TST : adding test for #1370

[pubpub-zz]

No description provided.

[codecov]

Codecov Report

Base: 94.10% // Head: 94.12% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (f8797fc) compared to base (d9aa64c).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1375      +/-   ##
==========================================
+ Coverage   94.10%   94.12%   +0.02%     
==========================================
  Files          28       28              
  Lines        5071     5072       +1     
  Branches     1052     1052              
==========================================
+ Hits         4772     4774       +2     
  Misses        177      177              
+ Partials      122      121       -1     

Impacted Files	Coverage Δ
PyPDF2/_cmap.py	95.55% <100.00%> (+0.46%)	⬆️

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[MartinThoma]

Thank you for adding the test!