(#junit) Gradient Auto QC tests + improvements

[squaregoldfish]

Improved the algorithm while developing the tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.75%. Comparing base (4f59edc) to head (b350263).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2935      +/-   ##
============================================
+ Coverage     28.44%   28.75%   +0.30%     
- Complexity     1916     1937      +21     
============================================
  Files           386      386              
  Lines         19826    19822       -4     
  Branches       2655     2656       +1     
============================================
+ Hits           5639     5699      +60     
+ Misses        13784    13716      -68     
- Partials        403      407       +4     

Flag	Coverage Δ
unittests	28.75% <100.00%> (+0.30%)	⬆️

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