test: add unit test

[dongzl]

What this PR does:

Which issue(s) this PR fixes:

For #777 #775

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2c4be46) 40.13% compared to head (6458e6b) 40.33%.
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #800      +/-   ##
==========================================
+ Coverage   40.13%   40.33%   +0.20%     
==========================================
  Files         265      265              
  Lines       26711    26711              
==========================================
+ Hits        10720    10775      +55     
+ Misses      14818    14782      -36     
+ Partials     1173     1154      -19     

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[cr-gpt]

Seems you are using me but didn't get OPENAI_API_KEY seted in Variables/Secrets for this repo. you could follow readme for more information

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

No Coverage information
0.0% Duplication