browser_purge_shistory_keeps_current.js

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"use strict";

const PATH = "/browser/docshell/test/browser/dummy_page.html";

const URL_COM = "https://example.com" + PATH;

const URL_ORG = "https://example.org" + PATH;

const URL_ORG_A = URL_ORG + "#a";

const URL_NET = "https://example.net" + PATH;

const URL_IFRAME =

  "https://example.com/browser/docshell/test/browser/dummy_iframe_page.html";

add_task(async function purge_keeps_current_without_hang() {

  await SpecialPowers.pushPrefEnv({

    set: [["dom.navigation.webidl.enabled", true]],

});

  const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, URL_COM);

  const browser = tab.linkedBrowser;

  for (const url of [URL_ORG, URL_NET]) {

    const loaded = BrowserTestUtils.browserLoaded(browser, false, url);

    BrowserTestUtils.startLoadingURIString(browser, url);

    await loaded;

  const sh = browser.browsingContext.sessionHistory;

  await TestUtils.waitForCondition(() => sh.count == 3);

  is(sh.index, 2, "on the last entry");

  browser.goBack();

  await TestUtils.waitForCondition(() => sh.index == 1, "went back one entry");

  browser.purgeSessionHistory();

  await TestUtils.waitForCondition(() => sh.count < 3, "history was purged");

  Assert.greaterOrEqual(sh.count, 1, "the current entry was kept");

is(

    sh.getEntryAtIndex(sh.index).URI.spec,

    URL_ORG,

    "kept the page the user was viewing"

);

  BrowserTestUtils.removeTab(tab);

});

add_task(async function purge_with_subframe_does_not_hang() {

  await SpecialPowers.pushPrefEnv({

    set: [["dom.navigation.webidl.enabled", true]],

});

  const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, URL_IFRAME);

  const browser = tab.linkedBrowser;

  const loaded = BrowserTestUtils.browserLoaded(browser, false, URL_COM);

  BrowserTestUtils.startLoadingURIString(browser, URL_COM);

  await loaded;

  const sh = browser.browsingContext.sessionHistory;

  await TestUtils.waitForCondition(() => sh.count == 2);

  // Go back so the subframed page is the current, non-last entry. Purging then

  // duplicates its top-level entry via addEntry, and the subframe walk in the

  // history commit used to loop forever on that duplicate.

  browser.goBack();

  await TestUtils.waitForCondition(

    () => sh.index == 0,

    "back on the subframed page"

);

  browser.purgeSessionHistory();

  await TestUtils.waitForCondition(() => sh.count == 1, "history was purged");

  ok(true, "purge with a subframe completed without hanging");

  BrowserTestUtils.removeTab(tab);

});