Add Unit Tests for Wager and Fee Edge Cases

[popsman01]

Description
Cover exact minimum wager, exact maximum wager, zero reserves, and fee boundary values with focused unit tests.

Motivation
Tests are the primary safety net for the Tossd contract. Without coverage for this area, regressions can go undetected and break game fairness or fund safety guarantees.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Primary files: Tossd-contract/src/lib.rs

Proposed Solution
Complete the following in a focused PR off feature/unit-edge-cases:

• Write focused unit tests for spec boundaries
• Keep tests isolated and readable
• Document what each edge case protects

Technical Implementation

Files to modify:

• coinflip-contract/src/lib.rs

Implementation steps:

• Write focused unit tests for spec boundaries
• Keep tests isolated and readable
• Document what each edge case protects

Branch: feature/unit-edge-cases

Example commit message

test: add unit coverage for wager reserve and fee edges

Acceptance Criteria

• Run tests
• Cover edge cases
• Include test output and boundary notes

Guidelines

• Assignment required before starting
• PR description must include: Closes #155

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 200 Points.

🧑‍💻 Interested in contributing? Apply to work on this issue on Drips Wave, earn points, and receive rewards.

Warning

Only applications submitted via the apply link above will be considered. Please do not apply by commenting on the issue or opening a PR directly.

🤠 Repo maintainers: You can manage this issue's Points and Complexity on your Maintainer Dashboard here. Please keep an eye on applications and respond quickly 💙

ℹ️ Learn more about Drips Wave

[Dayz-tech-co]

@Dayz-tech-co has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hi, I’d like to take this on.

I have experience writing Rust smart contract tests. I can add focused unit tests covering minimum/maximum wagers, zero reserves, and fee boundaries, keeping tests isolated, documented, and easy to review.

Happy to get started

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Dayz-tech-co to this issue.