test_symbols_as_weak_keys.js

Enable keyboard shortcuts

/* 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/. */

function run_test()

  if (!Services.prefs.getBoolPref("javascript.options.experimental.symbols_as_weakmap_keys")) {

    return;

  var strKey = new String("strKey");

  var symKey = Symbol("symKey");

  var weakset = new WeakSet([strKey, symKey]);

  var weakmap = new WeakMap();

  weakmap.set(strKey, 23);

  weakmap.set(symKey, "oh no");

  var keys = ChromeUtils.nondeterministicGetWeakMapKeys(weakmap);

  equal(keys.length, 2, "length of nondeterministicGetWeakMapKeys");

  equal(weakmap.get(strKey), 23, "check strKey in weakmap");

  equal(weakmap.get(symKey), "oh no", "check symKey in weakmap");

  keys = ChromeUtils.nondeterministicGetWeakSetKeys(weakset);

  equal(keys.length, 2, "length of nondeterministicGetWeakSetKeys");

  ok(weakset.has(strKey), "check strKey in weakset");

  ok(weakset.has(symKey), "check symKey in weakset");

  strKey = null;

  keys = null;

  Cu.forceGC();

  keys = ChromeUtils.nondeterministicGetWeakMapKeys(weakmap);

  equal(keys.length, 1, "length of nondeterministicGetWeakMapKeys after GC");

  equal(weakmap.get(symKey), "oh no", "check symKey still in weakmap");

  keys = ChromeUtils.nondeterministicGetWeakSetKeys(weakset);

  equal(keys.length, 1, "length of nondeterministicGetWeakSetKeys after GC");

  ok(weakset.has(symKey), "check symKey still in weakset");