def test_previous_leg_of_route_does_not_exist(self):
distance = Distance(10)
time = Time(20)
sdt = SpeedDistanceTime(distance=distance, time=time)
latitude = Coordinate(56, 42, 10, "N")
longitude = Coordinate(2, 5, 19, "W")
waypoint = Waypoint(latitude, longitude)
bearing = CompassBearing(190)
leg = Leg(sdt, waypoint, bearing)
legs = [leg]
route = Route(legs)
self.assertIsInstance(route, Route)
with self.assertRaises(IndexError):
route.previous_leg(2)
def test_previous_leg(self):
distance = Distance(10)
time = Time(20)
sdt = SpeedDistanceTime(distance=distance, time=time)
latitude = Coordinate(56, 42, 10, "N")
longitude = Coordinate(2, 5, 19, "W")
waypoint = Waypoint(latitude, longitude)
bearing = CompassBearing(190)
leg = Leg(sdt, waypoint, bearing)
leg2 = Leg(sdt, waypoint, bearing)
legs = [leg, leg2]
route = Route(legs)
self.assertIsInstance(route, Route)
self.assertEqual(route.previous_leg(1), leg)