add context level test

[muir]

No description provided.

[codecov-commenter]

Codecov Report

Base: 86.16% // Head: 87.35% // Increases project coverage by +1.19% 🎉

Coverage data is based on head (53b66a8) compared to base (250a92f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
+ Coverage   86.16%   87.35%   +1.19%     
==========================================
  Files          42       42              
  Lines        4871     4871              
==========================================
+ Hits         4197     4255      +58     
+ Misses        590      530      -60     
- Partials       84       86       +2     

Flag	Coverage Δ
go_tests	87.35% <ø> (+1.19%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
xopjson/jsonlogger.go	76.60% <0.00%> (+0.39%)	⬆️
sub.go	92.94% <0.00%> (+0.78%)	⬆️
context.go	86.66% <0.00%> (+60.00%)	⬆️

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