Added testing for the pool ke and fixed a small bug.

[davidv1992]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 97.57576% with 12 lines in your changes missing coverage. Please review.

Project coverage is 83.64%. Comparing base (094b5ea) to head (ac7e5fa).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/nts/mod.rs	77.77%	10 Missing ⚠️
src/pool_ke.rs	99.55%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #14       +/-   ##
===========================================
+ Coverage   72.17%   83.64%   +11.47%     
===========================================
  Files           8        8               
  Lines        1962     2446      +484     
===========================================
+ Hits         1416     2046      +630     
+ Misses        546      400      -146     

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