. Add unit test for error messages

[DeFiVC]

What: Add unit tests that verify error messages are descriptive and correct.

Why: Error messages help developers debug issues. Tests must verify messages are accurate.

Scope: Create test that: triggers each error condition, verifies error message contains expected text, verifies error type is correct.

Acceptance criteria:

• Error messages are descriptive
• Error types are correct
• Messages contain relevant info
• Tests cover all error paths

Technical context: tests/unit/ — existing unit tests.

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[gospeltout]

@gospeltout has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’d like to work on this issue
I have experience with relevant tech stack and I’ve reviewed the issue description and acceptance criteria, and I’m confident in delivering a clean, tested solution.
Please kindly assign.

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[webdevayo]

@webdevayo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I'm a full-stack developer and I'd like to take this issue.
I understand the requirements and will follow the existing project structure, keep the implementation clean, and include proper tests where applicable.

ETA: 1–3 days (depending on scope

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[Adamsonoladipupo]

@Adamsonoladipupo has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to solve this issue. Can you please assign it to me?

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[alfeedrips]

@alfeedrips has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Can I work on this task?

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[drips-wave]

Congratulations, @alfeedrips! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @alfeedrips: 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.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@alfeedrips's PR #382 was approved and merged by @DeFiVC.

🏆 @alfeedrips: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (557 total points). Track your full progress on GrantFox.

👏 Great work, @alfeedrips! Keep contributing to ChainLearnOfficial.

[drips-wave]

This issue has been completed by @alfeedrips as part of the Stellar Wave Program's 8th Wave 🥳

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