Refactor the tests into independent modules

[odow]

Tests were all over the place with imports and definitions. I don't know if this will help the allocation issue.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.57%. Comparing base (c575d94) to head (db90c79).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #352      +/-   ##
==========================================
+ Coverage   91.53%   91.57%   +0.03%     
==========================================
  Files          23       23              
  Lines        2304     2303       -1     
==========================================
  Hits         2109     2109              
+ Misses        195      194       -1     

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[blegat]

Thanks, this is much cleaner