public void TestGetHashCode()
{
Cartesian object1 = new Cartesian(1.0, 2.0, 3.0);
Cartesian object2 = new Cartesian(1.0, 2.0, 3.0);
Cartesian object3 = new Cartesian(1.0, 2.0, 3.1);
Assert.AreEqual(object1.GetHashCode(), object2.GetHashCode());
Assert.AreNotEqual(object1.GetHashCode(), object3.GetHashCode());
}