browser_allocations_browser_console.js

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/* Any copyright is dedicated to the Public Domain.

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

"use strict";

// Record allocations while opening and closing the Browser Console

const TEST_URL =

  "http://example.com/browser/devtools/client/framework/test/allocations/reloaded-page.html";

const { require } = ChromeUtils.importESModule(

  "resource://devtools/shared/loader/Loader.sys.mjs"

);

const {

  BrowserConsoleManager,

} = require("resource://devtools/client/webconsole/browser-console-manager.js");

async function testScript() {

  // Open

  await BrowserConsoleManager.toggleBrowserConsole();

  // Reload the tab to make the test slightly more real

  const hud = BrowserConsoleManager.getBrowserConsole();

  const onTargetProcessed = hud.commands.targetCommand.once(

    "processed-available-target"

);

  gBrowser.reloadTab(gBrowser.selectedTab);

  info("Wait for target of the new document to be fully processed");

  await onTargetProcessed;

  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout

  await new Promise(resolve => setTimeout(resolve, 1000));

  // Close

  await BrowserConsoleManager.toggleBrowserConsole();

  // Browser console still cleanup stuff after the resolution of toggleBrowserConsole.

  // So wait for a little while to ensure it completes all cleanups.

  // eslint-disable-next-line mozilla/no-arbitrary-setTimeout

  await new Promise(resolve => setTimeout(resolve, 500));

add_task(async function () {

  await SpecialPowers.pushPrefEnv({

    set: [["devtools.browsertoolbox.scope", "everything"]],

});

  const tab = await addTab(TEST_URL);

  // Run the test scenario first before recording in order to load all the

  // modules. Otherwise they get reported as "still allocated" objects,

  // whereas we do expect them to be kept in memory as they are loaded via

  // the main DevTools loader, which keeps the module loaded until the

  // shutdown of Firefox

  await testScript();

  // Now, run the test script. This time, we record this run.

  await startRecordingAllocations();

  for (let i = 0; i < 3; i++) {

    await testScript();

  await stopRecordingAllocations("browser-console");

  gBrowser.removeTab(tab);

});