Default props modified between tests suites

[Alex-Sokolov]

Version

1.0.0-beta.11

Reproduction link

https://jsfiddle.net/bqtfqwpw/

Steps to reproduce

Tested component: https://jsfiddle.net/g7s289sh/
Tests suites: https://jsfiddle.net/bqtfqwpw/

1. Install vue/test-utils 1.0.0-beta.10
2. Run tests => All ok
3. Update vue/test-utils to 1.0.0-beta.11
4. Run tests => Test fails

What is expected?

Tests passed

What is actually happening?

Tests failed

---

Looks like vue/test-utils shared default props between test suites

[LinusBorg]

We should probably do a deep-clone here;
https://github.com/vuejs/vue-test-utils/blob/dev/src/lib/create-instance.js#L51

[eddyerburgh]

The problem with doing a deep clone is that we wouldn't be able to use stubs passed in propsData 🤔