improve test

[huangshiyu13]

Description

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have ensured make test pass (required).
• I have checked the code using make format (required).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9a05e6f) 69.22% compared to head (e29fd90) 70.06%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #279      +/-   ##
==========================================
+ Coverage   69.22%   70.06%   +0.84%     
==========================================
  Files         252      252              
  Lines       13160    13033     -127     
==========================================
+ Hits         9110     9132      +22     
+ Misses       4050     3901     -149     

Flag	Coverage Δ
unittests	70.06% <ø> (+0.84%)	⬆️

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