feat(test): Improve unit test coverage

[Ahoo-Wang]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.80%. Comparing base (711157e) to head (469de71).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #676      +/-   ##
============================================
+ Coverage     84.68%   84.80%   +0.11%     
- Complexity     1290     1292       +2     
============================================
  Files           210      210              
  Lines          4167     4165       -2     
  Branches        421      421              
============================================
+ Hits           3529     3532       +3     
+ Misses          357      353       -4     
+ Partials        281      280       -1     

Flag	Coverage Δ
unittests	84.80% <ø> (+0.11%)	⬆️

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