moved unittests to utest library

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.93%. Comparing base (897f5d1) to head (32f1913).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #679 +/- ## ========================================== + Coverage 88.76% 92.93% +4.17% ========================================== Files 19 19 Lines 7590 7519 -71 Branches 331 1996 +1665 ========================================== + Hits 6737 6988 +251 - Misses 522 531 +9 + Partials 331 0 -331 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.