Incremental updates

Click on each button in sequence from top to bottom without refreshing the page. Each button will bring up the Payment Request UI window.

Unless stated otherwise, each test will update some part of the displayed payment sheet in a manner indicated below. When prompted, please change or enter a new shipping address, look for the tested change, and complete the payment.

If the payment request locks up or otherwise aborts, the test has failed.

1. Passing an empty dictionary does not cause the sheet to change. No values in the sheet must change.