Getting started with both Functional Javascript and Nightwatch Testing in Drupal 8.6 or later
In a previous article, I looked into how to get started with Running Tests using Drupal Contributions on top of a local Lando container. I looked a little at the history of Drupal testing and in particular how to get started running PHP Unit tests.
Types of Drupal Tests
If we look at core Drupal Views module under tests/src we can see the following in the core/tests folder