browser_1284886_suspend_tab.js

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/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

add_task(async function test() {

  await SpecialPowers.pushPrefEnv({

    set: [["dom.require_user_interaction_for_beforeunload", false]],

});

  let url = "about:robots";

  let tab0 = gBrowser.tabs[0];

  let tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);

  const staleAttributes = [

    "activemedia-blocked",

    "busy",

    "pendingicon",

    "progress",

    "soundplaying",

];

  for (let attr of staleAttributes) {

    tab0.toggleAttribute(attr, true);

  gBrowser.discardBrowser(tab0);

  ok(!tab0.linkedPanel, "tab0 is suspended");

  for (let attr of staleAttributes) {

ok(

      !tab0.hasAttribute(attr),

      `discarding browser removes "${attr}" tab attribute`

);

  await BrowserTestUtils.switchTab(gBrowser, tab0);

  ok(tab0.linkedPanel, "selecting tab unsuspends it");

  // Test that active tab is not able to be suspended.

  gBrowser.discardBrowser(tab0);

  ok(tab0.linkedPanel, "active tab is not able to be suspended");

  // Test that tab that is closing is not able to be suspended.

  gBrowser._beginRemoveTab(tab1);

  gBrowser.discardBrowser(tab1);

  ok(tab1.linkedPanel, "cannot suspend a tab that is closing");

  gBrowser._endRemoveTab(tab1);

  // Open tab containing a page which has a beforeunload handler which shows a prompt.

  url =

    "http://example.com/browser/browser/components/sessionstore/test/browser_1284886_suspend_tab.html";

  tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);

  await BrowserTestUtils.switchTab(gBrowser, tab0);

  // Test that tab with beforeunload handler which would show a prompt cannot be suspended.

  gBrowser.discardBrowser(tab1);

ok(

    tab1.linkedPanel,

    "cannot suspend a tab with beforeunload handler which would show a prompt"

);

  // Test that tab with beforeunload handler which would show a prompt will be suspended if forced.

  gBrowser.discardBrowser(tab1, true);

ok(

    !tab1.linkedPanel,

    "force suspending a tab with beforeunload handler which would show a prompt"

);

  BrowserTestUtils.removeTab(tab1);

  // Open tab containing a page which has a beforeunload handler which does not show a prompt.

  url =

    "http://example.com/browser/browser/components/sessionstore/test/browser_1284886_suspend_tab_2.html";

  tab1 = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);

  await BrowserTestUtils.switchTab(gBrowser, tab0);

  // Test that tab with beforeunload handler which would not show a prompt can be suspended.

  gBrowser.discardBrowser(tab1);

ok(

    !tab1.linkedPanel,

    "can suspend a tab with beforeunload handler which would not show a prompt"

);

  BrowserTestUtils.removeTab(tab1);

  // Test that non-remote tab is not able to be suspended.

  url = "about:robots";

  tab1 = BrowserTestUtils.addTab(gBrowser, url, { forceNotRemote: true });

  await promiseBrowserLoaded(tab1.linkedBrowser, true, url);

  await BrowserTestUtils.switchTab(gBrowser, tab1);

  await BrowserTestUtils.switchTab(gBrowser, tab0);

  gBrowser.discardBrowser(tab1);

  ok(tab1.linkedPanel, "cannot suspend a remote tab");

  BrowserTestUtils.removeTab(tab1);

});