TST: Unit test data module load function

[jhlegarreta]

Unit test data module load function.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.04%. Comparing base (fc78dec) to head (839c629).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #358      +/-   ##
==========================================
+ Coverage   79.47%   80.04%   +0.56%     
==========================================
  Files          34       34              
  Lines        1959     1959              
  Branches      207      207              
==========================================
+ Hits         1557     1568      +11     
+ Misses        342      335       -7     
+ Partials       60       56       -4     

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