browser_xhr_onchange_leak.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

*/

// Bug 1336811 - An XHR that has a .onreadystatechange waiting should

// not leak forever once the tab is closed. CC optimizations need to be

// turned off once it is closed.

add_task(async function test() {

  // We need to reuse the content process when we navigate so the entire process

  // with the possible-leaking window doesn't get torn down.

  await SpecialPowers.pushPrefEnv({

    set: [["dom.ipc.keepProcessesAlive.webIsolated.perOrigin", 1]],

});

  const url =

    "http://mochi.test:8888/browser/dom/xhr/tests/browser_xhr_onchange_leak.html";

  let newTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);

  let browser = gBrowser.selectedBrowser;

  let pageShowPromise = BrowserTestUtils.waitForContentEvent(

    browser,

    "pageshow",

    true

);

  BrowserTestUtils.startLoadingURIString(browser, "http://mochi.test:8888/");

  await pageShowPromise;

  ok(pageShowPromise, "need to check something");

  BrowserTestUtils.removeTab(newTab);

});