test_eventemitter_destroy.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";

add_task(function () {

  const { DevToolsLoader, require } = ChromeUtils.importESModule(

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

);

  // Force-load the module once in the global loader to avoid Bug 1622718.

  require("resource://devtools/shared/event-emitter.js");

  const emitterRef = (function () {

    const loader = new DevToolsLoader();

    const ref = Cu.getWeakReference(

      loader.require("resource://devtools/shared/event-emitter.js")

);

    loader.destroy();

    return ref;

  })();

  Cu.forceGC();

  Cu.forceCC();

  Cu.forceGC();

  Cu.forceCC();

  Assert.ok(!emitterRef.get(), "weakref has been cleared by gc");

});