public void ApproximateVelocityTest()
{
DateTime dtg = DateTime.Now;
Observation target = new Observation {
DateTime = dtg, X = 1, Y = 1, Z = 1
};
Observation pastObservation = new Observation {
DateTime = dtg.AddSeconds(3), X = 0, Y = 1, Z = 2
};
Velocity expected = new Velocity {
DateTime = dtg, X = (-1F / 3F), Y = 0, Z = (1F / 3F)
};
Velocity actual;
actual = target.ApproximateVelocity(pastObservation);
Assert.IsTrue(Math.Abs(actual.X - expected.X) < 0.0001);
Assert.IsTrue(Math.Abs(actual.Y - expected.Y) < 0.0001);
Assert.IsTrue(Math.Abs(actual.Z - expected.Z) < 0.0001);
}