The Tor Browser: addon-sdk/source/test/test-observers.js@6474c204b198 (annotated)

addon-sdk/source/test/test-observers.js@6474c204b198 (annotated)

addon-sdk/source/test/test-observers.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* 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 { Loader } = require("sdk/test/loader");
 const { isWeak, WeakReference } = require("sdk/core/reference");
 const { subscribe, unsubscribe,
         observe, Observer } = require("sdk/core/observer");
 const { Class } = require("sdk/core/heritage");
 const { Cc, Ci, Cu } = require("chrome");
 const { notifyObservers } = Cc["@mozilla.org/observer-service;1"].
                               getService(Ci.nsIObserverService);
 const message = x => ({wrappedJSObject: x});
 exports["test subscribe unsubscribe"] = assert => {
   const topic = Date.now().toString(32);
   const Subscriber = Class({
     extends: Observer,
     initialize: function(observe) {
       this.observe = observe;
     }
   });
   observe.define(Subscriber, (x, subject, _, data) =>
                                 x.observe(subject.wrappedJSObject.x));
   let xs = [];
   const x = Subscriber((...rest) => xs.push(...rest));
   let ys = [];
   const y = Subscriber((...rest) => ys.push(...rest));
   const publish = (topic, data) =>
     notifyObservers(message(data), topic, null);
   publish({x:0});
   subscribe(x, topic);
   publish(topic, {x:1});
   subscribe(y, topic);
   publish(topic, {x:2});
   publish(topic + "!", {x: 2.5});
   unsubscribe(x, topic);
   publish(topic, {x:3});
   subscribe(y, topic);
   publish(topic, {x:4});
   subscribe(x, topic);
   publish(topic, {x:5});
   unsubscribe(x, topic);
   unsubscribe(y, topic);
   publish(topic, {x:6});
   assert.deepEqual(xs, [1, 2, 5]);
   assert.deepEqual(ys, [2, 3, 4, 5]);
 }
 exports["test weak observers are GC-ed on unload"] = (assert, end) => {
   const topic = Date.now().toString(32);
   const loader = Loader(module);
   const { Observer, observe,
           subscribe, unsubscribe } = loader.require("sdk/core/observer");
   const { isWeak, WeakReference } = loader.require("sdk/core/reference");
   const MyObserver = Class({
     extends: Observer,
     initialize: function(observe) {
       this.observe = observe;
     }
   });
   observe.define(MyObserver, (x, ...rest) => x.observe(...rest));
   const MyWeakObserver = Class({
     extends: MyObserver,
     implements: [WeakReference]
   });
   let xs = [];
   let ys = [];
   let x = new MyObserver((subject, topic, data) => {
     xs.push(subject.wrappedJSObject, topic, data);
   });
   let y = new MyWeakObserver((subject, topic, data) => {
     ys.push(subject.wrappedJSObject, topic, data);
   });
   subscribe(x, topic);
   subscribe(y, topic);
   notifyObservers(message({ foo: 1 }), topic, null);
   x = null;
   y = null;
   loader.unload();
   Cu.schedulePreciseGC(() => {
     notifyObservers(message({ bar: 2 }), topic, ":)");
     assert.deepEqual(xs, [{ foo: 1 }, topic, null,
                           { bar: 2 }, topic, ":)"],
                      "non week observer is kept");
     assert.deepEqual(ys, [{ foo: 1 }, topic, null],
                      "week observer was GC-ed");
     end();
   });
 };
 require("sdk/test").run(exports);