Adds async default transformer integration test

test/msw-api/context/async-response-transformer.mocks.ts

@@ -1,4 +1,11 @@
-import { ResponseTransformer, setupWorker, rest, context, compose } from 'msw'
+import {
+  ResponseTransformer,
+  setupWorker,
+  rest,
+  context,
+  compose,
+  createResponseComposition,
+} from 'msw'
 import base64Image from 'url-loader!../../fixtures/image.jpg'
 
 async function jpeg(base64: string): Promise<ResponseTransformer> {
@@ -11,10 +18,24 @@ async function jpeg(base64: string): Promise<ResponseTransformer> {
   )
 }
 
+const customResponse = createResponseComposition(null, [
+  async (res) => {
+    res.statusText = 'Custom Status Text'
+    return res
+  },
+  async (res) => {
+    res.headers.set('x-custom', 'yes')
+    return res
+  },
+])
+
 const worker = setupWorker(
   rest.get('/image', async (req, res, ctx) => {
     return res(ctx.status(201), await jpeg(base64Image))
   }),
+  rest.post('/search', (req, res, ctx) => {
+    return customResponse(ctx.status(301))
+  }),
 )
 
 worker.start()

test/msw-api/context/async-response-transformer.test.ts

@@ -27,3 +27,25 @@ test('supports asynchronous response transformer', async () => {
 
   return runtime.cleanup()
 })
+
+test('supports asynchronous default response transformer', async () => {
+  const runtime = await runBrowserWith(
+    path.resolve(__dirname, 'async-response-transformer.mocks.ts'),
+  )
+
+  const res = await runtime.request({
+    url: `${runtime.origin}/search`,
+    fetchOptions: {
+      method: 'POST',
+    },
+  })
+  const status = res.status()
+  const statusText = res.statusText()
+  const headers = res.headers()
+
+  expect(status).toBe(301)
+  expect(statusText).toBe('Custom Status Text')
+  expect(headers).toHaveProperty('x-custom', 'yes')
+
+  return runtime.cleanup()
+})