test: improve JwtService test coverage with additional test cases.

[RomanoHeur]

…ests

Pull Request

Description

This PR improves the test coverage of the JwtService class by adding additional unit tests and improving existing ones.
Closes #867

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[vercel]

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[github-actions]

Hi @RomanoHeur, thanks for contributing to Nyay Setu! 🎉

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[viru0909-dev]

Requires Changes. Please address the following issues:

• Title is not following the conventional commits format (e.g. 'feat: ...', 'fix: ...').

[RomanoHeur]

@viru0909-dev Thanks for your reply. I have updated the PR title to the conventional commit format.

[viru0909-dev]

Review Summary

This PR has been reviewed and requires changes before it can be approved. The issues below must be resolved.

Issues to Resolve

Result	Check	Notes
FAIL	Checklist	4 checklist item(s) are still unchecked. Complete all items before submitting for review.
FAIL	Code Quality	1 critical code issue(s) and 0 warning(s) found in the diff. Critical issues must be resolved before this PR can be approved.

Passing Checks

Result	Check	Notes
PASS	Title	Title format is acceptable.
PASS	Description	Description is complete and well-structured.
PASS	Issue Link	Issue is linked with a closing keyword.
PASS	Merge Conflicts	Conflict status is not yet computed by GitHub — skipping.
PASS	Branch Freshness	Branch was last updated 2.5 days ago.
PASS	CI / Tests	No CI checks are configured or results are not yet available.

Code Review — Line-by-Line Findings

[ERROR] backend/nyaysetu-backend/src/test/java/com/nyaysetu/backend/service/JwtServiceTest.java — line 59

String malformedToken = "this.is.not.a.valid.jwt";
Possible hardcoded credential or secret detected.

[INFO] backend/nyaysetu-backend/src/test/java/com/nyaysetu/backend/service/JwtServiceTest.java — line 99

.setExpiration(new Date(System.currentTimeMillis() + 60000))
Large magic number detected — consider a named constant.

---

To proceed: push the required fixes to feat/improve-jwt-service-unit-test and the PR will be re-evaluated on the next review run.

[RomanoHeur]

@viru0909-dev Thanks for the review. I've addressed all the changes:

• Removed the flagged hardcoded token patterns.
• Replaced magic numbers with named constants
• Updated the pull request description and checklist fomatting