def test_stations_within_radius():
    centre = (52.2053, 0.1218)
    assert (geo.stations_within_radius(stations, centre, 0) == [])
    assert (len(geo.stations_within_radius(stations, centre, 10000)) == len(stations))
def test_stations_within_radius():
    centre = (52.2053, 0.1218)
    assert (geo.stations_within_radius(stations, centre, 0) == [])
    assert (len(geo.stations_within_radius(stations, centre, 10000)) == len(stations))