[TIME-TRAVEL] [TEST] Integration test for 'Step-by-Step' simulation flow

[dotandev]

Description

A full end-to-end test verifying Go/Rust bridge communication during a time-travel session.

Requirements

• Create tests/integration/time_travel_test.go.
• Run a real Soroban contract simulation with --snapshots.
• Programmatically 'Step' through the result and verify state snapshots.

Acceptance Criteria

• Simulation completes and returns valid snapshots.
• Step indices match the trace instruction offsets.

Estimated File Changes: 2 (tests/integration/time_travel_test.go, tests/fixtures/contracts/counter.rust)

[Miracle656]

@Miracle656 has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

Hi 👋

I’d like to take on this issue.

Approach:

• Create "tests/integration/time_travel_test.go" to cover the full end-to-end simulation flow

• Use a simple Soroban fixture contract (e.g., counter) in "tests/fixtures/contracts/counter.rust" to generate deterministic state transitions

• Run the simulation with "--snapshots" enabled and capture the execution trace

• Programmatically step through the trace:

  • Iterate over each step in the simulation result
  • Validate that snapshots are produced at each step
  • Ensure snapshot state reflects expected contract transitions

• Verify correctness:

  • Snapshot count aligns with executed instruction steps
  • Step indices match instruction offsets from the trace
  • Cross-check state consistency between steps

Test considerations:

• Ensure reproducibility with deterministic inputs
• Validate Go ↔ Rust bridge communication integrity
• Fail clearly on mismatched step indices or invalid snapshots

ETA: 2–3 days

Thanks!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Miracle656 to this issue.

[drips-wave]

Congratulations, @Miracle656! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Miracle656: 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

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🌊 Happy Wave 🌊

[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @Miracle656 as part of the Stellar Wave Program's 3rd Wave 🥳

Moderator's reason: [Auto-assessed] The contributor successfully implemented the requested integration tests and contract fixture. The PR was merged by maintainers and the implementation directly addresses the acceptance criteria defined in the issue.

😎 @Miracle656: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

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ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.