};

    auto testHandler = [](const QUrl &url) -> const QQmlPrivate::CachedQmlUnit * {
        if (url == QUrl("qrc:/data/versionchecks.qml"))
            return temporaryModifiedCachedUnit;
        return nullptr;
    };
    QQmlMetaType::prependCachedUnitLookupFunction(testHandler);

    {
        QQmlMetaType::CachedUnitLookupError error = QQmlMetaType::CachedUnitLookupError::NoError;
        QVERIFY(!QQmlMetaType::findCachedCompilationUnit(QUrl("qrc:/data/versionchecks.qml"), &error));
        QCOMPARE(error, QQmlMetaType::CachedUnitLookupError::VersionMismatch);
    }

    {
        QQmlEngine engine;
        QQmlComponent component(&engine, QUrl("qrc:/data/versionchecks.qml"));
        QCOMPARE(component.status(), QQmlComponent::Error);
        QCOMPARE(component.errorString(),
                 QString("qrc:/data/versionchecks.qml:-1 File was compiled ahead of time with an "
                         "incompatible version of Qt and the original file cannot be found. Please "
                         "recompile\n"));
    }

    Q_ASSERT(temporaryModifiedCachedUnit);
    free(const_cast<QV4::CompiledData::Unit *>(temporaryModifiedCachedUnit->qmlData));
    delete temporaryModifiedCachedUnit;
    temporaryModifiedCachedUnit = nullptr;

    QQmlMetaType::removeCachedUnitLookupFunction(testHandler);
}

void tst_qmlcachegen::retainedResources()
{
    QFile file(":/Retain.qml");
    QVERIFY(file.open(QIODevice::ReadOnly));
    QVERIFY(file.readAll().startsWith("import QtQml 2.0"));
}

void tst_qmlcachegen::workerScripts()
{
    QVERIFY(QFile::exists(":/workerscripts/data/worker.js"));
    QVERIFY(QFile::exists(":/workerscripts/data/worker.qml"));
    QCOMPARE(QFileInfo(":/workerscripts/data/worker.js").size(), 0);

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl("qrc:///workerscripts/data/worker.qml"));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QTRY_VERIFY(obj->property("success").toBool());
}

void tst_qmlcachegen::functionExpressions()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile(
                "test.qml",
                "import QtQuick 2.0\n"
                "Item {\n"
                "    id: di\n"
                "    \n"
                "    property var f\n"
                "    property bool f_called: false\n"
                "    f : function() { f_called = true }\n"
                "    \n"
                "    signal g\n"
                "    property bool g_handler_called: false\n"
                "    onG: function() { g_handler_called = true }\n"
                "    \n"
                "    signal h(int i)\n"
                "    property bool h_connections_handler_called: false\n"
                "    Connections {\n"
                "        target: di\n"
                "        onH: function(magic) { h_connections_handler_called = (magic == 42)\n }\n"
                "    }\n"
                "    \n"
                "    function runTest() { \n"
                "        f()\n"
                "        g()\n"
                "        h(42)\n"
                "    }\n"
                "}");

    QVERIFY(generateCache(testFilePath));

    const QString cacheFilePath = testFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(cacheFilePath));
    QVERIFY(QFile::remove(testFilePath));

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());

    QCOMPARE(obj->property("f_called").toBool(), false);
    QCOMPARE(obj->property("g_handler_called").toBool(), false);
    QCOMPARE(obj->property("h_connections_handler_called").toBool(), false);

    QMetaObject::invokeMethod(obj.data(), "runTest");

    QCOMPARE(obj->property("f_called").toBool(), true);
    QCOMPARE(obj->property("g_handler_called").toBool(), true);
    QCOMPARE(obj->property("h_connections_handler_called").toBool(), true);
}

void tst_qmlcachegen::trickyPaths_data()
{
    QTest::addColumn<QString>("filePath");
    QTest::newRow("path with spaces") << QStringLiteral(":/directory with spaces/file name with spaces.qml");
    QTest::newRow("version style suffix 1") << QStringLiteral(":/directory with spaces/versionStyleSuffix-1.2-core-yc.qml");
    QTest::newRow("version style suffix 2") << QStringLiteral(":/directory with spaces/versionStyleSuffix-1.2-more.qml");

    // QTBUG-46375
#if !defined(Q_OS_WIN)
    QTest::newRow("path with umlaut") << QStringLiteral(":/Bäh.qml");
#endif
}

void tst_qmlcachegen::trickyPaths()
{
    QFETCH(QString, filePath);
    QVERIFY2(QFile::exists(filePath), qPrintable(filePath));
    QCOMPARE(QFileInfo(filePath).size(), 0);
    QQmlEngine engine;
    QQmlComponent component(&engine, QUrl("qrc" + filePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QCOMPARE(obj->property("success").toInt(), 42);
}

void tst_qmlcachegen::qrcScriptImport()
{
    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl("qrc:///data/jsimport.qml"));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QTRY_COMPARE(obj->property("value").toInt(), 42);
}

void tst_qmlcachegen::fsScriptImport()
{
    QTemporaryDir tempDir;
    QVERIFY(tempDir.isValid());

    const auto writeTempFile = [&tempDir](const QString &fileName, const char *contents) {
        QFile f(tempDir.path() + '/' + fileName);
        const bool ok = f.open(QIODevice::WriteOnly | QIODevice::Truncate);
        Q_ASSERT(ok);
        f.write(contents);
        return f.fileName();
    };

    const QString testFilePath = writeTempFile(
            "test.qml",
            "import QtQml 2.0\n"
            "import \"test.js\" as ScriptTest\n"
            "QtObject {\n"
            "    property int value: ScriptTest.value\n"
            "}\n");

    const QString scriptFilePath = writeTempFile(
            "test.js",
            "var value = 42"
            );

    QVERIFY(generateCache(scriptFilePath));
    QVERIFY(generateCache(testFilePath));

    const QString scriptCacheFilePath = scriptFilePath + QLatin1Char('c');
    QVERIFY(QFile::exists(scriptFilePath));

    {
        QFile cache(scriptCacheFilePath);
        QVERIFY(cache.open(QIODevice::ReadOnly));
        const QV4::CompiledData::Unit *cacheUnit = reinterpret_cast<const QV4::CompiledData::Unit *>(cache.map(/*offset*/0, sizeof(QV4::CompiledData::Unit)));
        QVERIFY(cacheUnit);
        QVERIFY(cacheUnit->flags & QV4::CompiledData::Unit::StaticData);
        QVERIFY(!(cacheUnit->flags & QV4::CompiledData::Unit::PendingTypeCompilation));
        QCOMPARE(uint(cacheUnit->sourceFileIndex), uint(0));
    }

    // Remove source code to make sure that when loading succeeds, it is because we loaded
    // the existing cache files.
    QVERIFY(QFile::remove(testFilePath));
    QVERIFY(QFile::remove(scriptFilePath));

    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl::fromLocalFile(testFilePath));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QCOMPARE(obj->property("value").toInt(), 42);
}

void tst_qmlcachegen::moduleScriptImport()
{
    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl("qrc:///data/jsmoduleimport.qml"));
    QVERIFY2(!component.isError(), qPrintable(component.errorString()));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QTRY_VERIFY(obj->property("ok").toBool());

    QVERIFY(QFile::exists(":/data/script.mjs"));
    QCOMPARE(QFileInfo(":/data/script.mjs").size(), 0);

    {
        auto componentPrivate = QQmlComponentPrivate::get(&component);
        QVERIFY(componentPrivate);
        auto compilationUnit = componentPrivate->compilationUnit->dependentScripts.first()->compilationUnit();
        QVERIFY(compilationUnit);
        auto unitData = compilationUnit->unitData();
        QVERIFY(unitData);
        QVERIFY(unitData->flags & QV4::CompiledData::Unit::StaticData);
        QVERIFY(unitData->flags & QV4::CompiledData::Unit::IsESModule);

        QQmlMetaType::CachedUnitLookupError error = QQmlMetaType::CachedUnitLookupError::NoError;
        const QV4::CompiledData::Unit *unitFromResources = QQmlMetaType::findCachedCompilationUnit(
                QUrl("qrc:/data/script.mjs"), &error);
        QVERIFY(unitFromResources);

        QCOMPARE(unitFromResources, compilationUnit->unitData());
    }
}

void tst_qmlcachegen::esModulesViaQJSEngine()
{
    QCOMPARE(QFileInfo(":/data/module.mjs").size(), 0);
    QJSEngine engine;
    QJSValue module = engine.importModule(":/data/module.mjs");
    QJSValue result = module.property("entry").call();
    QCOMPARE(result.toString(), "ok");
}

void tst_qmlcachegen::enums()
{
    QQmlEngine engine;
    CleanlyLoadingComponent component(&engine, QUrl("qrc:///data/Enums.qml"));
    QScopedPointer<QObject> obj(component.create());
    QVERIFY(!obj.isNull());
    QTRY_COMPARE(obj->property("value").toInt(), 200);
}

void tst_qmlcachegen::sourceFileIndices()
{
    QVERIFY(QFile::exists(":/data/versionchecks.qml"));
    QCOMPARE(QFileInfo(":/data/versionchecks.qml").size(), 0);

    QQmlMetaType::CachedUnitLookupError error = QQmlMetaType::CachedUnitLookupError::NoError;
    const QV4::CompiledData::Unit *unitFromResources = QQmlMetaType::findCachedCompilationUnit(
            QUrl("qrc:/data/versionchecks.qml"), &error);
    QVERIFY(unitFromResources);
    QVERIFY(unitFromResources->flags & QV4::CompiledData::Unit::PendingTypeCompilation);
    QCOMPARE(uint(unitFromResources->sourceFileIndex), uint(0));
}

void tst_qmlcachegen::reproducibleCache_data()
{
    QTest::addColumn<QString>("filePath");

    QDir dir(dataDirectory());
    for (const QString &entry : dir.entryList(QDir::Files)) {
        QVERIFY(entry.endsWith(".qml") || entry.endsWith(".js") || entry.endsWith(".mjs"));
        QTest::newRow(entry.toUtf8().constData()) << dir.filePath(entry);
    }
}

void tst_qmlcachegen::reproducibleCache()
{
    QFETCH(QString, filePath);

    QFile file(filePath);
    QVERIFY(file.exists());

    auto generate = [](const QString &path) {
        if (!generateCache(path))
            return QByteArray();
        QFile generated(path + 'c');
        [&](){ QVERIFY(generated.open(QIODevice::ReadOnly)); }();
        const QByteArray result = generated.readAll();
        generated.remove();
        return result;
    };

    const QByteArray contents1 = generate(file.fileName());
    const QByteArray contents2 = generate(file.fileName());
    QCOMPARE(contents1, contents2);
}

QTEST_GUILESS_MAIN(tst_qmlcachegen)

#include "tst_qmlcachegen.moc"
