test: split test files

[gounux]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.88%. Comparing base (e4b66e8) to head (a78d7e2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #36   +/-   ##
=======================================
  Coverage   89.88%   89.88%           
=======================================
  Files           3        3           
  Lines         257      257           
  Branches       30       30           
=======================================
  Hits          231      231           
  Misses         20       20           
  Partials        6        6           

Flag	Coverage Δ
unittests	89.88% <ø> (ø)

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