Testing Maturity
Comprehensive automated testing with regulatory invariant validation. Every critical path is verified before deployment.
Testing Approach
Unit & Integration Separation
Clear separation between fast unit tests and comprehensive integration tests. Each layer validates specific behaviors.
Provider Stub Testing
All external provider interactions are tested against realistic stubs. No live API calls in test suites.
Regulatory Invariants
Critical financial rules are encoded as tests: quote expiry validation, no repricing after acceptance, idempotency guarantees.
Continuous Integration
Every commit triggers the full test suite. No code merges without passing tests and review approval.
What We Test
Transaction Flow Tests
- Quote creation and expiry
- Payment initiation
- Provider callback handling
- Balance updates
Security Tests
- Authentication flows
- Authorization checks
- Input validation
- Webhook signature verification
Edge Case Tests
- Provider timeout handling
- Duplicate webhook delivery
- Concurrent transaction attempts
- Currency precision
Regulatory Invariants
Critical financial rules that must never be violated are encoded as automated tests.
Quote Expiry Enforcement
Expired quotes cannot be executed. Exchange rates are locked only within validity window.
No Repricing After Acceptance
Once a user accepts a quote, the rate is immutable. No slippage or hidden fees.
Idempotency Guarantees
Duplicate requests produce identical results. No double charges or duplicate transfers.
Balance Consistency
Ledger entries always balance. Every debit has a corresponding credit.