Measure code coverage

[greshilov]

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[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@1dea7b8). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #5   +/-   ##
=========================================
  Coverage          ?   87.64%           
=========================================
  Files             ?        5           
  Lines             ?       89           
  Branches          ?        0           
=========================================
  Hits              ?       78           
  Misses            ?       11           
  Partials          ?        0           

Flag	Coverage Δ
unit	87.64% <0.00%> (?)

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