How to fake QWheelEvent for tests?

Question

I need to make a test with googletest a function:

void SomeClass::changeSomething(QWheelEvent *event)
{    
    if (event->delta() > 0)
    {
        _data += _increment;
    }
    else
    {
       _data -= _increment;
    }    
}

How do I fake this event in order to pass the test?