[FIX] stock_move_line_devaluation: fix return wizard quantity in tests

Author: marcos-mendez

stock_move_line_devaluation/tests/test_stock_move_line_devaluation.py

@@ -8,7 +8,7 @@ def setUpClass(cls):
         super().setUpClass()
 
         cls.partner = cls.env["res.partner"].create(
-            {"name": "Test Devaluation Customer", "customer_rank": 1}
+            {"name": "Test Devaluation Customer"}
         )
         cls.pricelist = cls.env["product.pricelist"].create(
             {"name": "Test Devaluation Pricelist"}
@@ -26,7 +26,6 @@ def setUpClass(cls):
         cls.stock_location = cls.env.ref("stock.stock_location_stock")
         cls.customer_location = cls.env.ref("stock.stock_location_customers")
         cls.picking_type_out = cls.env.ref("stock.picking_type_out")
-        cls.picking_type_in = cls.env.ref("stock.picking_type_in")
         cls.uom_unit = cls.env.ref("uom.product_uom_unit")
 
         # Ensure stock availability
@@ -68,18 +67,21 @@ def _create_outgoing_picking(self, qty=5.0):
 
     def _create_return(self, picking, qty):
         """Create a return for a picking using the stock return wizard."""
+        wizard_ctx = {
+            "active_id": picking.id,
+            "active_ids": picking.ids,
+            "active_model": "stock.picking",
+        }
         return_wizard = (
-            self.env["stock.return.picking"]
-            .with_context(active_id=picking.id, active_model="stock.picking")
-            .create({})
+            self.env["stock.return.picking"].with_context(**wizard_ctx).create({})
         )
         for line in return_wizard.product_return_moves:
-            if line.product_id == self.product:
-                line.quantity = qty
+            line.write({"quantity": qty})
         result = return_wizard.create_returns()
         return_picking = self.env["stock.picking"].browse(result["res_id"])
+        return_picking.action_assign()
         for ml in return_picking.move_line_ids:
-            ml.qty_done = qty
+            ml.qty_done = ml.reserved_uom_qty or qty
         return_picking._action_done()
         return return_picking