I have a page that uses this page template (sling:resourceType = /apps/flinders/components/page/content-page)
to test selectors (which I have not done before), I created a copy of /apps/flinders/components/page/content-page/content-page.html and called it /apps/flinders/components/page/content-page/content-page.test.html. The contents of the 2 files are the same EXCEPT 2 changes I made:
I added a "hello there" text on the test.html version.
The body tag of the test.html version does not have a CSS class attached to it.