[Bug]: Fetch API unavailable in "jsdom" test environment

[hahanein]

Version

29.4.1

Steps to reproduce

1. Clone my repo at https://github.com/hahanein/no-fetch-api-in-jsdom-environment
2. pnpm i
3. pnpm test
4. You should see the error "ReferenceError: fetch is not defined"

Expected behavior

I expect to see the following results:

 PASS  ./script.test.js
  ✓ testing fetch (670 ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total

Actual behavior

The test is failing with the error message "ReferenceError: fetch is not defined".

However, when you remove the line testEnvironment: 'jsdom' from jest.config.js everything is working as expected.

Additional context

Due to this behavior we are forced to polyfill the Fetch API (fetch, Response, Request, ...) at my workplace. This is becoming progressively more tedious. node-fetch/node-fetch#1263

Environment

System:
    OS: Linux 6.1 Arch Linux
    CPU: (8) x64 AMD Ryzen 5 PRO 3500U w/ Radeon Vega Mobile Gfx
  Binaries:
    Node: 19.4.0 - /usr/bin/node
    Yarn: 1.22.19 - /usr/bin/yarn
    npm: 8.19.2 - /usr/bin/npm
  npmPackages:
    jest: ^29.4.1 => 29.4.1

[SimenB]

Yeah, fetch is only available in using the node environment atm.

See jsdom/jsdom#1724

[github-actions]

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