[FIX] delivery: add test for delivery w/carrier when no linked sale order flow

This commit adds a test to a fix done in https://github.com/odoo/odoo/commit/afed7db30042e2ea91cdae292dadb7b6f742e33d



bug introduced during: odoo/odoo#109298
opw-3162826

closes odoo/odoo#111440

Signed-off-by: Tiffany Chang <tic@odoo.com>

addons/delivery/tests/test_packing_delivery.py

@@ -76,3 +76,31 @@ class TestPacking(TestPackingCommon):
         # default weight was set.
         pack_wiz = self.env['choose.delivery.package'].with_context(pack_action_ctx).create({})
         self.assertEqual(pack_wiz.shipping_weight, 13.5)
+
+    def test_send_to_shipper_without_sale_order(self):
+        """
+            Check we can validate delivery with a delivery carrier set when it isn't linked to a sale order
+        """
+        self.env['stock.quant']._update_available_quantity(self.product_aw, self.stock_location, 20.0)
+
+        picking_ship = self.env['stock.picking'].create({
+            'partner_id': self.env['res.partner'].create({'name': 'A partner'}).id,
+            'picking_type_id': self.warehouse.out_type_id.id,
+            'location_id': self.stock_location.id,
+            'location_dest_id': self.customer_location.id,
+            'carrier_id': self.test_carrier.id
+        })
+        self.env['stock.move.line'].create({
+            'product_id': self.product_aw.id,
+            'product_uom_id': self.uom_kg.id,
+            'picking_id': picking_ship.id,
+            'qty_done': 5,
+            'location_id': self.stock_location.id,
+            'location_dest_id': self.customer_location.id
+        })
+
+        self.assertEqual(picking_ship.state, 'draft', 'Delivery state should be draft.')
+        self.assertFalse(picking_ship.sale_id.id, 'Sale order shouldn\'t be set')
+        picking_ship.action_confirm()
+        picking_ship.button_validate()
+        self.assertEqual(picking_ship.state, 'done')