MessageEvent_onmessage_postMessage_infinite_loop.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /webmessaging/MessageEvent_onmessage_postMessage_infinite_loop.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

<title>MessageEvent: onmessage infinite loop</title>

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

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

</head>

<body>

<script>

'use strict';

// The test passes if the onmessage / postMessage loop does not prevent the

// step_timeout task from ever being run. In particular there should be no

// infinite loop or stack overflow.

async_test(function(t) {

  var channel = new MessageChannel();

  var count = 0;

  channel.port1.addEventListener("message", t.step_func(function() {

    count++;

    assert_less_than(count, 1000, "There were many message events without " +

                                  "t.step_timeout ever being called.");

  }));

  channel.port1.addEventListener("message", t.step_func(function() {

    channel.port2.postMessage(0);

  }));

  channel.port1.start();

  channel.port2.postMessage(0);

  t.step_timeout(function() { t.done(); }, 0);

}, "onmessage calling source postMessage");

</script>