public void Concatenation_with_the_multiply_operator()
{
var quat1 = new Quaternion(Vector3.ZAxis, Constants.HALF_PI);
var quat2 = new Quaternion(Vector3.XAxis, Constants.HALF_PI);
var concatenated = quat2 * quat1;
concatenated.X.ShouldEqual(0.2580212f, Constants.DELTA);
concatenated.Y.ShouldEqual(-0.2580212f, Constants.DELTA);
concatenated.Z.ShouldEqual(0.2580212f, Constants.DELTA);
concatenated.W.ShouldEqual(0.9689124f, Constants.DELTA);
}