test_startup_pinned_tabs_no_savedgroups.js

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/* Any copyright is dedicated to the Public Domain.

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

/*

 * Bug 2083187: session files written by Firefox 132 and earlier have no

 * savedGroups property. SessionStartup's idle callback that records the

 * pinned-tab count must not throw on such a file, so that

 * browser.engagement.max_concurrent_tab_pinned_count is still recorded.

*/

"use strict";

do_get_profile();

const { SessionFile } = ChromeUtils.importESModule(

  "moz-src:///browser/components/sessionstore/SessionFile.sys.mjs"

);

// One window with a single pinned tab, and no savedGroups property.

const LEGACY_SESSION = JSON.stringify({

  version: ["sessionrestore", 1],

  windows: [

      tabs: [{ entries: [{ url: "about:blank" }], pinned: true }],

      selected: 1,

},

],

});

add_task(async function test_pinned_tab_count_without_savedGroups() {

  Services.fog.testResetFOG();

  await IOUtils.writeUTF8(SessionFile.Paths.clean, LEGACY_SESSION, {

    compress: true,

});

  await new Promise(resolve => afterSessionStartupInitialization(resolve));

  // SessionStartup records the count from an idle dispatch; queue one behind

  // it so the assertion runs after that callback.

  await new Promise(resolve => Services.tm.idleDispatchToMainThread(resolve));

  Assert.equal(

    Glean.browserEngagement.maxConcurrentTabPinnedCount.testGetValue(),

1,

    "one pinned tab was counted from a session file without savedGroups"

);

});