Converted fileformats/um to pytest

[ESadek-MO]

🚀 Pull Request

• All PT checks pass

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.18%. Comparing base (4141484) to head (9edbb2d).
⚠️ Report is 67 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6930      +/-   ##
==========================================
- Coverage   90.43%   90.18%   -0.26%     
==========================================
  Files          91       91              
  Lines       24839    24822      -17     
  Branches     4656     4656              
==========================================
- Hits        22463    22385      -78     
- Misses       1608     1669      +61     
  Partials      768      768              

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[HGWright]

Thanks @ESadek-MO. Now lets see if there are any unittests left.