webusb/usbDevice-iframe.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/test-only-api.js"></script>
<script src="resources/fake-devices.js"></script>
<script src="resources/usb-helpers.js"></script>
<script>
'use strict';

async function sleep(timeout) {
  return new Promise(resolve => {
    step_timeout(() => {
      resolve();
    }, timeout);
  });
}

async function connectInIframe() {
  let iframe = document.createElement('iframe');
  let opened = false;

  iframe.src = 'resources/open-in-iframe.html';
  document.body.appendChild(iframe);

  await navigator.usb.test.attachToContext(iframe);
  function nextIFrameMessage() {
    return new Promise(resolve => window.addEventListener(
        'message', e => resolve(e.data)));
  }
  iframe.contentWindow.postMessage('ConnectEvent', '*');

  assert_equals('Ready', (await nextIFrameMessage()));
  let fakeDevice = navigator.usb.test.addFakeDevice(fakeDeviceInit);
  let closedPromise = new Promise(resolve => fakeDevice.onclose = resolve)
      .then(() => assert_true(opened));

  assert_equals('Success', (await nextIFrameMessage()));
  opened = true;
  return { iframe, closedPromise };
}

usb_test(async () => {
  let { iframe, closedPromise } = await connectInIframe();
  document.body.removeChild(iframe);
  await closedPromise;
}, 'detaching iframe disconnects device.');

usb_test(async () => {
  let { iframe, closedPromise } = await connectInIframe();
  iframe.src = 'about:blank';
  await closedPromise;
}, 'navigating iframe disconnects device.');

usb_test(async (t) => {
  let iframe = document.createElement('iframe');
  iframe.src = 'resources/open-in-iframe.html';
  iframe.allow = 'usb \'none\'';

  await Promise.all([
    new Promise(resolve => {
      document.body.appendChild(iframe);
      iframe.addEventListener('load', resolve);
    }),
    // This will wait for ReadyForAttachment event from iframe loading.
    navigator.usb.test.attachToContext(iframe),
  ]);

  let messageWatcher = new EventWatcher(t, window, 'message');
  iframe.contentWindow.postMessage('ConnectEvent', '*');
  let messageEvent = await messageWatcher.wait_for('message');
  assert_equals(messageEvent.data, 'Ready');

  // This isn't necessary as the expected scenario shouldn't send any mojo
  // request. However, in order to capture a bug that doesn't reject adding
  // event listener, time delay here is to allow mojo request to be intercepted
  // after iframe adding connect event listener.
  await sleep(100);

  // If device connect event fires, EventWatcher will assert for an unexpected
  // event.
  navigator.usb.test.addFakeDevice(fakeDeviceInit);
  // Time delay here is to allow event to be fired if any.
  await sleep(100);
}, 'Connect event is not fired in iframe with usb disallowed.');

</script>