Improve test coverage

[lincmba]

IMPORTANT: Where possible all PRs must be linked to a Github issue

Resolves #37

Engineer Checklist

• I have written Unit tests for any new feature(s) and edge cases for
  bug fixes
• I have added documentation for any new feature(s) and configuration
  option(s) on the README.md
• I have run mvn spotless:check to check my code follows the project's
  style guide
• I have run mvn clean test jacoco:report to confirm the coverage report
  was generated at plugins/target/site/jacoco/index.html
• I ran mvn clean package right before creating this pull request.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.30%. Comparing base (e5c3ada) to head (138a2d4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##               main      #86       +/-   ##
=============================================
+ Coverage     44.25%   60.30%   +16.05%     
- Complexity      138      194       +56     
=============================================
  Files            16       16               
  Lines          1358     1358               
  Branches        160      160               
=============================================
+ Hits            601      819      +218     
+ Misses          689      460      -229     
- Partials         68       79       +11     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.