window.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /streams/transferable/window.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/helpers.js"></script>

<script>

'use strict';

promise_test(t => {

  const orig = createOriginalReadableStream();

  const promise = testMessageEvent(window);

  postMessage(orig, '*', [orig]);

  assert_true(orig.locked, 'the original stream should be locked');

  return promise;

}, 'window.postMessage should be able to transfer a ReadableStream');

promise_test(t => {

  const orig = createOriginalReadableStream();

  const mc = new MessageChannel();

  const promise = testMessageEvent(mc.port1);

  mc.port1.start();

  mc.port2.postMessage(orig, [orig]);

  mc.port2.close();

  assert_true(orig.locked, 'the original stream should be locked');

  return promise;

}, 'port.postMessage should be able to transfer a ReadableStream');

promise_test(t => {

  const orig = createOriginalReadableStream();

  const promise = new Promise(resolve => {

    addEventListener('message', t.step_func(evt => {

      const [rs1, rs2] = evt.data;

      assert_equals(rs1, rs2, 'both ReadableStreams should be the same object');

      resolve();

    }), {once: true});

});

  postMessage([orig, orig], '*', [orig]);

  return promise;

}, 'the same ReadableStream posted multiple times should arrive together');

const onloadPromise = new Promise(resolve => onload = resolve);

promise_test(() => {

  const orig = createOriginalReadableStream();

  const promise = testMessageEvent(window);

  return onloadPromise.then(() => {

    const echoIframe = document.querySelector('#echo');

    echoIframe.contentWindow.postMessage(orig, '*', [orig]);

    return promise;

});

}, 'transfer to and from an iframe should work');

</script>

<iframe id=echo src="resources/echo-iframe.html" style="display:none"></iframe>