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#include <QtTest>
#include <QtQuick>

typedef QPair<QString, QString> QStringPair;

class tst_Snippets : public QObject
{
    Q_OBJECT

private slots:
    void initTestCase();

    void screenshots();
    void screenshots_data();

private:
    QQuickView view;
    QMap<QString, QStringPair> filePaths;
};

void tst_Snippets::initTestCase()
{
    QDir outdir(QDir::current().filePath("screenshots"));
    QVERIFY(outdir.exists() || QDir::current().mkpath("screenshots"));

    QString datadir = QFINDTESTDATA("data");
    QVERIFY(!datadir.isEmpty());

    qInfo() << datadir;

    QDirIterator it(datadir, QStringList() << "*.qml", QDir::Files | QDir::Readable, QDirIterator::Subdirectories);
    while (it.hasNext()) {
        QFileInfo fi(it.next());
        filePaths.insert(fi.baseName(), qMakePair(fi.filePath(), outdir.filePath(fi.baseName() + ".png")));
    }
    QVERIFY(!filePaths.isEmpty());
}

void tst_Snippets::screenshots()
{
    QFETCH(QString, input);
    QFETCH(QString, output);

    view.setSource(QUrl::fromLocalFile(input));
    QVERIFY(view.rootObject());

    view.show();
    view.requestActivate();
    QVERIFY(QTest::qWaitForWindowActive(&view));

    QSharedPointer<QQuickItemGrabResult> result = view.rootObject()->grabToImage();
    QSignalSpy spy(result.data(), SIGNAL(ready()));
    QVERIFY(spy.isValid());
    QVERIFY(spy.wait());
    QVERIFY(result->saveToFile(output));
}

void tst_Snippets::screenshots_data()
{
    QTest::addColumn<QString>("input");
    QTest::addColumn<QString>("output");

    QMap<QString, QStringPair>::const_iterator it;
    for (it = filePaths.constBegin(); it != filePaths.constEnd(); ++it)
        QTest::newRow(qPrintable(it.key())) << it.value().first << it.value().second;
}

QTEST_MAIN(tst_Snippets)

#include "tst_snippets.moc"