Add test to check that user has permission to edit the node before we allow them to

Problem/Motivation

In 🐛 It is not possible to allow users to Edit nodes only (role permissions are bypassed) Fixed we realised that is someone has access to edit content at path /example, then they can edit all the content in there, even if they do not have permission to edit some of the content types.

We have that fixed now, but it would be good to have a test to make sure it doesn't break again.