public void TestHoldValue()
{
UnitCartesian test = new UnitCartesian(2.0, 3.0, 6.0);
Assert.AreEqual(2.0 / 7.0, test.X);
Assert.AreEqual(3.0 / 7.0, test.Y);
Assert.AreEqual(6.0 / 7.0, test.Z);
}