Nuxt 2 Jest context

[Julien-Martin]

Reproduction

Thank you so much for such a great lib.
I found a little bug when testing store that use this.$nuxt

TypeError: Cannot destructure property '$config' of 'this.$nuxt' as it is undefined.

Sandbox: https://codesandbox.io/s/competent-field-w3j63?file=/test/use-main-store-error.spec.js

Steps to reproduce the behavior

1. Inside actions use this.$nuxt to access the nuxt context
2. Test the action => yarn test
3. See error

Expected behavior

The test should pass because $nuxt should exist in this context

Actual behavior

The test throw an error

TypeError: Cannot destructure property '$config' of 'this.$nuxt' as it is undefined.

Additional information

I found a little workaround in my test to avoid this error

File: https://codesandbox.io/s/competent-field-w3j63?file=/test/use-main-store-working.spec.js

beforeEach(() => {
    const pinia = setActivePinia(createPinia());
    const contextMock = {
      $config: {
        CONFIG_1: 1
      }
    };
    pinia._p.push(({ store }) => {
      Object.defineProperty(store, "$nuxt", { value: contextMock });
    });
  });

[posva]

This is not a bug, you need to mock the nuxt context. I don’t know if nuxt provides something to easily mock their context though

[posva]

Added to #829