public void Test_CalculateVolocity()
        {
            //arrange
            DateTime oldDateTime =
                DateTime.ParseExact("20151006213456789", "yyyyMMddHHmmssfff", CultureInfo.InvariantCulture);

            DateTime newDateTime =
                DateTime.ParseExact("20151006213459789", "yyyyMMddHHmmssfff", CultureInfo.InvariantCulture);
            //act
            double velocity = _uut.CalculateVolocity(5, 10, 4, 6, oldDateTime, newDateTime);

            //assert
            Assert.That(velocity, Is.EqualTo(1.7950549357115013438));
        }