Which documentation is relevant for testing?

[Frank Kühndel]

Hello all,

I want to acquaint myself with testing in RTEMS. I found two sources of 
documentation on this topic:

   * the RTEMS User Manual Chapter "9. Testing"
     https://docs.rtems.org/branches/master/user/testing/index.html

   * and the file rtems-tools/doc/rtems-tester.txt
     https://git.rtems.org/rtems-tools/tree/doc/rtems-tester.txt

Please, could you point out which of these two is authoritative?

Thank you in advance
Frank