Bug: PR 2327 introduces regression in vm

[davidnixon]

Describe the bug

This change
#2327
broke my test case.

To Reproduce

Pull this PR
carbon-design-system/carbon-components-vue#1662
Run
yarn test src/components/CvAccordion/__tests__/CvAccordion.spec.js

The change in the PR #2327 removes the visibility of componentRef in the vm. It maybe related to the component using defineExpose({ state }); which is not used elsewhere in our components.

Reverting the change on #2327 fixes the test case.

Expected behavior

    const acc = wrapper.findComponent(`.${carbonPrefix}--accordion`);
    expect(Boolean(acc.vm.componentRef)).toBe(true);

Related information:

Additional context

[cexbrayat]

Pinging @freakzlike who authored the PR as he may have more insights

[freakzlike]

I'm not quite sure if I understand correctly, but what I see in your test case, that it's working correctly now and it was wrong previously:

https://github.com/carbon-design-system/carbon-components-vue/blob/main/src/components/CvAccordion/__tests__/CvAccordion.spec.js#L60

<template>
  <cv-accordion @change="handleChange" ref="componentRef">
  // ...

// finds the instance of CvAccordion.vue
const acc = wrapper.findComponent(`.${carbonPrefix}--accordion`);
// But this expects `acc.vm` to be the parent component
expect(acc.vm.componentRef.state).toEqual(expectedState);

So you should do now

expect(acc.vm.state).toEqual(expectedState);
// or
expect(wrapper.vm.componentRef.state).toEqual(expectedState);

I'm sorry for the regression, but this is how it should be in my opinion.