Process of creating an OpenROV plugin



I’m trying to set up a plugin for the OpenROV cockpit and have been following these videos to learn how to do so: [Tutorial] Creating an OpenROV Plugin
I’ve also been referring to this guide from the OpenROV site that walks you through the steps of creating a plugin:

I’m having trouble finding the testviews.html file being that is used to test the plugins. This is mentioned in the second step of the guide and also in the second video. Does anyone know how I could access the testviews.html file? Thanks!