feat: red flush and cost

business/tests/test_red_flush_services.py

@@ -146,6 +146,37 @@ class BusinessRedFlushServiceTestCase(TestCase):
             red_flush_id=flushed.red_flush_id,
         )
 
+    def test_red_flush_sales_order_without_stock_reverses_balance_only(self):
+        merchant, customer, _, warehouse, _, product, operator = create_sales_fixtures()
+        self._disable_auto_stock_tasks(merchant)
+        order = services.create_sales_order(
+            merchant=merchant,
+            customer=customer,
+            order_date=timezone.now().date(),
+            warehouse=warehouse,
+            operator=operator,
+            items=[{'product_id': product.id, 'quantity': 20, 'num_of_rolls': 1, 'price': '15'}],
+        )
+        services.review_sales_order(
+            sales_order=order,
+            target_status=business_models.SalesOrderStatusEnum.APPROVED,
+            reviewed_by=self.user,
+        )
+
+        flushed = services.red_flush_sales_order(merchant=merchant, sales_order=order, red_flushed_by=self.user)
+
+        self.assertTrue(flushed.is_red_flushed)
+        balance = business_models.CustomerBalance.objects.get(merchant=merchant, customer=customer)
+        self.assertEqual(balance.balance, Decimal('0.00'))
+        self._assert_balance_red_flushed(
+            source_type=business_models.BalanceChangeSourceEnum.SALES_ORDER,
+            source_id=order.id,
+            red_flush_id=flushed.red_flush_id,
+        )
+        self.assertFalse(
+            stock_models.StockChangeRecord.objects.filter(red_flush_id=flushed.red_flush_id).exists()
+        )
+
     def test_red_flush_purchase_return_order_reverses_balance_and_stock(self):
         merchant, supplier, _, warehouse, product, operator = create_basic_fixtures()
         self._disable_auto_stock_tasks(merchant)