added some test code to dataset domain model

[t29mato]

In PR #207, Codecov has been integrated.

This is a sample PR to show Codecov's comment on GitHub PR.
Now, the test coverage will be displayed for PRs like this PR, along with the differences showing how much the PR improves test coverage.

Please check and merge if there are no issues.

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1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
starrydigitizer	⬜️ Ignored (Inspect)			Sep 24, 2024 9:07am

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.77%. Comparing base (864301c) to head (a08c340).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #209      +/-   ##
==========================================
+ Coverage   42.95%   45.77%   +2.81%     
==========================================
  Files          30       30              
  Lines         994      994              
  Branches      149      149              
==========================================
+ Hits          427      455      +28     
+ Misses        566      538      -28     
  Partials        1        1              

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