test code cleanup

[Tanya-Solyanik]

renamed a test input class,
added exception message verification
and did a minor code cleanup

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.36590%. Comparing base (0c35754) to head (cf8282e).
Report is 4 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (0c35754) and HEAD (cf8282e). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (0c35754)	HEAD (cf8282e)
Debug	3	2
test	1	0

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #13309          +/-   ##
====================================================
- Coverage   62.22687%   40.36590%   -21.86097%     
====================================================
  Files           1556        1018         -538     
  Lines         159219       96257       -62962     
  Branches       14857       13453        -1404     
====================================================
- Hits           99077       38855       -60222     
+ Misses         59388       56976        -2412     
+ Partials         754         426         -328     

Flag	Coverage Δ
Debug	40.36590% <ø> (-21.86097%)	⬇️
integration	11.31380% <ø> (+0.00419%)	⬆️
production	40.36590% <ø> (+0.01247%)	⬆️
test	?
unit	37.72297% <ø> (+0.01246%)	⬆️

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