test_current_inner_window.html

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<!DOCTYPE html>

<html>

<head>

  <meta charset="utf-8">

  <title>Test that current inner window checks are correct after navigations/discards</title>

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

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

</head>

<body>

<iframe id="frame"></iframe>

<script type="application/javascript">

"use strict";

const TEST_FILE = "file_current_inner_window.html";

const BASE_PATH = location.pathname.replace(/[^\/]+$/, "");

let frame = document.getElementById("frame");

function loadInFrame(url) {

  return new Promise(resolve => {

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

    frame.contentWindow.location = url;

});

add_task(async function() {

  await loadInFrame(TEST_FILE);

  // Store the check function from the window before we navigate. After that,

  // its bare word property accesses will continue referring to the same inner

  // window no matter how many times the frame navigates.

  let check1 = frame.contentWindow.isCurrentWinnerWindow;

  ok(check1(),

     "Initial inner window should be current before we navigate away");

  await loadInFrame(`http://example.com/${BASE_PATH}/${TEST_FILE}`);

  ok(!check1(),

     "Initial inner window should no longer be current after we navigate away");

  await SpecialPowers.spawn(frame, [], () => {

    Assert.ok(this.content.wrappedJSObject.isCurrentWinnerWindow(),

              "Remote inner window should be current after before we navigate away");

});

  await loadInFrame(TEST_FILE);

  ok(!check1(),

     "Initial inner window should still not be current after we back to current process");

  let check2 = frame.contentWindow.isCurrentWinnerWindow;

  ok(check2(),

     "Second in-process inner window should be current before we remove the frame");

  frame.remove();

  ok(!check1(),

     "Initial inner window should still not be current after we remove the frame");

  ok(check2(),

     "Second in-process inner window should still be current after we remove the frame");

});

</script>

</body>

</html>