test: Increase pkg/common/utils coverage to more than 93%

[ricardo3202]

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test

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提高对pkg/common/utils的覆盖率至93%以上

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en:Increased unit test coverage for pkg/common/utils from 91.1% to 93.3%
zh(optional):提高对pkg/common/utils的单元测试，覆盖率从91.1%提高到了93.3%

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.89%. Comparing base (9162dd1) to head (760f2b5).
Report is 8 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1108      +/-   ##
===========================================
+ Coverage    82.75%   82.89%   +0.14%     
===========================================
  Files           98       98              
  Lines        10044    10062      +18     
===========================================
+ Hits          8312     8341      +29     
+ Misses        1241     1232       -9     
+ Partials       491      489       -2     

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