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);
}