From 367dcba68f7cf58c3a23c09d33a1a31ee899a637 Mon Sep 17 00:00:00 2001
From: Santiago Palenque <santipalenque@gmail.com>
Date: Thu, 17 Sep 2026 17:07:34 -0300
Subject: [PATCH] chore: fix bug and add tests

---
 .../sponsor-page-cart-list-reducer.test.js    | 93 +++++++++++++++++++
 .../sponsor-page-cart-list-reducer.js         | 10 +-
 2 files changed, 94 insertions(+), 9 deletions(-)
 create mode 100644 src/reducers/sponsors/__tests__/sponsor-page-cart-list-reducer.test.js

diff --git a/src/reducers/sponsors/__tests__/sponsor-page-cart-list-reducer.test.js b/src/reducers/sponsors/__tests__/sponsor-page-cart-list-reducer.test.js
new file mode 100644
index 000000000..c0b18327a
--- /dev/null
+++ b/src/reducers/sponsors/__tests__/sponsor-page-cart-list-reducer.test.js
@@ -0,0 +1,93 @@
+/**
+ * Copyright 2019 OpenStack Foundation
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * */
+
+import sponsorPageCartListReducer from "../sponsor-page-cart-list-reducer";
+import { RECEIVE_CART_FORM } from "../../../actions/sponsor-cart-actions";
+
+const DEFAULT_STATE = {
+  cart: null,
+  term: "",
+  summitTZ: "",
+  availableForms: {
+    forms: [],
+    lastPage: 1,
+    total: 0,
+    currentPage: 1,
+    term: "",
+    order: "id",
+    orderDir: 1
+  },
+  sponsorForm: null,
+  cartForm: null,
+  paymentProfile: null,
+  paymentIntent: null,
+  offlinePayment: null,
+  cartOwner: null
+};
+
+describe("sponsorPageCartListReducer", () => {
+  describe("RECEIVE_CART_FORM", () => {
+    it("populates every item field from the response, unmodified (cart form edit)", () => {
+      const item = {
+        form_item_id: 10,
+        name: "Item A",
+        notes: "some notes from the server",
+        quantity: 2,
+        default_quantity: 1,
+        is_sold_out: false,
+        remaining_quantity_sponsor: 5,
+        meta_fields: [{ type_id: 1, class_field: "global", type: "Text" }]
+      };
+
+      const result = sponsorPageCartListReducer(DEFAULT_STATE, {
+        type: RECEIVE_CART_FORM,
+        payload: {
+          response: {
+            id: 1,
+            name: "Form 1",
+            items: [item]
+          }
+        }
+      });
+
+      expect(result.cartForm.items[0]).toEqual(item);
+    });
+
+    it("does not remap notes from a non-existent user_notes field", () => {
+      const item = { form_item_id: 10, notes: "keep me", quantity: 1 };
+
+      const result = sponsorPageCartListReducer(DEFAULT_STATE, {
+        type: RECEIVE_CART_FORM,
+        payload: {
+          response: { id: 1, items: [item] }
+        }
+      });
+
+      // Regression: an earlier version of this reducer overwrote notes with
+      // `item.user_notes || ""`, which is always "" since items never carry
+      // a user_notes field - silently blanking real notes on cart form edit.
+      expect(result.cartForm.items[0].notes).toBe("keep me");
+    });
+
+    it("stores the response as-is when there are no items", () => {
+      const result = sponsorPageCartListReducer(DEFAULT_STATE, {
+        type: RECEIVE_CART_FORM,
+        payload: {
+          response: { id: 1, items: [] }
+        }
+      });
+
+      expect(result.cartForm).toEqual({ id: 1, items: [] });
+    });
+  });
+});
diff --git a/src/reducers/sponsors/sponsor-page-cart-list-reducer.js b/src/reducers/sponsors/sponsor-page-cart-list-reducer.js
index 19c795de7..f9636e517 100644
--- a/src/reducers/sponsors/sponsor-page-cart-list-reducer.js
+++ b/src/reducers/sponsors/sponsor-page-cart-list-reducer.js
@@ -170,15 +170,7 @@ const sponsorPageCartListReducer = (state = DEFAULT_STATE, action) => {
 
       return {
         ...state,
-        cartForm: {
-          ...cartForm,
-          items: [
-            ...cartForm.items.map((item) => ({
-              ...item,
-              notes: item.user_notes || ""
-            }))
-          ]
-        }
+        cartForm
       };
     }
     case SPONSOR_CART_NOTE_ADDED: