feat(test): add unit test for function

[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?:

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
5 Code Smells

No Coverage information
1.4% Duplication

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.17% ⚠️

Comparison is base (c80f220) 36.58% compared to head (0f8410f) 36.41%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #726      +/-   ##
==========================================
- Coverage   36.58%   36.41%   -0.17%     
==========================================
  Files         247      247              
  Lines       26157    26157              
==========================================
- Hits         9570     9526      -44     
- Misses      15519    15600      +81     
+ Partials     1068     1031      -37     

see 8 files with indirect coverage changes

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