Test: adding library files for unittests

[sugetha24]

Change Summary

Adding library files needed for unittests. This is a partial PR from this PR/553

Repository Checklist

• [x] My code has been rebased from devel before I start
• [x] I have read the CONTRIBUTING document.
• [x] My change requires a change to the documentation and documentation have been updated accordingly. (check the box if not applicable)
• [ ] I have updated molecule CI testing accordingly. (check the box if not applicable)