[Test]: Stripe API integration tests

[manishapriya94]

Payment/Donation

User stories:

• Constituent pays a default of 1.00 (close to a forever stamp) which offsets the use of APIs like Lob, Stripe, and Cicero to mail the letter
• Constituent can select a donation amount to support their cause further
• A progress bar creates a visual incentive of the goal to support

QA
Files: In checkout.js for functions and checkout.test.js for tests

• Add tests for Payment Intents
  • Copilot prompt: How can I handle errors or exceptions in the payment intent logic?
• Add tests for server side code
  • Copilot prompt: How can I handle errors when making API requests in JavaScript?
• Add tests for Charges
  Copilot prompt: Create tests in jest for createCharge

Context:

Read more and find test cards

When using the Payment Intents API with Stripe’s client libraries and SDKs, ensure that:

• Authentication flows are triggered when required (use the regulatory test card numbers and PaymentMethods.)
  • No authentication (default U.S. card): 4242 4242 4242 4242.
  • Authentication required: 4000 0027 6000 3184.
• The PaymentIntent is created with an idempotency key to avoid erroneously creating duplicate PaymentIntents for the same purchase.
• Errors are caught and displayed properly in the UI.

Charges API
When using the Charges API with Stripe’s client libraries and SDKs, ensure that:

• The card Element is passed correctly to createToken in your submit handler.
• In the response handler for createToken, card errors are handled and displayed properly.
• Only valid tokens are passed to your server as part of payment form submission.

Server-side code
In your server-side code, ensure that:

• All requests are being made successfully. You may find it useful to view your account’s events and logs as you test your integration.
• All API errors are handled properly.
• Relevant webhooks are handled correctly.