test: cover pagination, rate limits, malformed XDR, RPC failures, and… - #788
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Nanle-code merged 1 commit intoJul 29, 2026
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… protocol-version changes deterministically
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Closes #784
Description: This PR addresses testing coverage gaps related to various edge cases and failure paths when interacting with the Stellar Horizon and Soroban RPC APIs. By utilizing Mock Service Worker (MSW), we introduce robust deterministic tests that simulate failure scenarios and ensure the application correctly handles these conditions.
Changes Included:
Pagination Parameters: Added tests to verify that fetchTransactions passes limit and cursor query parameters accurately to the Horizon API.
Rate Limits (429 Too Many Requests): Validates that the application appropriately bubbles up or handles API throttling errors.
Malformed XDR Submission: Mocks a 400 Bad Request from Horizon representing a transaction_malformed error (simulating an invalid XDR payload) to ensure graceful error surface.
RPC Failures (500 Internal Error): Ensures that a failure on a Soroban RPC node (e.g. 500 error) registers correctly when probing the network (sets node status to down).
Protocol-Version Changes: Validates that changes to the reported core or horizon protocol versions through the root Horizon endpoint are seamlessly handled by our network probe.
Testing Strategy: All tests run locally via MSW intercepts in stellar-api.spec.ts, mocking real-world boundary cases without actual network dependencies.