Increase Smart Contract Test Coverage

[Abd-Standard]

Description
Expand the existing smart contract test suite to cover edge cases and failure scenarios. Improve confidence in contract behavior.

Acceptance Criteria
New test cases are added.
Edge cases are covered.
Test suite passes successfully.

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Hello Maintainer,
I’d love to work on this issue. I'm a software developer with 5 years of experience and I’m confident I can deliver a good solution. Please feel free to assign it to me.

[NEA-DEV-coder]

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

I would like to resolve this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @NEA-DEV-coder to this issue.

[CollinsC1O]

@CollinsC1O has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this issue, kindly assign please

ℹ️ Repo Maintainers: To accept this application, review their application or assign @CollinsC1O to this issue.

[drips-wave]

Congratulations, @CollinsC1O! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @CollinsC1O: 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.

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