improve: add more test

[Blankll]

improve: add more test

• improve test coverage for rosClient
• improve test coverage for iacHelper
• improve test coverage for getVersion

Refs:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.87%. Comparing base (d7453e0) to head (cffdd38).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #17       +/-   ##
===========================================
+ Coverage   81.04%   92.87%   +11.83%     
===========================================
  Files          37       38        +1     
  Lines         364      365        +1     
  Branches       49       49               
===========================================
+ Hits          295      339       +44     
+ Misses         60       11       -49     
- Partials        9       15        +6     

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