promises-keep-request-alive.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script type="module">
import {PaymentRequestMock} from './resources/payment-request-mock.js';
var details = {
  total: {
    label: 'Total',
    amount: {currency: 'USD', value: '55.00'}, // US$55.00
  }
};

var response_data = {
  methodName: 'basic-card',
  stringifiedDetails: '{}',
  payer: {}
};

const paymentRequestMock = new PaymentRequestMock();

promise_test(async () => {
  await test_driver.bless();
  let result = new PaymentRequest([
      {'supportedMethods': ['basic-card']}
  ], details).show();
  gc();

  paymentRequestMock.onPaymentResponse(response_data);
  let response = await result;
  let completeResult = response.complete("success");

  response = null;
  gc();

  paymentRequestMock.onComplete();
  return completeResult;
}, 'Promises resolve even without references to request or response.');
</script>

chromium/third_party/blink/web_tests/wpt_internal/payments/promises-keep-request-alive.https.html