test: Add error type check in test.

[erikgeiser]

No description provided.

[codecov]

Codecov Report

Merging #9 (9fa4c2f) into main (0b47fb0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   82.97%   82.97%           
=======================================
  Files           2        2           
  Lines          94       94           
=======================================
  Hits           78       78           
  Misses          9        9           
  Partials        7        7           

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