[Testing] Increase Coverage for Notification Validation Rules

[Abd-Standard]

Description

Expand automated tests around payload validation logic.

Acceptance Criteria
Invalid payloads are tested.
Edge cases are covered.
Coverage percentage increases.

[AnnieIj]

Hi maintainer, I would love to work on this issue. I promise to deliver greatly. Thanks

[SharifIbrahimDev]

Hi, I'd like to work on this issue.

I have experience writing automated tests and improving validation layers to ensure reliability and maintainability. I can expand the existing test suite around notification payload validation by covering invalid inputs, boundary conditions, missing required fields, malformed payloads, and other edge cases that could lead to unexpected behavior.

I will review the current validation rules, add comprehensive test cases, and ensure that failure scenarios are properly asserted. My goal is to improve confidence in the validation logic while increasing overall coverage and preventing regressions in future changes.

I will deliver a clean and maintainable test suite that satisfies the acceptance criteria and strengthens the quality of the notification system.

[Menjay7]

Hi! I came across this issue and would love to work on it. I have experience with similar tasks and I'm confident I can investigate, implement a clean solution, and thoroughly test it before submitting a PR. If the issue is still open, I would appreciate it if you could assign it to me. Thank you!

[oche2920]

Hi maintainer i can work on this, I'll make sure to work on the issue asap

[grantfox-oss]

🦊 GrantFox — @oche2920 has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #102)
2. Your PR will be reviewed by the Core-Foundry maintainers

Good luck! Track your progress on GrantFox.

[Marvy247]

@Marvy247 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, I've reviewed the issue description, and I'm confident I can implement all the requested details smoothly.​ Please assign this issue to me! I can have a PR ready for review in a few hours. Thank You.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Marvy247 to this issue.

[ScriptedBro]

@ScriptedBro has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, I would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ScriptedBro to this issue.