[FIX] website_sale_aplicoop: align pricing and drafts

website_sale_aplicoop/tests/test_save_order_endpoints.py

@@ -16,6 +16,8 @@ from datetime import timedelta
 
 from odoo.tests.common import TransactionCase
 
+from ..controllers.website_sale import AplicoopWebsiteSale
+
 
 class TestSaveOrderEndpoints(TransactionCase):
     """Test suite for order-saving endpoints."""
@@ -94,6 +96,51 @@ class TestSaveOrderEndpoints(TransactionCase):
         # Associate product with group order
         self.group_order.product_ids = [(4, self.product.id)]
 
+        # Helper: controller instance for pure helpers
+        self.controller = AplicoopWebsiteSale()
+
+    def _build_line(self, product, qty, price):
+        return (
+            0,
+            0,
+            {"product_id": product.id, "product_uom_qty": qty, "price_unit": price},
+        )
+
+    def test_merge_or_replace_replaces_existing_draft(self):
+        """Existing draft must be replaced (not merged) with new lines."""
+
+        # Existing draft with one line
+        existing = self.env["sale.order"].create(
+            {
+                "partner_id": self.member_partner.id,
+                "group_order_id": self.group_order.id,
+                "pickup_day": self.group_order.pickup_day,
+                "pickup_date": self.group_order.pickup_date,
+                "home_delivery": self.group_order.home_delivery,
+                "order_line": [self._build_line(self.product, 1, 10.0)],
+                "state": "draft",
+            }
+        )
+
+        new_lines = [self._build_line(self.product, 3, 99.0)]
+
+        result = self.controller._merge_or_replace_draft(
+            self.group_order,
+            self.user,
+            new_lines,
+            existing,
+            self.group_order.id,
+        )
+
+        self.assertEqual(result.id, existing.id, "Should reuse existing draft")
+        self.assertEqual(len(result.order_line), 1, "Only one line should remain")
+        self.assertEqual(
+            result.order_line[0].product_uom_qty, 3, "Quantity must be replaced"
+        )
+        self.assertEqual(
+            result.order_line[0].price_unit, 99.0, "Price must be replaced"
+        )
+
     def test_save_eskaera_draft_creates_order_with_group_order_id(self):
         """
         Test that save_eskaera_draft() creates a sale.order with group_order_id.