[FIX] - include date_end in the period if the product is_autorenew

product_contract/models/sale_order_line.py

@@ -79,6 +79,7 @@ class SaleOrderLine(models.Model):
                             rec.product_id.auto_renew_rule_type,
                             rec.product_id.auto_renew_interval,
                         )
+                        - relativedelta(days=1)
                     )
 
     @api.onchange('date_start')
@@ -88,12 +89,16 @@ class SaleOrderLine(models.Model):
                 if not rec.date_start:
                     rec.date_end = False
                 else:
-                    rec.date_end = rec.date_start + self.env[
+                    rec.date_end = (
+                        rec.date_start
+                        + self.env[
                             'account.analytic.invoice.line'
                         ].get_relative_delta(
                             rec.product_id.auto_renew_rule_type,
                             rec.product_id.auto_renew_interval,
                         )
+                        - relativedelta(days=1)
+                    )
 
     @api.multi
     def _prepare_contract_line_values(self, contract):

product_contract/tests/test_sale_order.py

@@ -129,7 +129,7 @@ class TestSaleOrder(TransactionCase):
             self.order_line1.recurring_invoicing_type,
             self.product1.recurring_invoicing_type,
         )
-        self.assertEqual(self.order_line1.date_end, Date.to_date('2019-01-01'))
+        self.assertEqual(self.order_line1.date_end, Date.to_date('2018-12-31'))
 
     def test_check_contract_sale_partner(self):
         """Can't link order line to a partner contract different then the