public void TestNegation() { UnitQuaternion u = -new UnitQuaternion(2.0, 4.0, 7.0, 10.0); Assert.AreEqual(-2.0 / 13.0, u.W); Assert.AreEqual(-4.0 / 13.0, u.X); Assert.AreEqual(-7.0 / 13.0, u.Y); Assert.AreEqual(-10.0 / 13.0, u.Z); }