michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 'use strict';
michael@0: 
michael@0: const { PrefsTarget } = require('sdk/preferences/event-target');
michael@0: const { get, set, reset } = require('sdk/preferences/service');
michael@0: const { Loader } = require('sdk/test/loader');
michael@0: const { setTimeout } = require('sdk/timers');
michael@0: 
michael@0: const root = PrefsTarget();
michael@0: 
michael@0: exports.testPrefsTarget = function(assert, done) {
michael@0:   let loader = Loader(module);
michael@0:   let pt = loader.require('sdk/preferences/event-target').PrefsTarget({});
michael@0:   let name = 'test';
michael@0: 
michael@0:   assert.equal(get(name, ''), '', 'test pref is blank');
michael@0: 
michael@0:   pt.once(name, function() {
michael@0:     assert.equal(pt.prefs[name], 2, 'test pref is 2');
michael@0: 
michael@0:     pt.once(name, function() {
michael@0:       assert.fail('should not have heard a pref change');
michael@0:     });
michael@0:     loader.unload();
michael@0:     root.once(name, function() {
michael@0:       assert.pass('test pref was changed');
michael@0:       reset(name);
michael@0: 
michael@0:       // NOTE: using setTimeout to make sure that the other listener had
michael@0:       //       a chance to fail
michael@0:       // end test
michael@0:       setTimeout(done);
michael@0:     });
michael@0:     set(name, 3);
michael@0:   });
michael@0: 
michael@0:   pt.prefs[name] = 2;
michael@0: };
michael@0: 
michael@0: require('sdk/test').run(exports);