style guide ref:
https://docs.civicrm.org/dev/en/latest/documentation/style-guide/#hackable-urls

https://github.com/civicrm/civicrm-dev-docs/pull/425#issuecomment-338253390

Page should not link to itself.

I'd like to be able to merge the general, incremental improvements for the
"Testing" section, but these two new pages aren't yet written.  Comment them
out.

 * Provide a better visualization of the the different test suites
 * Migrate setup instructions from https://github.com/civicrm/civicrm-core/blob/master/tests/README.md

There are multiple tools for testing in JS. We'll want separate pages for each.

The second statement doesn't make much sense without the first statement.
Put them together.