Amazon Pay ECE: Subscription - Pre-order Upfront product compatibility

[hsingyuc]

Objective
If Amazon Pay express checkout is enabled and supported, shoppers should be able to use Amazon Pay to complete a successful purchase with Subscription - Pre-order Upfront products. We are getting an error The provided setup_future_usage (off_session) does not match the setup_future_usage from the provided confirmation_token (null). Try confirming with a Payment Intent that is configured to use the same parameters as the ConfirmationToken from /checkout.

Acceptance criteria

When Amazon Pay express checkout is enabled and supported:

• customers should be charged upfront for the pre-order subscription product, and the subscription should be created with the specified pre-order availability date.
• The subscription status should be "Pre-order".
• The pre-order should be active.
• Customers should be able to see subscription and pre-order details in the "My Account" section.
• The subscription renewal dates should be as per subscription settings.
• Subscription Next payment date should be displayed after the pre-order get completed
• Customers and merchants should receive an appropriate email regarding their pre-order subscription.
• The next subscription renewal payment date should be displayed after the pre-order gets completed
• Same for the Variable Subscription - Upfront product

Others

• No regression for other pages, e.g. block cart, block checkout, etc.
• No regression for other express checkout methods.
• Relevant documentation have been added or updated.

To reproduce:

1. With the feature flag off -- this is the default -- verify that Amazon Pay is not available in Stripe settings or in any store page.
2. Turn the feature flag on, by setting the _wcstripe_feature_amazon_pay option to yes. OR return 'yes' here
3. Verify that Amazon Pay is now available in Stripe settings.
4. Goto Woocommerce > products > Create a Subscription Product ( or Variable Subscription product )
5. Navigate the pre-order tab and enable pre-order
6. Add pre-order availability date
7. Select when to charge > upfront product
8. Go to the shop page and check out with Amazon Pay

Notes

• To create an Amazon Pay Sandbox test buyer account, which you will need for testing and development:
  1. Go to https://docs.stripe.com/elements/express-checkout-element in an incognito browser, or while logged out of your real Amazon account.
  2. If you see the Amazon Pay payment button, click it and create an account.
  • https://developer.amazon.com/docs/amazon-pay-checkout/amazon-pay-sandbox-accounts.html (See option 2.)

[hsingyuc]

I'm closing this issue because I can't reproduce it anymore.

[hsingyuc]

I can reproduce the issue while testing Variable Subscription - Pre-order Upfront product