test(swamp/share): cover share module with swamp tests

[vgonkivs]

self-explanatory

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 45.28%. Comparing base (2469e7a) to head (6cd9e3b).
Report is 413 commits behind head on main.

Files with missing lines	Patch %	Lines
share/shwap/sample.go	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4036      +/-   ##
==========================================
+ Coverage   44.83%   45.28%   +0.45%     
==========================================
  Files         265      309      +44     
  Lines       14620    22201    +7581     
==========================================
+ Hits         6555    10054    +3499     
- Misses       7313    11068    +3755     
- Partials      752     1079     +327     

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