public IEnumerator DraggingFromPortCreateGhostEdge()
{
var nodeModel = GraphModel.CreateNode <SingleOutputNodeModel>();
MarkGraphViewStateDirty();
yield return(null);
var portModel = nodeModel.Ports.First();
var port = portModel.GetUI <Port>(GraphView);
Assert.IsNotNull(port);
Assert.IsNull(port.EdgeConnector.edgeDragHelper.edgeCandidateModel);
var portConnector = port.SafeQ(PortConnectorPart.connectorUssName);
var clickPosition = portConnector.parent.LocalToWorld(portConnector.layout.center);
Vector2 move = new Vector2(0, 100);
EventHelper.DragToNoRelease(clickPosition, clickPosition + move);
yield return(null);
// edgeCandidateModel != null is the sign that we have a ghost edge
Assert.IsNotNull(port.EdgeConnector.edgeDragHelper.edgeCandidateModel);
EventHelper.MouseUpEvent(clickPosition + move);
yield return(null);
}
