fee mode rate sale side

modules/purchase_trade/tests/test_module.py

@@ -273,6 +273,35 @@ class PurchaseTradeTestCase(ModuleTestCase):
 
             self.assertEqual(fee.get_amount(), Decimal('13.33'))
 
+    def test_sale_rate_fee_amount_uses_bl_date_estimate(self):
+        'sale rate fee amount uses BL estimated date plus financing delta'
+        Fee = Pool().get('fee.fee')
+        fee = Fee()
+        fee.mode = 'rate'
+        fee.price = Decimal('12')
+        fee.fee_date = datetime.date(2026, 4, 23)
+        fee.quantity = Decimal('10')
+        fee.unit = Mock()
+        fee.shipment_in = None
+        fee.line = None
+        fee.sale_line = Mock(
+            unit_price=Decimal('100'),
+            lots=[],
+            estimated_date=[
+                Mock(
+                    trigger='bldate',
+                    estimated_date=datetime.date(2026, 5, 23),
+                    fin_int_delta=10,
+                ),
+            ],
+        )
+
+        with patch('trytond.modules.purchase_trade.fee.Pool') as PoolMock:
+            PoolMock.return_value.get.return_value = Mock(
+                today=Mock(return_value=datetime.date(2026, 4, 23)))
+
+            self.assertEqual(fee.get_amount(), Decimal('13.33'))
+
     def test_create_pnl_price_from_line_keeps_finished_physical_sale_line(self):
         'purchase valuation keeps finished sale-side pnl on physical lots'
         Valuation = Pool().get('valuation.valuation')