API: Stripe Payment Synthetic Testing

  Property: ChurchWiseAI   Category: API / Integration Tier: all Persona: payments-engineer Touchpoint: /api/stripe/*, Stripe API

Preconditions

• Stripe test mode configured
• Test API keys available

Steps

#	Action	Expected Result
1	Test successful payment (test card 4242 4242 4242 4242)	Payment succeeds. Stripe returns successful status. Webhook fired.
2	Test declined card (4000 0000 0000 0002)	Payment fails. Checkout shows error to user. No duplicate charges.
3	Verify webhook delivery on success	checkout.session.completed webhook received within 2 seconds. Processed correctly.
4	Test webhook retry (simulate missed webhook)	Resending webhook is processed correctly. No duplicate provisioning.
5	Test customer subscription creation	Stripe customer created. Initial payment charged. Subscription active.
6	Test subscription renewal	At renewal date, customer charged. New billing cycle starts.
7	Test customer cancellation	Subscription canceled. No further charges. Chatbot disabled.
8	Verify payment amounts match pricing	Starter Chat $14.95, Pro Both $79.95 in test payments. No mismatches.

Known Failure Modes

• Successful payment doesn't trigger webhook — business logic skipped
• Webhook processed twice — duplicate provisioning
• Wrong amount charged — billing error
• Subscription renewal fails silently — customer churn

References

• Playwright spec: e2e (Stripe validation)
• Code files:
  • src/app/api/stripe/webhook/route.ts
  • src/lib/stripe-webhook-handler.ts
  • src/lib/subscription-manager.ts

Notes

Synthetic payment testing using Stripe test cards. Tests both success and failure paths. Critical for catching revenue leaks (missed webhooks, duplicate charges, wrong amounts). Run before each release that touches checkout or subscription logic. Must verify webhook delivery and idempotency.