An example of writing integration tests with Miniflare, jose and Vitest.

Run the tests

npm run test

Observe an error

 src/jwt.test.ts [ src/jwt.test.ts ]
TypeError: deprecate is not a function
 ❯ node_modules/jose/dist/node/esm/runtime/rsaes.js:23:38

It happens because the jose library uses this and it seems like vitest-pool-workers doesn't support it.

import { deprecate } from 'node:util';

The jose library works in the production runtime of Cloudflare workers without the nodejs_compat flag, but vitest-pool-workers requires the flag, which feels paradoxical.