Cleanup unit-test

[zhiqwang]

No description provided.

[codecov]

Codecov Report

Merging #246 (5e22e75) into main (db92e82) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #246   +/-   ##
=======================================
  Coverage   93.61%   93.61%           
=======================================
  Files          11       11           
  Lines         673      673           
=======================================
  Hits          630      630           
  Misses         43       43           

Flag	Coverage Δ
unittests	93.61% <ø> (ø)

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