How to fix warning in Vue + Vuetify unit tests?

Question

Unit testing

Good day to all. There is a project on VUE with Vuetify plugin.
There is a component, not very complex but using the vuetify expansion-panel.
And when trying to test it, and when executing `mount()`, several messages like this are displayed in the console.
[Vue warn]: Unknown custom element: - did you register the component correctly? For recursive components, make sure to provide the "name" option.

How can this problem be solved? And how critical is it?

Answer 1

You most likely didn't include Vuetify in your test. As a consequence, its components were not registered.
See the plugin registration in the test using the VueRouter example