Unit test framework integrated and setup has been done
Fixed the spec file issues and perfomed the initial run

Current Unit Tests Metrics:
=============================== Coverage summary ===============================

Statements   : 30.09% ( 4300/14289 )

Branches     : 8.41% ( 409/4862 )

Functions    : 10.82% ( 413/3815 )

Lines        : 29.03% ( 3928/13529 )

================================================================================
Test Suites: 165 passed, 165 total

Tests:       267 passed, 267 total

Snapshots:   0 total

Time:        19.91 s

Ran all test suites.
Target:
Healthy coverage targets (industry realistic)
Statements: 60–80%

Branches: 50%+ minimum

Functions: 60%+

Lines: 70%+

The changes has been tested locally.