by setting up localVue with all required plugins (such as styleguide and vuex)
in a separate testSetup file we can avoid doing this individually in all component tests
the testSetup is executed before each test suite, so each test file gets a fresh
instance of localVue
It might be that people try to register email addresses that they don't own. Then if the actual owner tries to add this email address, she should not get a unique constraint violation. Instead the email will be re-used.
Is this a security issue? Because we re-use the nonce? 🤔
I really don't understand why, but apparently `wrapper.html()` does some
re-rendering which in our cases fixes the tests, because we reach the
new sub component in the DOM tree.
