Improve block code coverage with more tests

[nietras]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.54%. Comparing base (ea1b165) to head (966eed2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #205      +/-   ##
==========================================
+ Coverage   99.34%   99.54%   +0.19%     
==========================================
  Files          47       47              
  Lines        3510     3512       +2     
  Branches      384      384              
==========================================
+ Hits         3487     3496       +9     
+ Misses         20       14       -6     
+ Partials        3        2       -1     

Flag	Coverage Δ
Debug	99.37% <100.00%> (+0.57%)	⬆️
Release	99.83% <100.00%> (+0.28%)	⬆️
macos-latest	91.97% <100.00%> (+0.31%)	⬆️
ubuntu-latest	99.51% <100.00%> (+0.37%)	⬆️
windows-latest	99.51% <100.00%> (+0.37%)	⬆️

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