public void SetMediaElement ()
{
MediaElement media = new MediaElement ();
VideoBrush brush = new VideoBrush ();
object retval;
brush.SourceName = "iTube";
media.Name = "YouTube";
brush.SetSource (media);
Assert.AreEqual (String.Empty, brush.SourceName, "SourceName after SetSource");
// since String.Empty is the default value, we also have to check RLV
retval = brush.ReadLocalValue (VideoBrush.SourceNameProperty);
Assert.AreNotEqual (DependencyProperty.UnsetValue, retval, "SourceName is not cleared after SetSource");
}