public void TestFromCartesian()
{
UnitCartesian test = new UnitCartesian(new Cartesian(2.0, 3.0, 6.0));
Assert.AreEqual(2.0 / 7.0, test.X, Constants.Epsilon15);
Assert.AreEqual(3.0 / 7.0, test.Y, Constants.Epsilon15);
Assert.AreEqual(6.0 / 7.0, test.Z, Constants.Epsilon15);
}