public void ByLoftingCurveReferences_ValidArgs()
{
IEnumerable <ElementCurveReference> eles =
ElementSelector.ByType <Autodesk.Revit.DB.CurveElement>(true)
.Cast <ModelCurve>()
.Select(x => x.ElementCurveReference);
Assert.AreEqual(2, eles.Count());
var loft = Form.ByLoftingCurveReferences(eles.ToArray(), false);
Assert.NotNull(loft);
Assert.IsTrue(DocumentManager.Instance.ElementExistsInDocument(
new ElementUUID(loft.InternalElement.UniqueId)));
}