test_bcg_processes.html

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<!DOCTYPE HTML>

<html>

<head>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

</head>

<body>

<script type="application/javascript">

"use strict";

add_task(async function main_test() {

  await SpecialPowers.pushPrefEnv({

    set: [["dom.ipc.processCount.webIsolated", 10]],

});

  let frame1 = document.createElement("iframe");

  frame1.src = "http://example.com";

  document.body.appendChild(frame1);

  await new Promise(resolve => {

    frame1.addEventListener("load", resolve, { once: true })

});

  info("frame 1 loaded");

  let frame2 = document.createElement("iframe");

  frame2.src = "http://example.com";

  document.body.appendChild(frame2);

  await new Promise(resolve => {

    frame2.addEventListener("load", resolve, { once: true })

});

  info("frame 2 loaded");

  let id1 = await SpecialPowers.spawn(frame1, [], () => {

    return ChromeUtils.domProcessChild.childId;

});

  let id2 = await SpecialPowers.spawn(frame2, [], () => {

    return ChromeUtils.domProcessChild.childId;

});

  is(id1, id2, "childID for example.com subframes should match");

});

</script>

</body>

</html>