1<!DOCTYPE html>
2<meta charset="utf-8">
3<script src="/resources/testharness.js"></script>
4<script src="/resources/testharnessreport.js"></script>
5<script src="resources/helpers.js"></script>
6<script>
7'use strict';
8
9promise_test(t => {
10  const orig = createOriginalReadableStream();
11  const promise = testMessageEvent(window);
12  postMessage(orig, '*', [orig]);
13  assert_true(orig.locked, 'the original stream should be locked');
14  return promise;
15}, 'window.postMessage should be able to transfer a ReadableStream');
16
17promise_test(t => {
18  const orig = createOriginalReadableStream();
19  const mc = new MessageChannel();
20  const promise = testMessageEvent(mc.port1);
21  mc.port1.start();
22
23  mc.port2.postMessage(orig, [orig]);
24  mc.port2.close();
25  assert_true(orig.locked, 'the original stream should be locked');
26  return promise;
27}, 'port.postMessage should be able to transfer a ReadableStream');
28
29promise_test(t => {
30  const orig = createOriginalReadableStream();
31  const promise = new Promise(resolve => {
32    addEventListener('message', t.step_func(evt => {
33      const [rs1, rs2] = evt.data;
34      assert_equals(rs1, rs2, 'both ReadableStreams should be the same object');
35      resolve();
36    }), {once: true});
37  });
38  postMessage([orig, orig], '*', [orig]);
39  return promise;
40}, 'the same ReadableStream posted multiple times should arrive together');
41
42const onloadPromise = new Promise(resolve => onload = resolve);
43
44promise_test(() => {
45  const orig = createOriginalReadableStream();
46  const promise = testMessageEvent(window);
47  return onloadPromise.then(() => {
48    const echoIframe = document.querySelector('#echo');
49    echoIframe.contentWindow.postMessage(orig, '*', [orig]);
50    return promise;
51  });
52}, 'transfer to and from an iframe should work');
53</script>
54
55<iframe id=echo src="resources/echo-iframe.html" style="display:none"></iframe>
56