apps/api/src/orders/order-quantity-assignment-3.test.ts

@@ -2,12 +2,13 @@ import { afterEach, beforeEach, describe, expect, test } from "bun:test";
 import type { AppWithContext } from "../app";
 import { buildApp } from "../app";
 import { createUser } from "../users/user-repository";
+import { findOrderDetail, listOrderAuditEvents, updateOrderStatus } from "./order-repository";
 
 let app: AppWithContext;
 let employeeCookie = "";
 
 function firstHeader(value: string | string[] | undefined) {
-  return Array.isArray(value) ? value[0] : value ?? "";
+  return (Array.isArray(value) ? value[0] : value) ?? "";
 }
 
 async function login(username: string) {
@@ -43,29 +44,35 @@ describe("assignment 3 quantity validation", () => {
 
     expect(response.statusCode).toBe(200);
     expect(response.json().items.find((item: { id: string }) => item.id === "item_1")?.quantity).toBe(5);
+    const order = await findOrderDetail(app.dbContext, "order_1");
+    expect(order?.items.find((item) => item.id === "item_1")?.quantity).toBe(5);
+    const events = await listOrderAuditEvents(app.dbContext, "order_1");
+    expect(events.filter((event) => event.type === "order.item.quantity_changed")).toEqual([
+      expect.objectContaining({ actor: "dev-employee", message: "Updated item item_1 quantity to 5." })
+    ]);
   });
 
-  test("rejects quantity changes for processing orders", async () => {
-    const response = await app.inject({
-      method: "POST",
-      url: "/api/orders/order_2/items/item_3/quantity",
-      headers: { cookie: employeeCookie },
-      payload: { quantity: 2 }
+  for (const status of ["processing", "shipped", "cancelled", "refunded"] as const) {
+    test(`rejects quantity changes for ${status} orders without side effects`, async () => {
+      await updateOrderStatus(app.dbContext, "order_1", status, "2025-01-16T10:00:00.000Z");
+      const beforeOrder = await findOrderDetail(app.dbContext, "order_1");
+      const beforeEvents = await listOrderAuditEvents(app.dbContext, "order_1");
+
+      for (const payload of [{ quantity: 5 }, { quantity: 5, status: "pending" }]) {
+        const response = await app.inject({
+          method: "POST",
+          url: "/api/orders/order_1/items/item_1/quantity",
+          headers: { cookie: employeeCookie },
+          payload
+        });
+
+        expect(response.statusCode).toBe(400);
+        expect(response.json<{ message: string }>()).toEqual({ message: "Order items cannot be changed for this order status." });
+        expect(await findOrderDetail(app.dbContext, "order_1")).toEqual(beforeOrder);
+        expect(await listOrderAuditEvents(app.dbContext, "order_1")).toEqual(beforeEvents);
+      }
     });
-
-    expect(response.statusCode).toBe(400);
-  });
-
-  test("rejects quantity changes for shipped orders", async () => {
-    const response = await app.inject({
-      method: "POST",
-      url: "/api/orders/order_3/items/item_4/quantity",
-      headers: { cookie: employeeCookie },
-      payload: { quantity: 1 }
-    });
-
-    expect(response.statusCode).toBe(400);
-  });
+  }
 
   test("rejects quantity outside the allowed range", async () => {
     const response = await app.inject({

apps/api/src/orders/order-status.ts

@@ -1,7 +1,7 @@
 import type { OrderStatus } from "@orderops/shared/order-status";
 
 export function canEditOrderItems(status: OrderStatus) {
-  return status === "pending" || status === "processing";
+  return status === "pending";
 }
 
 export function canEditShippingAddress(status: OrderStatus) {