Fix: Cases

[localheinz]

This pull request

• adds more test cases

[codecov]

Codecov Report

Merging #15 (c3f7f02) into main (537a5b0) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main       #15   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        22        22           
===========================================
  Files              4         4           
  Lines             67        67           
===========================================
  Hits              67        67           

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