[IMP] add test to ensure onchange playing to not do any mess

See PR #40
sale_configurator_option was adding default option ids when calling product_option_id
this was doing a huge mess when the user log in (option was convert to normal line)
the fix is done their but by security we keep a test here

shopinvader_sale_configurator_option/tests/test_cart.py

@@ -47,3 +47,18 @@ def test_update_option_action_replace(self):
         options = res["data"]["lines"]["items"][0]["options"]
         self.assertEqual(len(options), 1)
         self.assertEqual(options[0]["qty"], 3)
+
+    def test_anonymous_cart_then_sign(self):
+        res = self.service.dispatch("add_item", params=self.item_params)
+        self.assertEqual(len(res["data"]["lines"]["items"]), 1)
+        options = res["data"]["lines"]["items"][0]["options"]
+        self.assertEqual(len(options), 2)
+        self.assertEqual(options[0]["option"]["product"]["name"], "Option 1")
+        self.assertEqual(options[1]["option"]["product"]["name"], "Option 2")
+        invader_partner = self.env.ref("shopinvader.shopinvader_partner_1")
+        cart = self.env["sale.order"].browse(res["data"]["id"])
+        self.shopinvader_session["cart_id"] = cart.id
+        self.service._load_partner_work_context(invader_partner, force=True)
+        service_sign = self.service.component("customer")
+        res = service_sign.sign_in()
+        self.assertEqual(len(cart.main_line_ids), 1)