test: add "application/protobuf" handling test (#1443)

Co-authored-by: Daniel Gollings <daniel@keana.io>
Co-authored-by: Artem Zakharchenko <kettanaito@gmail.com>

test/node/rest-api/request/body/body-protobuf.node.test.ts

@@ -0,0 +1,38 @@
+// @vitest-environment node
+import { http, HttpResponse } from 'msw'
+import { setupServer } from 'msw/node'
+
+const server = setupServer(
+  http.post('https://example.com/protobuf', async ({ request }) => {
+    const buffer = await request.arrayBuffer()
+
+    return new HttpResponse(new Uint8Array(buffer), {
+      headers: {
+        'Content-Type': 'application/protobuf',
+      },
+    })
+  }),
+)
+
+beforeAll(() => {
+  server.listen()
+})
+
+afterAll(() => {
+  server.close()
+})
+
+it('responds with a "application/protobuf" mocked response', async () => {
+  const payload = new Uint8Array([138, 1, 6, 10, 4, 10, 2, 32, 1])
+
+  const response = await fetch('https://example.com/protobuf', {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/protobuf',
+    },
+    body: payload,
+  })
+  const body = await response.arrayBuffer()
+
+  expect(new Uint8Array(body)).toEqual(payload)
+})