Add radix boundary tests

[nordzilla]

Adds tests which test the boundary locations for each radix.

For radix 2, this means testing that the count is correct for the following pairs:

(1, 2) -> (3, 4) -> (7, 8) -> (15, 16) -> etc.

For radix 8, this means testing that the count is correct for the following pairs:

(7, 8) -> (63, 64) -> (511, 512) -> etc.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (35e2acf) 100.00% compared to head (a5df805) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #7   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         1           
  Lines          159       192   +33     
  Branches       159       192   +33     
=========================================
+ Hits           159       192   +33     

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