test: ✅ refactor client code and add more tests

[Tochemey]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.90%. Comparing base (5d160c2) to head (38e1d9b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #941      +/-   ##
==========================================
+ Coverage   91.65%   91.90%   +0.24%     
==========================================
  Files         130      130              
  Lines       12130    12121       -9     
==========================================
+ Hits        11118    11140      +22     
+ Misses        762      733      -29     
+ Partials      250      248       -2     

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