feat(test): add unit test

[dongzl]

What this PR does:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +0.10% 🎉

Comparison is base (cae8667) 38.03% compared to head (0ff438b) 38.14%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #749      +/-   ##
==========================================
+ Coverage   38.03%   38.14%   +0.10%     
==========================================
  Files         251      252       +1     
  Lines       26236    26252      +16     
==========================================
+ Hits         9979    10013      +34     
+ Misses      15138    15121      -17     
+ Partials     1119     1118       -1     

see 6 files with indirect coverage changes

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
0.0% Duplication