old_contents: import unittest
  from mock import Mock
  from cartodb_services.mapbox.true_isolines import MapboxTrueIsolines, DEFAULT_PROFILE
  from cartodb_services.tools import Coordinate
  
  from credentials import mapbox_api_key
  
  VALID_ORIGIN = Coordinate(-73.989, 40.733)
  
  
  class MapboxTrueIsolinesTestCase(unittest.TestCase):
  
      def setUp(self):
          self.mapbox_isolines = MapboxTrueIsolines(apikey=mapbox_api_key(),
                                                    logger=Mock())
  
      def test_calculate_isochrone(self):
          time_ranges = [300, 900]
          solution = self.mapbox_isolines.calculate_isochrone(
              origin=VALID_ORIGIN,
              profile=DEFAULT_PROFILE,
              time_ranges=time_ranges)
  
          assert solution
  
      def test_calculate_isodistance(self):
          distance_range = 10000
          solution = self.mapbox_isolines.calculate_isodistance(
              origin=VALID_ORIGIN,
              profile=DEFAULT_PROFILE,
              distance_range=distance_range)
  
          assert solution
  
new_contents: import unittest
  from mock import Mock
  from cartodb_services.mapbox.true_isolines import MapboxTrueIsolines, DEFAULT_PROFILE
  from cartodb_services.tools import Coordinate
  
  from credentials import mapbox_api_key
  
  VALID_ORIGIN = Coordinate(-73.989, 40.733)
  
  
  class MapboxTrueIsolinesTestCase(unittest.TestCase):
  
      def setUp(self):
          self.mapbox_isolines = MapboxTrueIsolines(apikey=mapbox_api_key(),
                                                    logger=Mock())
  
      def test_invalid_time_range(self):
          time_ranges = [4000]
  
          with self.assertRaises(ValueError):
              solution = self.mapbox_isolines.calculate_isochrone(
                  origin=VALID_ORIGIN,
                  profile=DEFAULT_PROFILE,
                  time_ranges=time_ranges)
  
      def test_calculate_isochrone(self):
          time_ranges = [300, 900]
          solution = self.mapbox_isolines.calculate_isochrone(
              origin=VALID_ORIGIN,
              profile=DEFAULT_PROFILE,
              time_ranges=time_ranges)
  
          assert solution
  
      def test_calculate_isodistance(self):
          distance_range = 10000
          solution = self.mapbox_isolines.calculate_isodistance(
              origin=VALID_ORIGIN,
              profile=DEFAULT_PROFILE,
              distance_range=distance_range)
  
          assert solution
  
subject: Add test to validate time ranges