Tests/file tests

[zorkow]

Api and debug tests that involve file output

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.31%. Comparing base (29ccc9a) to head (e3c6963).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #839      +/-   ##
===========================================
+ Coverage    92.61%   93.31%   +0.69%     
===========================================
  Files          165      165              
  Lines        40237    40237              
  Branches      4415     4909     +494     
===========================================
+ Hits         37266    37546     +280     
+ Misses        2971     2691     -280     

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