browser_console_eager_eval_resolve.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

// Check evaluating eager-evaluation values.

const TEST_URI = "data:text/html;charset=utf8,<!DOCTYPE html>";

add_task(async function () {

  await addTab(TEST_URI);

  await pushPref("devtools.chrome.enabled", true);

  info("Open the Browser Console");

  const hud = await BrowserConsoleManager.toggleBrowserConsole();

  await executeResolveHookWithSideEffect(hud);

});

async function executeResolveHookWithSideEffect(hud) {

  // Services.droppedLinkHandler is implemented with resolve hook, which imports

  // ContentAreaDropListener.sys.mjs.

//

  // In order to test the resolve hook behavior, ensure the module is not yet

  // loaded, which ensures the property is not yet resolved.

//

  // NOTE: This test is not compatible with verify mode, given it depends on the

  //       initial state of the Services object and the module.

is(

    Cu.isESModuleLoaded(

      "resource://gre/modules/ContentAreaDropListener.sys.mjs"

),

    false

);

  setInputValue(hud, `Services.droppedLinkHandler`);

  await wait(500);

  // Eager evaluation should fail, due to the side effect in the resolve hook.

  await waitForEagerEvaluationResult(hud, "");

  setInputValue(hud, "");

  await wait(500);

  // The property should be resolved when evaluating after the eager evaluation.

  await executeAndWaitForResultMessage(

    hud,

    `Services.droppedLinkHandler;`,

    "XPCWrappedNative_NoHelper"

);

is(

    Cu.isESModuleLoaded(

      "resource://gre/modules/ContentAreaDropListener.sys.mjs"

),

    true

);

  // Eager evaluation should work after the property is resolved.

  setInputValue(hud, `Services.droppedLinkHandler`);

  await wait(500);

  await waitForEagerEvaluationResult(hud, /XPCWrappedNative_NoHelper/);