public void Should_CalculatePoint_ForLinearFullStep() { var step = 1.0; var interpolator = new Linear( new Vector3d(0, 0, 0), new Vector3d(1, 1, 1) ); var p = interpolator.PositionAt(step); Assert.AreEqual(new Vector3d(1.0, 1.0, 1.0), p); }