test: increase coverage for convert.py to 95% with edge case tests

[theanand108]

Summary

This PR improves test coverage for convert.py to meet the required 95% threshold by adding targeted edge-case tests and covering previously untested execution paths.

Changes

• Added tests for PDF conversion flows (LibreOffice success/failure and docx2pdf fallback)
• Covered YAML parsing error scenarios
• Improved coverage for template resolution logic
• Added tests for mapping and replacement edge cases
• Covered error handling paths (e.g., invalid inputs, missing files)

Result

• convert.py coverage increased to ≥95%
• All tests pass locally
• No linting issues introduced

AI Disclosure

Some test scaffolding and edge-case ideas were assisted by AI tools, but all logic, validation, and debugging were reviewed and verified manually.

Affirmation

I confirm that I have followed the OWASP contribution guidelines and tested all changes locally.

Next Steps

Continue improving coverage for remaining modules (e.g., capec_map_enricher.py) to further strengthen test reliability.

[sydseter]

@theanand108 you need to format the files.

[theanand108]

Thanks for pointing that out. I’ve applied black formatting and pushed the changes. Please take another look.

[sydseter]

@theanand108 Fantastic. Very nice.

[theanand108]

Thanks, Johan. Glad to help! I’ll continue working on improving coverage further.