public void CompatibleTest()
{
Unit u1 = new Unit("kilogram", "kg", SIUnit.SIUnitTypes.Mass);
Unit u2 = new Unit("gram", "g", SIUnit.SIUnitTypes.Mass);
Assert.IsTrue(u1.IsCompatibleTo(u1));
Assert.IsTrue(u1.IsCompatibleTo(u2));
Assert.IsTrue(u2.IsCompatibleTo(u1));
}