test: Increase pkg/common/utils coverage to more than 90%

[liuxianloveqiqi]

What type of PR is this?

test

Check the PR title.

• This PR title match the format: <type>(optional scope): <description>
• The description of this PR title is user-oriented and clear enough for others to understand.
• Attach the PR updating the user documentation if the current PR requires user awareness at the usage level. User docs repo

(Optional) Translate the PR title into Chinese.

提高对pkg/common/utils的覆盖率至90%以上

(Optional) More detailed description for this PR(en: English/zh: Chinese).

en:Increased unit test coverage for pkg/common/utils from 88.6% to 91.5%
zh(optional):提高对pkg/common/utils的单元测试，覆盖率从88.6%提高到了91.5%

(Optional) Which issue(s) this PR fixes:

#257 (comment)

(Optional) The PR that updates user documentation:

[CLAassistant]

All committers have signed the CLA.

[Duslia]

Well done!

[welkeyever]

CI break: Run this before submit: gofumpt -l -w -extra .

[liuxianloveqiqi]

CI break: Run this before submit: gofumpt -l -w -extra .

Thank you, the first time I contributed to hertz did not understand, now I have formatted the code with gofumpt and commit it now.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.05% 🎉

Comparison is base (025f404) 81.99% compared to head (9652d5f) 82.04%.

❗ Current head 9652d5f differs from pull request most recent head d02396e. Consider uploading reports for the commit d02396e to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #948      +/-   ##
===========================================
+ Coverage    81.99%   82.04%   +0.05%     
===========================================
  Files           97       97              
  Lines         9631     9631              
===========================================
+ Hits          7897     7902       +5     
+ Misses        1260     1256       -4     
+ Partials       474      473       -1     

see 3 files with indirect coverage changes

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[liuxianloveqiqi]

@welkeyever Branch merge request

[liuxianloveqiqi]

@li-jin-gou apply for merging,please!

[welkeyever]

LGTM, thx~