Fix tests

[sphamba]

Summary

• fix download tests (missing context for mocked config)
• fix type-hint in facetgrid.py making test fail

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.24%. Comparing base (d44a1dd) to head (19e9378).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #39   +/-   ##
=======================================
  Coverage   63.24%   63.24%           
=======================================
  Files          63       63           
  Lines        5863     5863           
=======================================
  Hits         3708     3708           
  Misses       2155     2155           

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[coveralls]

coverage: 63.244%. remained the same
when pulling 19e9378 on EPFL-ENAC:fix-tests
into d44a1dd on ghiggi:main.