Marketplace tests update

app/services/stock_service.py

@@ -10,7 +10,7 @@ This module provides classes and functions for:
 """
 
 import logging
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import List, Optional
 
 from sqlalchemy.orm import Session
@@ -68,7 +68,7 @@ class StockService:
                 # Update existing stock (SET to exact quantity)
                 old_quantity = existing_stock.quantity
                 existing_stock.quantity = stock_data.quantity
-                existing_stock.updated_at = datetime.utcnow()
+                existing_stock.updated_at = datetime.now(timezone.utc)
                 db.commit()
                 db.refresh(existing_stock)
 
@@ -128,7 +128,7 @@ class StockService:
                 # Add to existing stock
                 old_quantity = existing_stock.quantity
                 existing_stock.quantity += stock_data.quantity
-                existing_stock.updated_at = datetime.utcnow()
+                existing_stock.updated_at = datetime.now(timezone.utc)
                 db.commit()
                 db.refresh(existing_stock)
 
@@ -207,7 +207,7 @@ class StockService:
                 raise NegativeStockException(normalized_gtin, location, new_quantity)
 
             existing_stock.quantity = new_quantity
-            existing_stock.updated_at = datetime.utcnow()
+            existing_stock.updated_at = datetime.now(timezone.utc)
             db.commit()
             db.refresh(existing_stock)
 
@@ -381,7 +381,7 @@ class StockService:
             self._validate_quantity(stock_update.quantity, allow_zero=True)
 
             stock_entry.quantity = stock_update.quantity
-            stock_entry.updated_at = datetime.utcnow()
+            stock_entry.updated_at = datetime.now(timezone.utc)
             db.commit()
             db.refresh(stock_entry)