Feature/add ecfs test

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 61.53846% with 5 lines in your changes missing coverage. Please review.

Project coverage is 89.86%. Comparing base (7b9dd3e) to head (490aab5).

Files with missing lines	Patch %	Lines
tests/sources/test_ecfs.py	61.53%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #570      +/-   ##
===========================================
- Coverage    89.89%   89.86%   -0.04%     
===========================================
  Files          149      150       +1     
  Lines        10975    10988      +13     
  Branches       519      520       +1     
===========================================
+ Hits          9866     9874       +8     
- Misses         942      946       +4     
- Partials       167      168       +1     

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