public void AirplaneDirection(string plane1Tag, int plane1X, int plane1Y, int plane1Alitude, string plane1Timestamp,
string plane2Tag, int plane2X, int plane2Y, int plane2Alitude, string plane2Timestamp, double expected)
{
string format = "yyyyMMddHHmmssfff";
DateTime plane1Time = DateTime.ParseExact(plane1Timestamp, format, CultureInfo.InvariantCulture);
DateTime plane2Time = DateTime.ParseExact(plane2Timestamp, format, CultureInfo.InvariantCulture);
var airplanePing1 = new Airplane(plane1Tag, plane1X, plane1Y, plane1Alitude, plane1Time);
var airplanePing2 = new Airplane(plane2Tag, plane2X, plane2Y, plane2Alitude, plane2Time);
//Create list of Airplanes
List <Airplane> airplanesList = new List <Airplane>();
airplanesList.Add(airplanePing1);
//Unit under test/uut
Calculator calculator = new Calculator(airplanesList);
var actual = calculator.GetDirection(airplanePing2);
Assert.AreEqual(actual, expected);
}