#6578768 Redirect successfully canceled Subscriptions to the Purchase List

Changes proposed in this Pull Request

When a subscription is successfully canceled from the account purchases list the canceled subscription’s page should redirect back to the Purchases list – BONUS – a green ‘success’ notice will appear in the upper right corner of the Purchases page to give a visual cue that the cancelation was successfully completed.

Alternatively, if the cancelation fails for some reason, the customer will remain on the Subscriptions purchase page and a red error notice will instruct them to Contact Support with a link to https://wordpress.com/help/contact

Testing instructions

Testing set up:

1. Properly sandbox the api, see PCYsg-lW4-p2 under Testing.
2. Go to P9LPZB-gd-p2 (edit page for password)
3. Sign up for a recurring payment, in this step you should see the sandbox Stripe cards on file as shown https://d.pr/i/NY5hww

Test 1:

• Now, go to https://wordpress.com/me/purchases and click on the new Subscription item, then cancel it.
• You should then be redirected back to the Purchases list with the following success notice

Success:

Test 2:

• Add a new subscription following step 3 above
• Go to the subscription’s purchase page where you see the option to cancel it – don’t cancel it.
• To trigger the failure notice, open React component tools in your dev tools window and follow the diagram below
• TLDR – > Search for the Subscription[Localized] component -> change the value for the stoppingStatus prop from false to “fail” (quotes, this is a string) and then press enter to trigger the notice

Fixes #49720