How to simulate mouse wheel events using QTestLib [Qt5]

I am happily using QTestLib to write tests for my Qt5 widgets based UI. There has seemed to be no shortage of features and convenience functionality until now, when I tried to find a way to simulate mouse wheel events.

I have looked at the official documentation, and an official example but I can't seem to figure out how to go about simulating mouse wheel events.

Does this not exist? Or am I missing something? How should I create dummy mouse wheel events using QTestLib?

For anyone stumbling into this problem 10 years from now on. We wrote an implementation for our testing suite for Qt4.8 (also tested in Qt5.6, as always no guarantees):

void TestUtility::mouseWheelTurn(
    QWidget *widget, // The most top level widget; a MainWindow in our case
    int delta,       // As in QWheelEvent
    QPoint pos,      // Mouseposition in the moment of scrolling relative to top level widget
    Qt::MouseButtons buttons, // As in QWheelEvent
    Qt::KeyboardModifiers modifiers, // As in QWheelEvent
    Qt::Orientation orientation, // As in QWheelEvent
    int delay)       // As in other QTest functions
{
    QWidget *toWheelChild = widget->childAt(pos);

    if(toWheelChild == NULL) return;

    pos = widget->mapToGlobal(pos);
    pos = toWheelChild->mapFromGlobal(pos);

    QTest::mouseMove(toWheelChild, pos);

    QTest::qWait(delay);
    QWheelEvent *wheelEvent = 
        new QWheelEvent(pos, delta, buttons, modifiers, orientation);
    QApplication::instance()->postEvent(toWheelChild, wheelEvent);
}