test updates to take into account exception management

tests/fixtures/product_fixtures.py

@@ -106,3 +106,18 @@ def create_unique_product_factory():
 def product_factory():
     """Fixture that provides a product factory function"""
     return create_unique_product_factory()
+
+
+@pytest.fixture
+def test_product_with_stock(db, test_product, test_stock):
+    """Product with associated stock record."""
+    # Ensure they're linked by GTIN
+    if test_product.gtin != test_stock.gtin:
+        test_stock.gtin = test_product.gtin
+        db.commit()
+        db.refresh(test_stock)
+
+    return {
+        'product': test_product,
+        'stock': test_stock
+    }