@Test
public void testDistanceSydneyMelbourne() {

    double[] sydney = service.getCoordinates(SYDNEY_IP);
    double[] melbourne = service.getCoordinates(MELBOURNE_IP);
    double distanceSydneyToMelbourneKM = service.distance(sydney, melbourne) / 1000;
    double distanceMelbourneToSydneyKM = service.distance(melbourne, sydney) / 1000;
    assertEquals(DISTANCE_SYDNEY_MELBOURNE_KM, distanceSydneyToMelbourneKM, DISTANCE_COMPARISON_DELTA_KM);
    assertEquals(DISTANCE_SYDNEY_MELBOURNE_KM, distanceMelbourneToSydneyKM, DISTANCE_COMPARISON_DELTA_KM);
}