ci: improving pytest reporting

[germa89]

Description

Improving pytest reporting

Issue linked

Extracted from #1300

Checklist

• I have visited and read Develop PyMAPDL.
• I have tested my changes locally
• I have added necessary documentation or updated existing documentation.
• I have followed the PyMAPDL coding style guidelines.
• I have added appropriate unit tests that also ensure the minimal coverage criteria.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have marked this PR as draft if it is not ready to be reviewed yet.
• I have made sure that the title of my PR follows Commit naming conventions (e.g. feat: adding new MAPDL command)

Summary by Sourcery

Enhance pytest reporting by adding an additional environment variable to the header, truncating overly long test summary lines to a maximum length, and improving the assertion message in the MAPDL fixture.

Enhancements:

• Include PYMAPDL_ADDITIONAL_SWITCHES in the pytest report header
• Truncate long pytest summary and failure messages to 1000 characters
• Add wrap_len helper to enforce maximum message length in summaries
• Clarify MAPDL fixture assertion with guidance to stop existing instances

[ansys-reviewer-bot]

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[sourcery-ai]

Reviewer's Guide

This PR enhances pytest reporting by adding support for an extra environment variable in the header, introducing a global message‐length limit via a new wrap_len utility and applying it across all report outputs, and by improving an assertion error message in the mapdl fixture.

File-Level Changes

Change	Details	Files
Added additional environment variable to pytest report header	Insert "PYMAPDL_ADDITIONAL_SWITCHES" into the header env var list	tests/conftest.py
Implemented message length limiting utility	Define MAXIMUM_MESSAGE_LENGTH constant Add wrap_len() helper to truncate strings over the limit	tests/conftest.py
Applied truncation across all pytest report outputs	Wrap get_normal_message and get_failure_message outputs with wrap_len Slice messages to MAXIMUM_MESSAGE_LENGTH before write_line for passed, skipped, xfailed, xpassed, errored, and failed reports	tests/conftest.py
Enhanced mapdl fixture assertion message	Replace bare Path equality assertion with one that includes guidance on killing existing MAPDL instances	tests/conftest.py

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[germa89]

@pyansys-ci-bot LGTM.

[pyansys-ci-bot]

✅ Approving this PR because germa89 said so in here 😬

[sourcery-ai]

Hey @germa89 - I've reviewed your changes and they look great!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.18%. Comparing base (53ad87c) to head (126197c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4037      +/-   ##
==========================================
+ Coverage   89.05%   89.18%   +0.13%     
==========================================
  Files         187      187              
  Lines       14970    14970              
==========================================
+ Hits        13331    13351      +20     
+ Misses       1639     1619      -20     

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