public void RenderQuantity()
{
var q = new Quantity();
q.Value = 4.5m;
q.Code = "kg";
q.System = "http://unitsofmeasure.org";
Assert.AreEqual("4.5kg", q.ForDisplay());
q.Units = "kilo";
Assert.AreEqual("4.5 kilo", q.ForDisplay());
q.Comparator = Quantity.QuantityCompararator.LessOrEqual;
Assert.AreEqual("<=4.5 kilo", q.ForDisplay());
}