Test-fixtures + Vue & React --> https://polymer-library.polymer-project.org/1.0/docs/tools/tests#test-fixtures

Test-fixtures are an important tool is ensuring a clean run on a suite of tests. Then if you are adding and removing attributes, you don't have to make sure you've cleaned up all the impacts of what you've done in each test.

These fixtures struggle in a React and Vue environment or at least I haven't hit on the magic combination yet.

I've got some resources we can discuss too:

• https://dev.to/ionic/testing-web-components-in-react-4e49