
PASS Must be possible to construct a payment request 
PASS Throws if the promise [[state]] is not "created" 
PASS If the user agent's "payment request is showing" boolean is true, then return a promise rejected with an "AbortError" DOMException. 
PASS If payment method consultation produces no supported method of payment, then return a promise rejected with a "NotSupportedError" DOMException. 
PASS If the user aborts the payment request algorithm, then return a promise rejected with an "AbortError" DOMException. 
PASS A request is updated when show()'s detail promise resolves. 
PASS Change events do not occur until show()'s detail promise resolves.