test(isinspect): completed test cases

[Zack921]

Checklist:

• test cases has added or updated
• documentation has added or updated
• commit message follows the convention commit guidelines

[codecov]

Codecov Report

Merging #448 (5b7b230) into master (af11558) will increase coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #448      +/-   ##
==========================================
+ Coverage   89.00%   89.16%   +0.15%     
==========================================
  Files          20       20              
  Lines         646      646              
  Branches      102      102              
==========================================
+ Hits          575      576       +1     
+ Misses         70       69       -1     
  Partials        1        1              

Impacted Files	Coverage Δ
lib/core/util/isInspect.ts	100.00% <0.00%> (+16.66%)	⬆️

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[github-actions]

🎉 This PR is included in version 2.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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