How do you verify a web application's payment gateway integration functions correctly?
Short Answer
Payment gateway integration verification involves testing transaction flows in a sandbox environment, validating API responses, and confirming correct data handling between the application and payment processor.
Why This Matters
This testing simulates real payment scenarios without actual financial transactions. It checks API endpoints, webhook handling, error responses, and data synchronization. Proper verification ensures the application correctly processes payments, handles declines, and maintains transaction integrity.
Where This Changes
Verification scope depends on gateway complexity and application requirements. Some integrations may require PCI compliance testing or third-party certification. Testing limitations exist for edge cases like network timeouts or processor-specific error conditions.
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