useRoute is undefined when following vue-test-utils guide to test with Composition API

Yes, it seems related. We have this issue with version 4.1+ of vue-router. Using the latest version, the following mocks make the tests fail

vi.mock('vue-router', () => ({
  useRoute: () => ({
    query: { pageNumber: 1 },
  }),
}));

When changing the mocks like this, the tests will succeed again.

vi.mock('vue-router/dist/vue-router.mjs', () => ({
  useRoute: () => ({
    query: { pageNumber: 1 },
  }),
}));

So, the workaround is to mock the .mjs version until https://github.com/vitejs/vite/issues/8659 has been fixed

Is this related to https://github.com/vitest-dev/vitest/issues/1484 or https://github.com/vitejs/vite/issues/8659?