Describe the bug

When a server ist configured to listen with onUnhandledRequest: "error", the test where this error occurs does not fail.

Based on this discussion: #943

Environment

• Next.js, Jest, React Testing Library & MSW

https://github.com/bennettdams/msw-nextjs-bug/blob/master/package.json

This happens for a fresh install with all default configuration from the Next.js & MSW docs.

• msw: 0.35.0
• nodejs: 14.18.0
• npm: 6.14.15

To Reproduce

Reproduction repo: https://github.com/bennettdams/msw-nextjs-bug

To try it out:
npm i
npm run test

Steps to reproduce the behavior from zero:

1. Install initial Create Next App with TypeScript
   npx create-next-app@latest --use-npm --ts .
   bennettdams/msw-nextjs-bug@2cf426a

2. Create src folder at root and move pages folder to it
   bennettdams/msw-nextjs-bug@78b657e

3. Install & configure Jest, testing libs, etc. based on Next's docs:
   npm install --save-dev jest babel-jest @testing-library/react @testing-library/jest-dom identity-obj-proxy react-test-renderer
   bennettdams/msw-nextjs-bug@aaf1fb3

4. Create a simple test file based on Next's docs:
   bennettdams/msw-nextjs-bug@bd9ba77

5. Install MSW and follow setup for mocks/handlers/server via docs:
   npm install msw --save-dev
   bennettdams/msw-nextjs-bug@cdd07c1

6. Integrate MSW with Jest
   bennettdams/msw-nextjs-bug@3973836

7. Install and utilize whatwg-fetch - needed for Polyfill with Next.js
   npm install -D whatwg-fetch
   bennettdams/msw-nextjs-bug@5cbe84a

8. Change server config to onUnhandledRequest: "error" and add some simple fetch execution in the tested component
   bennettdams/msw-nextjs-bug@f77bb0f

==> The test does not fail, even though the tests shows the error.

Expected behavior

When onUnhandledRequest is configured with error and an unhandled request is found, the test shoud fail.