Test Subscription Edge Cases

[Abd-Standard]

Description
Expand test coverage to include unusual subscription scenarios such as duplicate requests and invalid channel IDs. Ensure reliable behavior.

Acceptance Criteria
Duplicate subscriptions are tested.
Invalid inputs are tested.
Boundary cases are covered.

[MissBlue00]

@MissBlue00 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer, can I be assigned to handle this task?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @MissBlue00 to this issue.

[Osuochasam]

@Osuochasam has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Dear maintainer, pls assign me this issue

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

[drips-wave]

Congratulations, @Osuochasam! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Osuochasam: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊