• Failed basic-card transaction
• Failed Google Pay transaction
• Failed BobPay transaction
• Timed out transaction
• Invalid completion status
• Show is called with a delay for basic-card, without a user gesture, so should be rejected.
• Show is called with a delay for Google Pay, without a user gesture, so should be rejected.
• Shipping address failures:
  • Merchant does not listen to shipping address change. This should not block UI when user changes shipping address.
  • Merchant listens to shipping address change, but does not call updateWith() on the change event. This should not block UI when user changes shipping address.
  • Timed out promise for address changes. The merchant calls updateWith(promise), but never resolves that promise. This should cancel payment request.
  • Respond to shipping address change with an empty dictionary.
  • Reject the promise for responding to address changes. This should cancel the payment request.
• show(promise) failures:
  • Reject the show(promise). This should cancel the payment request.
  • Timeout the show(promise). This should cancel the payment request.
  • Calling show(promise) for unsupported payment method identifier. This should cancel the payment request.
  • The show promise resolves with invalid payment details. This should cancel the payment request.