Adapt billing tests to product activation structure

uncloud_django_based/uncloud/uncloud_pay/models.py

@@ -481,7 +481,7 @@ class Order(models.Model):
     # Trigger initial bill generation at order creation.
     def save(self, *args, **kwargs):
         super(Order, self).save(*args, **kwargs)
-        Bill.generate_for(timezone.now().year, timezone.now().month, self.owner)
+        Bill.generate_for(self.starting_date.year, self.starting_date.month, self.owner)
 
     @property
     def records(self):
@@ -496,6 +496,10 @@ class Order(models.Model):
         return reduce(lambda acc, record: acc + record.recurring_price, self.records, 0)
 
     # Used by uncloud_pay tests.
+    @property
+    def bills(self):
+        return Bill.objects.filter(order=self)
+
     def add_record(self, one_time_price, recurring_price, description):
       OrderRecord.objects.create(order=self,
               one_time_price=one_time_price,

uncloud_django_based/uncloud/uncloud_pay/tests.py

@@ -31,7 +31,7 @@ class BillingTestCase(TestCase):
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first month: full recurring_price + setup.
-        first_month_bills = Bill.generate_for(2020, 3, self.user)
+        first_month_bills = order.bills # Initial bill generated at order creation.
         self.assertEqual(len(first_month_bills), 1)
         self.assertEqual(first_month_bills[0].total, one_time_price + recurring_price)
 
@@ -65,7 +65,7 @@ class BillingTestCase(TestCase):
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first year: recurring_price + setup.
-        first_year_bills = Bill.generate_for(2020, 3, self.user)
+        first_year_bills = order.bills # Initial bill generated at order creation.
         self.assertEqual(len(first_year_bills), 1)
         self.assertEqual(first_year_bills[0].starting_date.date(),
                 date.fromisoformat('2020-03-31'))
@@ -106,7 +106,7 @@ class BillingTestCase(TestCase):
         order.add_record(one_time_price, recurring_price, description)
 
         # Generate & check bill for first month: recurring_price + setup.
-        first_month_bills = Bill.generate_for(2020, 3, self.user)
+        first_month_bills = order.bills
         self.assertEqual(len(first_month_bills), 1)
         self.assertEqual(float(first_month_bills[0].total),
                 round(16 * recurring_price, AMOUNT_DECIMALS) + one_time_price)