Add compare test

[samaloney]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.52%. Comparing base (d6a5f8b) to head (2553b84).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #51      +/-   ##
==========================================
- Coverage   88.14%   85.52%   -2.62%     
==========================================
  Files           3        3              
  Lines         371      373       +2     
==========================================
- Hits          327      319       -8     
- Misses         44       54      +10     

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