feat: add convergent test in webapp

[Enter-tainer]

fix #9

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.78%. Comparing base (054e835) to head (e6caae2).
Report is 1 commits behind head on master.

❗ Current head e6caae2 differs from pull request most recent head c14ea9c. Consider uploading reports for the commit c14ea9c to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #11   +/-   ##
=======================================
  Coverage   91.78%   91.78%           
=======================================
  Files           6        6           
  Lines         876      876           
=======================================
  Hits          804      804           
  Misses         72       72           

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