gecko-dev/addon-sdk/source/test/test-test-memory.js

/* 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';

const { Cc, Ci, Cu, components } = require('chrome');
const { gc } = require('sdk/test/memory');

exports.testGC = function*(assert) {
  let weakref;

  if (true) {
    let tempObj = {};
    weakref = Cu.getWeakReference(tempObj);
    assert.equal(weakref.get(), tempObj, 'the weakref returned the tempObj');
  }

  let arg = yield gc();

  assert.equal(arg, undefined, 'there is no argument');
  assert.pass('gc() returns a promise which eventually resolves');
  assert.equal(weakref.get(), undefined, 'the weakref returned undefined');
};

require('sdk/test').run(exports);