mirror of
https://github.com/mozilla/gecko-dev.git
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399 lines
8.8 KiB
JavaScript
399 lines
8.8 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Trait } = require('sdk/deprecated/traits');
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exports['test:simple compose'] = function(test) {
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let List = Trait.compose({
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_list: null,
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constructor: function List() {
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this._list = [];
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},
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list: function list() this._list.slice(0),
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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test.assertNotEqual(undefined, List, 'should not be undefined');
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test.assertEqual('function', typeof List, 'type should be function');
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test.assertEqual(
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Trait.compose,
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List.compose,
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'should inherit static compose'
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);
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test.assertEqual(
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Trait.override,
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List.override,
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'should inherit static override'
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);
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test.assertEqual(
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Trait.required,
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List.required,
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'should inherit static required'
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);
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test.assertEqual(
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Trait.resolve,
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List.resolve,
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'should inherit static resolve'
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);
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test.assert(
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!('_list' in List.prototype),
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'should not expose private API'
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);
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}
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exports['test: compose trait instance and create instance'] = function(test) {
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let List = Trait.compose({
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constructor: function List(options) {
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this._list = [];
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this._public.publicMember = options.publicMember;
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},
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_privateMember: true,
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get privateMember() this._privateMember,
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get list() this._list.slice(0),
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list
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let index = list.indexOf(item)
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if (0 <= index) list.slice(index, 1)
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}
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});
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let list = List({ publicMember: true });
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test.assertEqual('object', typeof list, 'should return an object')
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test.assertEqual(
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true,
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list instanceof List,
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'should be instance of a List'
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);
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test.assertEqual(
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undefined,
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list._privateMember,
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'instance should not expose private API'
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);
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test.assertEqual(
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true,
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list.privateMember,
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'privates are accessible by public API'
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);
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list._privateMember = false;
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test.assertEqual(
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true,
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list.privateMember,
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'property changes on instance must not affect privates'
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);
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test.assert(
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!('_list' in list),
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'instance should not expose private members'
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);
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test.assertEqual(
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true,
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list.publicMember,
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'public members are exposed'
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)
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test.assertEqual(
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'function',
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typeof list.add,
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'should be function'
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)
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test.assertEqual(
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'function',
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typeof list.remove,
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'should be function'
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);
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list.add(1);
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test.assertEqual(
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1,
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list.list[0],
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'exposed public API should be able of modifying privates'
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)
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};
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exports['test:instances must not be hackable'] = function(test) {
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let SECRET = 'There is no secret!',
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secret = null;
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let Class = Trait.compose({
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_secret: null,
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protect: function(data) this._secret = data
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});
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let i1 = Class();
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i1.protect(SECRET);
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test.assertEqual(
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undefined,
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(function() this._secret).call(i1),
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'call / apply can\'t access private state'
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);
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let proto = Object.getPrototypeOf(i1);
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try {
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proto.reveal = function() this._secret;
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secret = i1.reveal();
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} catch(e) {}
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test.assertNotEqual(
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SECRET,
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secret,
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'public __proto__ changes should not affect privates'
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);
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secret = null;
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let Class2 = Trait.compose({
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_secret: null,
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protect: function(data) this._secret = data
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});
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let i2 = Class2();
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i2.protect(SECRET);
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try {
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Object.prototype.reveal = function() this._secret;
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secret = i2.reveal();
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} catch(e) {}
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test.assertNotEqual(
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SECRET,
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secret,
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'Object.prototype changes must not affect instances'
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);
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}
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exports['test:instanceof'] = function(test) {
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const List = Trait.compose({
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// private API:
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_list: null,
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// public API
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constructor: function List() {
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this._list = []
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},
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get length() this._list.length,
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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test.assert(List() instanceof List, 'Must be instance of List');
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test.assert(new List() instanceof List, 'Must be instance of List');
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};
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exports['test:privates are unaccessible'] = function(test) {
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const List = Trait.compose({
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// private API:
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_list: null,
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// public API
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constructor: function List() {
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this._list = [];
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},
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get length() this._list.length,
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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let list = List();
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test.assert(!('_list' in list), 'no privates on instance');
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test.assert(
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!('_list' in List.prototype),
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'no privates on prototype'
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);
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};
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exports['test:public API can access private API'] = function(test) {
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const List = Trait.compose({
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// private API:
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_list: null,
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// public API
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constructor: function List() {
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this._list = [];
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},
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get length() this._list.length,
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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let list = List();
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list.add('test');
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test.assertEqual(
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1,
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list.length,
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'should be able to add element and access it from public getter'
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);
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};
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exports['test:required'] = function(test) {
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const Enumerable = Trait.compose({
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list: Trait.required,
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forEach: function forEach(consumer) {
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return this.list.forEach(consumer);
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}
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});
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try {
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let i = Enumerable();
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test.fail('should throw when creating instance with required properties');
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} catch(e) {
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test.assertEqual(
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'Error: Missing required property: list',
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e.toString(),
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'required prop error'
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);
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}
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};
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exports['test:compose with required'] = function(test) {
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const List = Trait.compose({
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// private API:
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_list: null,
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// public API
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constructor: function List() {
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this._list = [];
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},
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get length() this._list.length,
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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const Enumerable = Trait.compose({
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list: Trait.required,
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forEach: function forEach(consumer) {
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return this.list.forEach(consumer);
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}
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});
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const EnumerableList = Enumerable.compose({
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get list() this._list.slice(0)
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}, List);
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let array = [1,2, 'ab']
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let l = EnumerableList(array);
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array.forEach(function(element) l.add(element));
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let number = 0;
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l.forEach(function(element, index) {
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number ++;
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test.assertEqual(array[index], element, 'should mach array element')
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});
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test.assertEqual(
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array.length,
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number,
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'should perform as many asserts as elements in array'
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);
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};
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exports['test:resolve'] = function(test) {
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const List = Trait.compose({
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// private API:
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_list: null,
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// public API
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constructor: function List() {
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this._list = [];
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},
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get length() this._list.length,
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add: function add(item) this._list.push(item),
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remove: function remove(item) {
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let list = this._list;
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let index = list.indexOf(item);
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if (0 <= index) list.slice(index, 1);
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}
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});
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const Range = List.resolve({
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constructor: null,
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add: '_add',
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}).compose({
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min: null,
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max: null,
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get list() this._list.slice(0),
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constructor: function Range(min, max) {
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this.min = min;
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this.max = max;
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this._list = [];
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},
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add: function(item) {
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if (item <= this.max && item >= this.min)
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this._add(item)
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}
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});
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let r = Range(0, 10);
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test.assertEqual(
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0,
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r.min,
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'constructor must have set min'
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);
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test.assertEqual(
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10,
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r.max,
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'constructor must have set max'
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);
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test.assertEqual(
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0,
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r.length,
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'should not contain any elements'
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);
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r.add(5);
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test.assertEqual(
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1,
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r.length,
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'should add `5` to list'
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);
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r.add(12);
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test.assertEqual(
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1,
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r.length,
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'should not add `12` to list'
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);
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};
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exports['test:custom iterator'] = function(test) {
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let Sub = Trait.compose({
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foo: "foo",
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bar: "bar",
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baz: "baz",
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__iterator__: function() {
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yield 1;
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yield 2;
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yield 3;
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}
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});
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let (i = 0, sub = Sub()) {
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for (let item in sub)
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test.assertEqual(++i, item, "iterated item has the right value");
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};
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};
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