The Tor Browser: addon-sdk/source/test/test-promise.js@ac0c01689b40 (annotated)

addon-sdk/source/test/test-promise.js@ac0c01689b40 (annotated)

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

Thu, 15 Jan 2015 15:59:08 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:59:08 +0100
branch: TOR_BUG_9701
changeset 10: ac0c01689b40
permissions: -rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* 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, Cu, Ci } = require('chrome');
 const { setTimeout } = require('sdk/timers');
 const { prefixURI, name } = require('@loader/options');
 const addonPromiseURI = prefixURI + name + '/lib/sdk/core/promise.js';
 const builtPromiseURI = 'resource://gre/modules/commonjs/sdk/core/promise.js';
 let { Promise, defer, resolve, reject, all, promised } = require('sdk/core/promise');
 exports['test all observers are notified'] = function(assert, done) {
   let expected = 'Taram pam param!';
   let deferred = defer();
   let pending = 10, i = 0;
   function resolved(value) {
     assert.equal(value, expected, 'value resolved as expected: #' + pending);
     if (!--pending) done();
   }
   while (i++ < pending) deferred.promise.then(resolved);
   deferred.resolve(expected);
 };
 exports['test exceptions dont stop notifications'] = function(assert, done) {
   let threw = false, boom = Error('Boom!');
   let deferred = defer();
   let promise2 = deferred.promise.then(function() {
     threw = true;
     throw boom;
   });
   deferred.promise.then(function() {
     assert.ok(threw, 'observer is called even though previos one threw');
     promise2.then(function() {
       assert.fail('should not resolve');
     }, function(reason) {
       assert.equal(reason, boom, 'rejects to thrown error');
       done();
     });
   });
   deferred.resolve('go!');
 };
 exports['test subsequent resolves are ignored'] = function(assert, done) {
   let deferred = defer();
   deferred.resolve(1);
   deferred.resolve(2);
   deferred.reject(3);
   deferred.promise.then(function(actual) {
     assert.equal(actual, 1, 'resolves to first value');
   }, function() {
     assert.fail('must not reject');
   });
   deferred.promise.then(function(actual) {
     assert.equal(actual, 1, 'subsequent resolutions are ignored');
     done();
   }, function() {
     assert.fail('must not reject');
   });
 };
 exports['test subsequent rejections are ignored'] = function(assert, done) {
   let deferred = defer();
   deferred.reject(1);
   deferred.resolve(2);
   deferred.reject(3);
   deferred.promise.then(function(actual) {
     assert.fail('must not resolve');
   }, function(actual) {
     assert.equal(actual, 1, 'must reject to first');
   });
   deferred.promise.then(function(actual) {
     assert.fail('must not resolve');
   }, function(actual) {
     assert.equal(actual, 1, 'must reject to first');
     done();
   });
 };
 exports['test error recovery'] = function(assert, done) {
   let boom = Error('Boom!');
   let deferred = defer();
   deferred.promise.then(function() {
     assert.fail('rejected promise should not resolve');
   }, function(reason) {
     assert.equal(reason, boom, 'rejection reason delivered');
     return 'recovery';
   }).then(function(value) {
     assert.equal(value, 'recovery', 'error handled by a handler');
     done();
   });
   deferred.reject(boom);
 };
 exports['test error recovery with promise'] = function(assert, done) {
   let deferred = defer();
   deferred.promise.then(function() {
     assert.fail('must reject');
   }, function(actual) {
     assert.equal(actual, 'reason', 'rejected');
     let deferred = defer();
     deferred.resolve('recovery');
     return deferred.promise;
   }).then(function(actual) {
     assert.equal(actual, 'recovery', 'recorvered via promise');
     let deferred = defer();
     deferred.reject('error');
     return deferred.promise;
   }).then(null, function(actual) {
     assert.equal(actual, 'error', 'rejected via promise');
     let deferred = defer();
     deferred.reject('end');
     return deferred.promise;
   }).then(null, function(actual) {
     assert.equal(actual, 'end', 'rejeced via promise');
     done();
   });
   deferred.reject('reason');
 };
 exports['test propagation'] = function(assert, done) {
   let d1 = defer(), d2 = defer(), d3 = defer();
   d1.promise.then(function(actual) {
     assert.equal(actual, 'expected', 'resolves to expected value');
     done();
   });
   d1.resolve(d2.promise);
   d2.resolve(d3.promise);
   d3.resolve('expected');
 };
 exports['test chaining'] = function(assert, done) {
   let boom = Error('boom'), brax = Error('braxXXx');
   let deferred = defer();
   deferred.promise.then().then().then(function(actual) {
     assert.equal(actual, 2, 'value propagates unchanged');
     return actual + 2;
   }).then(null, function(reason) {
     assert.fail('should not reject');
   }).then(function(actual) {
     assert.equal(actual, 4, 'value propagates through if not handled');
     throw boom;
   }).then(function(actual) {
     assert.fail('exception must reject promise');
   }).then().then(null, function(actual) {
     assert.equal(actual, boom, 'reason propagates unchanged');
     throw brax;
   }).then().then(null, function(actual) {
     assert.equal(actual, brax, 'reason changed becase of exception');
     return 'recovery';
   }).then(function(actual) {
     assert.equal(actual, 'recovery', 'recovered from error');
     done();
   });
   deferred.resolve(2);
 };
 exports['test reject'] = function(assert, done) {
   let expected = Error('boom');
   reject(expected).then(function() {
     assert.fail('should reject');
   }, function(actual) {
     assert.equal(actual, expected, 'rejected with expected reason');
   }).then(done, assert.fail);
 };
 exports['test resolve to rejected'] = function(assert, done) {
   let expected = Error('boom');
   let deferred = defer();
   deferred.promise.then(function() {
     assert.fail('should reject');
   }, function(actual) {
     assert.equal(actual, expected, 'rejected with expected failure');
   }).then(done, assert.fail);
   deferred.resolve(reject(expected));
 };
 exports['test resolve'] = function(assert, done) {
   let expected = 'value';
   resolve(expected).then(function(actual) {
     assert.equal(actual, expected, 'resolved as expected');
   }).catch(assert.fail).then(done);
 };
 exports['test promised with normal args'] = function(assert, done) {
   let sum = promised((x, y) => x + y );
   sum(7, 8).then(function(actual) {
     assert.equal(actual, 7 + 8, 'resolves as expected');
   }).catch(assert.fail).then(done);
 };
 exports['test promised with promise args'] = function(assert, done) {
   let sum = promised((x, y) => x + y );
   let deferred = defer();
   sum(11, deferred.promise).then(function(actual) {
     assert.equal(actual, 11 + 24, 'resolved as expected');
   }).catch(assert.fail).then(done);
   deferred.resolve(24);
 };
 exports['test promised error handleing'] = function(assert, done) {
   let expected = Error('boom');
   let f = promised(function() {
     throw expected;
   });
   f().then(function() {
     assert.fail('should reject');
   }, function(actual) {
     assert.equal(actual, expected, 'rejected as expected');
   }).catch(assert.fail).then(done);
 };
 exports['test errors in promise resolution handlers are propagated'] = function(assert, done) {
   var expected = Error('Boom');
   var { promise, resolve } = defer();
   promise.then(function() {
     throw expected;
   }).then(function() {
     return undefined;
   }).then(null, function(actual) {
     assert.equal(actual, expected, 'rejected as expected');
   }).then(done, assert.fail);
   resolve({});
 };
 exports['test return promise form promised'] = function(assert, done) {
   let f = promised(function() {
     return resolve(17);
   });
   f().then(function(actual) {
     assert.equal(actual, 17, 'resolves to a promise resolution');
   }).catch(assert.fail).then(done);
 };
 exports['test promised returning failure'] = function(assert, done) {
   let expected = Error('boom');
   let f = promised(function() {
     return reject(expected);
   });
   f().then(function() {
     assert.fail('must reject');
   }, function(actual) {
     assert.equal(actual, expected, 'rejects with expected reason');
   }).catch(assert.fail).then(done);
 };
 /*
  * Changed for compliance in Bug 881047, promises are now always async
  */
 exports['test promises are always async'] = function (assert, done) {
   let runs = 0;
   resolve(1)
     .then(val => ++runs)
     .catch(assert.fail).then(done);
   assert.equal(runs, 0, 'resolutions are called in following tick');
 };
 /*
  * Changed for compliance in Bug 881047, promised's are now non greedy
  */
 exports['test promised are not greedy'] = function(assert, done) {
   let runs = 0;
   promised(() => ++runs)()
     .catch(assert.fail).then(done);
   assert.equal(runs, 0, 'promised does not run task right away');
 };
 exports['test arrays should not flatten'] = function(assert, done) {
   let a = defer();
   let b = defer();
   let combine = promised(function(str, arr) {
     assert.equal(str, 'Hello', 'Array was not flattened');
     assert.deepEqual(arr, [ 'my', 'friend' ]);
   });
   combine(a.promise, b.promise).catch(assert.fail).then(done);
   a.resolve('Hello');
   b.resolve([ 'my', 'friend' ]);
 };
 exports['test `all` for all promises'] = function (assert, done) {
   all([
     resolve(5), resolve(7), resolve(10)
   ]).then(function (val) {
     assert.equal(
       val[0] === 5 &&
       val[1] === 7 &&
       val[2] === 10
     , true, 'return value contains resolved promises values');
     done();
   }, function () {
     assert.fail('should not call reject function');
   });
 };
 exports['test `all` aborts upon first reject'] = function (assert, done) {
   all([
     resolve(5), reject('error'), delayedResolve()
   ]).then(function (val) {
     assert.fail('Successful resolve function should not be called');
   }, function (reason) {
     assert.equal(reason, 'error', 'should reject the `all` promise');
     done();
   });
   function delayedResolve () {
     let deferred = defer();
     setTimeout(deferred.resolve, 50);
     return deferred.promise;
   }
 };
 exports['test `all` with array containing non-promise'] = function (assert, done) {
   all([
     resolve(5), resolve(10), 925
   ]).then(function (val) {
     assert.equal(val[2], 925, 'non-promises should pass-through value');
     done();
   }, function () {
     assert.fail('should not be rejected');
   });
 };
 exports['test `all` should resolve with an empty array'] = function (assert, done) {
   all([]).then(function (val) {
     assert.equal(Array.isArray(val), true, 'should return array in resolved');
     assert.equal(val.length, 0, 'array should be empty in resolved');
     done();
   }, function () {
     assert.fail('should not be rejected');
   });
 };
 exports['test `all` with multiple rejected'] = function (assert, done) {
   all([
     reject('error1'), reject('error2'), reject('error3')
   ]).then(function (value) {
     assert.fail('should not be successful');
   }, function (reason) {
     assert.equal(reason, 'error1', 'should reject on first promise reject');
     done();
   });
 };
 exports['test Promise constructor resolve'] = function (assert, done) {
   var isAsync = true;
   new Promise(function (resolve, reject) {
     resolve(5);
   }).then(x => {
     isAsync = false;
     assert.equal(x, 5, 'Promise constructor resolves correctly');
   }).catch(assert.fail).then(done);
   assert.ok(isAsync, 'Promise constructor runs async');
 };
 exports['test Promise constructor reject'] = function (assert, done) {
   new Promise(function (resolve, reject) {
     reject(new Error('deferred4life'));
   }).then(assert.fail, (err) => {
     assert.equal(err.message, 'deferred4life', 'Promise constructor rejects correctly');
   }).catch(assert.fail).then(done);
 };
 exports['test JSM Load and API'] = function (assert, done) {
   // Use addon URL when loading from cfx/local:
   // resource://90111c90-c31e-4dc7-ac35-b65947434435-at-jetpack/addon-sdk/lib/sdk/core/promise.js
   // Use built URL when testing on try, etc.
   // resource://gre/modules/commonjs/sdk/core/promise.js
   try {
     var { Promise } = Cu.import(addonPromiseURI, {});
   } catch (e) {
     var { Promise } = Cu.import(builtPromiseURI, {});
   }
   testEnvironment(Promise, assert, done, 'JSM');
 };
 exports['test mozIJSSubScriptLoader exporting'] = function (assert, done) {
   let { Services } = Cu.import('resource://gre/modules/Services.jsm', {});
   let systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
   let Promise = new Cu.Sandbox(systemPrincipal);
   let loader = Cc['@mozilla.org/moz/jssubscript-loader;1']
                  .getService(Ci.mozIJSSubScriptLoader);
   // Use addon URL when loading from cfx/local:
   // resource://90111c90-c31e-4dc7-ac35-b65947434435-at-jetpack/addon-sdk/lib/sdk/core/promise.js
   // Use built URL when testing on try, etc.
   // resource://gre/modules/commonjs/sdk/core/promise.js
   try {
     loader.loadSubScript(addonPromiseURI, Promise);
   } catch (e) {
     loader.loadSubScript(builtPromiseURI, Promise);
   }
   testEnvironment(Promise, assert, done, 'mozIJSSubScript');
 };
 function testEnvironment ({all, resolve, defer, reject, promised}, assert, done, type) {
   all([resolve(5), resolve(10), 925]).then(val => {
     assert.equal(val[0], 5, 'promise#all works ' + type);
     assert.equal(val[1], 10, 'promise#all works ' + type);
     assert.equal(val[2], 925, 'promise#all works ' + type);
     return resolve(1000);
   }).then(value => {
     assert.equal(value, 1000, 'promise#resolve works ' + type);
     return reject('testing reject');
   }).then(null, reason => {
     assert.equal(reason, 'testing reject', 'promise#reject works ' + type);
     let deferred = defer();
     setTimeout(() => deferred.resolve('\\m/'), 10);
     return deferred.promise;
   }).then(value => {
     assert.equal(value, '\\m/', 'promise#defer works ' + type);
     return promised(x => x * x)(5);
   }).then(value => {
     assert.equal(value, 25, 'promise#promised works ' + type);
   }).then(done, assert.fail);
 }
 require("sdk/test").run(exports);