tests: add sse tests

[yndu13]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.89%. Comparing base (f5bdfb5) to head (d3731d5).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #130   +/-   ##
=======================================
  Coverage   89.89%   89.89%           
=======================================
  Files           1        1           
  Lines         386      386           
  Branches       82       83    +1     
=======================================
  Hits          347      347           
  Misses         39       39           

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