Build Stellar DEX Order Book Snapshot Tests for Price Feed Validation

[temma02]

Description

Implement order book snapshot tests that validate the DEX price feed logic correctly interprets Stellar order book data and computes accurate prices across various market conditions.

Requirements and Context

• Correctness: Price computation must be accurate for all order book states
• Testing: Test price computation against order book snapshots
• Documentation: Document the price computation logic

Suggested Execution

Branch: feat/issue-091-stellar-dex-orderbook-tests

Implement Changes

• Create order book snapshot fixtures for various market conditions (thin, deep, empty)
• Add tests validating price computation against each snapshot
• Test edge cases: empty order book, single-sided book, crossed book
• Assert price accuracy within an acceptable tolerance

Test and Commit

• Cover thin, deep, empty, and crossed order book scenarios
• Assert accurate price computation for each
• Document the price computation logic

Example Commit Message

feat(stellar): add DEX order book snapshot tests for price feed validation

- Create order book fixtures for various market conditions
- Validate price computation against each snapshot
- Test empty, single-sided, and crossed book edge cases

Guidelines

• Use realistic order book fixtures matching Horizon's format
• Test edge cases explicitly
• Assert prices within a defined tolerance

[Markodiba6399]

@Markodiba6399 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like work on this issue

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[drips-wave]

Congratulations, @Markodiba6399! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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