Update tests, clean code

[TaiSakuma]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.59%. Comparing base (daf4bb8) to head (91ba471).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   99.59%   99.59%           
=======================================
  Files          65       66    +1     
  Lines        1735     1744    +9     
  Branches       76       76           
=======================================
+ Hits         1728     1737    +9     
  Misses          5        5           
  Partials        2        2           

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