Add try / catch unit tests

[cgewecke]

Prep for #852

• Adds test files and a description of current behavior in some basic cases

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (01ab173) 95.87% compared to head (c3a6430) 56.37%.

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Additional details and impacted files

@@             Coverage Diff             @@
##           master     #857       +/-   ##
===========================================
- Coverage   95.87%   56.37%   -39.50%     
===========================================
  Files          19       15        -4     
  Lines        1017      816      -201     
===========================================
- Hits          975      460      -515     
- Misses         42      356      +314     

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