browser_test_simultaneous_normal_and_history_loads.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

add_task(async function test_normal_and_history_loads() {

  // This test is for the case when session history lives in the parent process.

  // BFCache is disabled to get more asynchronousness.

  await SpecialPowers.pushPrefEnv({

    set: [["fission.bfcacheInParent", false]],

});

  let testPage =

    getRootDirectory(gTestPath).replace(

      "chrome://mochitests/content",

      // eslint-disable-next-line @microsoft/sdl/no-insecure-url

      "http://example.com"

    ) + "blank.html";

  await BrowserTestUtils.withNewTab(

    { gBrowser, url: testPage },

    async function (browser) {

      for (let i = 0; i < 2; ++i) {

        BrowserTestUtils.startLoadingURIString(browser, testPage + "?" + i);

        await BrowserTestUtils.browserLoaded(browser);

      let sh = browser.browsingContext.sessionHistory;

      is(sh.count, 3, "Should have 3 entries in the session history.");

      is(sh.index, 2, "index should be 2");

      is(sh.requestedIndex, -1, "requestedIndex should be -1");

      // The following part is racy by definition. It is testing that

      // eventually requestedIndex should become -1 again.

      browser.browsingContext.goToIndex(1);

      let historyLoad = BrowserTestUtils.browserLoaded(browser);

      /* eslint-disable mozilla/no-arbitrary-setTimeout */

      await new Promise(r => {

        setTimeout(r, 10);

});

      browser.browsingContext.loadURI(

        Services.io.newURI(testPage + "?newload"),

          triggeringPrincipal: browser.nodePrincipal,

);

      let newLoad = BrowserTestUtils.browserLoaded(browser);

      // Note, the loads are racy.

      await historyLoad;

      await newLoad;

      is(sh.requestedIndex, -1, "requestedIndex should be -1");

      browser.browsingContext.goBack();

      await BrowserTestUtils.browserLoaded(browser);

      is(sh.requestedIndex, -1, "requestedIndex should be -1");

);

});