Improve code coverage from 13.9% to 100%

[Copilot]

• Add comprehensive tests to achieve 100% code coverage
• Fix linting errors for unused parameters in test files

Linting Fixes Applied

Fixed 7 unused parameter warnings by renaming unused u parameters to _ in:

• helpers_test.go: 2 factory function parameters
• registry_test.go: 5 factory function parameters

All tests continue to pass with 100% code coverage maintained. The linter now passes cleanly with no errors.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.

[ziflex]

@copilot fix the following listing errors:

Run $(go env GOPATH)/bin/revive -config revive.toml -formatter stylish -exclude ./vendor/... ./...
helpers_test.go
  (14, 19)  https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  
  (37, 19)  https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  

registry_test.go
  (44, 18)   https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  
  (58, 18)   https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  
  (78, 18)   https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  
  (112, 18)  https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  
  (130, 18)  https://revive.run/r#unused-parameter  parameter 'u' seems to be unused, consider removing or renaming it as _  

[Copilot]

@copilot fix the following listing errors:

...

Fixed all 7 linting errors by renaming unused parameters from u to _ in both helpers_test.go and registry_test.go. The linter now passes cleanly with no errors. Commit d39d1c0