PDF Gen - Update tests for helper functions in utils (exclude rendering methods)

This is for CI CD work.
Test all Enums and helper functions in the utils file.

**TODOs**
- [ ] Figure out all required unit tests
- [ ] Add/Update required tests
- [ ] Run `make test` to make sure all the unit tests work as expected

Locate the PDF Gen utils file and identify its enums and helper functions, excluding rendering methods. Review the existing unit tests to determine the missing coverage, add or update the required tests, and run `make test` to verify the suite passes.

Written by the indexing model from the issue text.