test(web): MSW harness with typed handlers, fixtures, and client tests

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/src/test/fixtures.ts

@@ -0,0 +1,34 @@
+import type { components } from "../api/schema";
+
+export type AdminObjectView = components["schemas"]["AdminObjectView"];
+export type AdminObjectPage = components["schemas"]["AdminObjectPage"];
+
+export const amphora: AdminObjectView = {
+  id: "11111111-1111-1111-1111-111111111111",
+  object_number: "LM-0042",
+  object_name: "Amphora",
+  number_of_objects: 1,
+  brief_description: "Storage jar",
+  current_location: "Vault 3",
+  current_owner: null,
+  recorder: null,
+  recording_date: null,
+  visibility: "public",
+  fields: {},
+};
+
+export const fibula: AdminObjectView = {
+  ...amphora,
+  id: "22222222-2222-2222-2222-222222222222",
+  object_number: "LM-0043",
+  object_name: "Bronze fibula",
+  visibility: "internal",
+  fields: {},
+};
+
+export const objectsPage: AdminObjectPage = {
+  items: [amphora, fibula],
+  total: 2,
+  limit: 50,
+  offset: 0,
+};

web/src/test/handlers.test.ts

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+import { expect, test } from "vitest";
+
+import { api } from "../api/client";
+
+test("default handler serves the objects page", async () => {
+  const { data } = await api.GET("/api/admin/objects", { params: { query: {} } });
+
+  expect(data?.total).toBe(2);
+  expect(data?.items[0].object_number).toBe("LM-0042");
+});

web/src/test/handlers.ts

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+import { http, HttpResponse } from "msw";
+
+import { amphora, fibula, objectsPage } from "./fixtures";
+
+export const handlers = [
+  http.get("/api/admin/me", () =>
+    HttpResponse.json({ id: "u1", email: "editor@example.com", role: "editor" }),
+  ),
+
+  http.get("/api/admin/objects", () => HttpResponse.json(objectsPage)),
+
+  http.get("/api/admin/objects/:id", ({ params }) => {
+    const found = [amphora, fibula].find((o) => o.id === params.id);
+
+    return found ? HttpResponse.json(found) : new HttpResponse(null, { status: 404 });
+  }),
+
+  http.get("/api/admin/field-definitions", () =>
+    HttpResponse.json([
+      {
+        key: "material",
+        data_type: "term",
+        vocabulary_id: "v1",
+        authority_kind: null,
+        required: false,
+        group: null,
+        labels: [{ lang: "en", label: "Material" }],
+      },
+    ]),
+  ),
+
+  http.post("/api/admin/login", () => new HttpResponse(null, { status: 204 })),
+
+  http.post("/api/admin/logout", () => new HttpResponse(null, { status: 204 })),
+];

web/src/test/server.ts

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+import { setupServer } from "msw/node";
+
+import { handlers } from "./handlers";
+
+export const server = setupServer(...handlers);

web/src/test/setup.ts

@@ -1 +1,11 @@
 import "@testing-library/jest-dom/vitest";
+import { afterAll, afterEach } from "vitest";
+
+import { server } from "./server";
+
+// Start MSW at module level so its fetch patch is in place before any test
+// module captures globalThis.fetch via openapi-fetch's createClient().
+server.listen({ onUnhandledRequest: "error" });
+
+afterEach(() => server.resetHandlers());
+afterAll(() => server.close());