public void Should_be_able_to_get_nearest_Norwegian_airport()
{
var home = new Location(63.433281, 10.419294);
Airport airport = service.GetNearestAirport(home);
Assert.AreEqual("TRD", airport.Code);
}
public void Can_get_the_distance_between_two_positions()
{
var posA = new Location(70.0, 24.0);
var posB = new Location(65, 15);
double distance = posA.DistanceTo(posB);
Assert.IsTrue(distance > 670);
}
public void Should_find_nearest_airport_if_user_selects_that_option()
{
var home = new Location(63.433281, 10.419294);
locationService.LocationToReturn = home;
Airport nearestAirport = null;
Messenger.Default.Register(this, (AirportSelectedMessage e) => nearestAirport = e.Content);
Messenger.Default.Send(new FindNearestAirportMessage());
EnqueueConditional(() => nearestAirport != null);
EnqueueCallback(() => Assert.AreEqual("TRD", nearestAirport.Code));
EnqueueTestComplete();
}
// Implementation of the Haversine Forumla (http://en.wikipedia.org/wiki/Haversine_formula)
public double DistanceTo(Location to)
{
double R = 6378.1; // radius of earth.
double dLat = ToRadian(to.Latitude - Latitude);
double dLon = ToRadian(to.Longitude - Longitude);
double a =
Math.Sin(dLat/2.0)*Math.Sin(dLat/2.0) +
Math.Cos(ToRadian(Latitude))*Math.Cos(ToRadian(to.Latitude))*
Math.Sin(dLon/2.0)*Math.Sin(dLon/2.0);
double c = 2.0*Math.Asin(Math.Min(1, Math.Sqrt(a)));
double d = R*c;
return d;
}
public Airport GetNearestAirport(Location home)
{
double shortestDistance = Double.MaxValue;
Airport nearest = null;
foreach(var airport in GetNorwegianAirports())
{
var distanceToAirport = airport.DistanceFrom(home);
if(shortestDistance > distanceToAirport)
{
shortestDistance = distanceToAirport;
nearest = airport;
}
}
return nearest;
}
public PresetLocationService(double latitude, double longitude)
{
_currentLocation = new Location(latitude, longitude);
}