Remove __file__ usage in test units for test_files path

[ghiggi]

• Closes #xxxx
• Tests added
• Tests passed
• Passes git diff origin/main **/*py | flake8 --diff
• Fully documented

Remove __file__ usage in test units for test_files path.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (ba09e7d) 94.25% compared to head (de6049b) 94.09%.
Report is 55 commits behind head on main.

Files	Patch %	Lines
pyresample/test/test_plot.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #563      +/-   ##
==========================================
- Coverage   94.25%   94.09%   -0.17%     
==========================================
  Files          82       84       +2     
  Lines       13077    13233     +156     
==========================================
+ Hits        12326    12451     +125     
- Misses        751      782      +31     

Flag	Coverage Δ
unittests	94.09% <95.65%> (-0.17%)	⬇️

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[coveralls]

coverage: 93.674% (+0.003%) from 93.671%
when pulling de6049b on ghiggi:refactor-test-files-path
into c39f51e on pytroll:main.

[ghiggi]

@mraspaud @djhoese ready for review.
Let me know if you prefer to have test_files_path lower case or upper case, and if to be located in test/conftest or test/utils

[mraspaud]

LGTM!

[mraspaud]

@mraspaud @djhoese ready for review. Let me know if you prefer to have test_files_path lower case or upper case, and if to be located in test/conftest or test/utils

For me it's good as it is.

[djhoese]

My one comment which is the same as in the other PR is that I think should should have been a Path object. Path(__file__).resolve().parent(). Otherwise, good enough.

[mraspaud]

Sorry, I merged too fast