def test_days_between_dates(self):
     self.assertEqual(
         ManoloBaseSpider.days_between_dates('2015-08-20', '2015-08-30'),
         10)
     self.assertEqual(
         ManoloBaseSpider.days_between_dates('2015-08-30', '2015-08-20'),
         -10)
     self.assertEqual(
         ManoloBaseSpider.days_between_dates('2015-08-30', '2015-08-30'), 0)
 def test_days_between_dates(self):
     self.assertEqual(ManoloBaseSpider.days_between_dates('2015-08-20', '2015-08-30'), 10)
     self.assertEqual(ManoloBaseSpider.days_between_dates('2015-08-30', '2015-08-20'), -10)
     self.assertEqual(ManoloBaseSpider.days_between_dates('2015-08-30', '2015-08-30'), 0)