Add UT for cotisation order

cotisations/test_views.py

@@ -125,9 +125,13 @@ class NewFactureTests(TestCase):
         self.assertEqual(response.status_code, 302)
         self.assertEqual(response.url, "/users/profil/%d" % self.user.pk)
         invoice = self.user.facture_set.first()
+        cotisations = invoice.get_subscription()
         delta = relativedelta(self.user.end_connexion(), date)
         delta.microseconds = 0
         self.assertEqual(delta, relativedelta(months=1, days=7))
+        # Check that the cotisations are sorted
+        self.assertEqual(relativedelta(cotisations[0].date_end_con, cotisations[0].date_start_con), relativedelta(months=1))
+        self.assertEqual(relativedelta(cotisations[1].date_end_con, cotisations[1].date_start_con), relativedelta(days=7))
 
     def test_several_articles_creates_several_purchases(self):
         data = {