Addition of test for missing aggregation function when require_all_aggregators=True

[talagayev]

Fixes #4650

Changes made in this Pull Request:

• Addition of test_missing_aggregator in test_results.py to cover ValueError case when
  the aggregation is missing and require_all_aggregators=True in ResultsGroup.merge()

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

Developers certificate of origin

• I certify that this contribution is covered by the LGPLv2.1+ license as defined in our LICENSE and adheres to the Developer Certificate of Origin.

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📚 Documentation preview 📚: https://mdanalysis--4770.org.readthedocs.build/en/4770/

[pep8speaks]

Hello @talagayev! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2024-10-28 13:36:34 UTC

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.67%. Comparing base (e776f12) to head (5d32d15).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4770   +/-   ##
========================================
  Coverage    93.66%   93.67%           
========================================
  Files          177      177           
  Lines        21726    21726           
  Branches      3052     3052           
========================================
+ Hits         20349    20351    +2     
+ Misses         930      928    -2     
  Partials       447      447           

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