test: add fetch relative url test in jsdom

test/node/rest-api/request/matching/relative-url.node.test.ts

@@ -0,0 +1,32 @@
+/**
+ * @vitest-environment jsdom
+ */
+import { http, HttpResponse } from 'msw'
+import { setupServer } from 'msw/node'
+
+const server = setupServer(
+  http.get('/api/movies', () => {
+    return HttpResponse.json([
+      { title: 'The Lord of the Rings' },
+      { title: 'The Matrix' },
+    ])
+  }),
+)
+
+beforeAll(() => {
+  server.listen()
+})
+
+afterAll(() => {
+  server.close()
+})
+
+it('responds to a relative URL in jsdom', async () => {
+  const response = await fetch('/api/movies')
+
+  expect(response.status).toBe(200)
+  expect(await response.json()).toEqual([
+    { title: 'The Lord of the Rings' },
+    { title: 'The Matrix' },
+  ])
+})