The Tor Browser: comparison addon-sdk/source/test/test-heritage.js

comparison: addon-sdk/source/test/test-heritage.js

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

branch: TOR_BUG_3246
changeset 7: 129ffea94266

equal deleted inserted replaced

--1:000000000000
+:90f671811bd6
+/* 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 { Class, extend, mix, obscure } = require('sdk/core/heritage');
+exports['test extend'] = function(assert) {
+let ancestor = { a: 1 };
+let descendant = extend(ancestor, {
+b: 2,
+get c() { return 3 },
+d: function() { return 4 }
+});
+assert.ok(ancestor.isPrototypeOf(descendant),
+'descendant inherits from ancestor');
+assert.ok(descendant.b, 2, 'proprety was implemented');
+assert.ok(descendant.c, 3, 'getter was implemented');
+assert.ok(descendant.d(), 4, 'method was implemented');
+/* Will be fixed once Bug 674195 is shipped.
+assert.ok(Object.isFrozen(descendant),
+'extend returns frozen objects');
+*/
+};
+exports['test mix'] = function(assert) {
+let ancestor = { a: 1 }
+let mixed = mix(extend(ancestor, { b: 1, c: 1 }), { c: 2 }, { d: 3 });
+assert.deepEqual(JSON.parse(JSON.stringify(mixed)), { b: 1, c: 2, d: 3 },
+'properties mixed as expected');
+assert.ok(ancestor.isPrototypeOf(mixed),
+'first arguments ancestor is ancestor of result');
+};
+exports['test obscure'] = function(assert) {
+let fixture = mix({ a: 1 }, obscure({ b: 2 }));
+assert.equal(fixture.a, 1, 'a property is included');
+assert.equal(fixture.b, 2, 'b proprety is included');
+assert.ok(!Object.getOwnPropertyDescriptor(fixture, 'b').enumerable,
+'obscured properties are non-enumerable');
+};
+exports['test inheritance'] = function(assert) {
+let Ancestor = Class({
+name: 'ancestor',
+method: function () {
+return 'hello ' + this.name;
+}
+});
+assert.ok(Ancestor() instanceof Ancestor,
+'can be instantiated without new');
+assert.ok(new Ancestor() instanceof Ancestor,
+'can also be instantiated with new');
+assert.ok(Ancestor() instanceof Class,
+'if ancestor not specified than defaults to Class');
+assert.ok(Ancestor.prototype.extends, Class.prototype,
+'extends of prototype points to ancestors prototype');
+assert.equal(Ancestor().method(), 'hello ancestor',
+'instance inherits defined properties');
+let Descendant = Class({
+extends: Ancestor,
+name: 'descendant'
+});
+assert.ok(Descendant() instanceof Descendant,
+'instantiates correctly');
+assert.ok(Descendant() instanceof Ancestor,
+'Inherits for passed `extends`');
+assert.equal(Descendant().method(), 'hello descendant',
+'propreties inherited');
+};
+exports['test immunity against __proto__'] = function(assert) {
+let Foo = Class({ name: 'foo', hacked: false });
+let Bar = Class({ extends: Foo, name: 'bar' });
+assert.throws(function() {
+Foo.prototype.__proto__ = { hacked: true };
+if (Foo() instanceof Base && !Foo().hacked)
+throw Error('can not change prototype chain');
+}, 'prototype chain is immune to __proto__ hacks');
+assert.throws(function() {
+Foo.prototype.__proto__ = { hacked: true };
+if (Bar() instanceof Foo && !Bar().hacked)
+throw Error('can not change prototype chain');
+}, 'prototype chain of decedants immune to __proto__ hacks');
+};
+exports['test super'] = function(assert) {
+var Foo = Class({
+initialize: function initialize(options) {
+this.name = options.name;
+}
+});
+var Bar = Class({
+extends: Foo,
+initialize: function Bar(options) {
+Foo.prototype.initialize.call(this, options);
+this.type = 'bar';
+}
+});
+var bar = Bar({ name: 'test' });
+assert.equal(bar.type, 'bar', 'bar initializer was called');
+assert.equal(bar.name, 'test', 'bar initializer called Foo initializer');
+};
+exports['test initialize'] = function(assert) {
+var Dog = Class({
+initialize: function initialize(name) {
+this.name = name;
+},
+type: 'dog',
+bark: function bark() {
+return 'Ruff! Ruff!'
+}
+});
+var fluffy = Dog('Fluffy');   // instatiation
+assert.ok(fluffy instanceof Dog,
+'instanceof works as expected');
+assert.ok(fluffy instanceof Class,
+'inherits form Class if not specified otherwise');
+assert.ok(fluffy.name, 'fluffy',
+'initialize unless specified otherwise');
+};
+exports['test complements regular inheritace'] = function(assert) {
+let Base = Class({ name: 'base' });
+function Type() {
+// ...
+}
+Type.prototype = Object.create(Base.prototype);
+Type.prototype.run = function() {
+// ...
+};
+let value = new Type();
+assert.ok(value instanceof Type, 'creates instance of Type');
+assert.ok(value instanceof Base, 'inherits from Base');
+assert.equal(value.name, 'base', 'inherits properties from Base');
+let SubType = Class({
+extends: Type,
+sub: 'type'
+});
+let fixture = SubType();
+assert.ok(fixture instanceof Base, 'is instance of Base');
+assert.ok(fixture instanceof Type, 'is instance of Type');
+assert.ok(fixture instanceof SubType, 'is instance of SubType');
+assert.equal(fixture.sub, 'type', 'proprety is defined');
+assert.equal(fixture.run, Type.prototype.run, 'proprety is inherited');
+assert.equal(fixture.name, 'base', 'inherits base properties');
+};
+exports['test extends object'] = function(assert) {
+let prototype = { constructor: function() { return this; }, name: 'me' };
+let Foo = Class({
+extends: prototype,
+value: 2
+});
+let foo = new Foo();
+assert.ok(foo instanceof Foo, 'instance of Foo');
+assert.ok(!(foo instanceof Class), 'is not instance of Class');
+assert.ok(prototype.isPrototypeOf(foo), 'inherits from given prototype');
+assert.equal(Object.getPrototypeOf(Foo.prototype), prototype,
+'contsructor prototype inherits from extends option');
+assert.equal(foo.value, 2, 'property is defined');
+assert.equal(foo.name, 'me', 'prototype proprety is inherited');
+};
+var HEX = Class({
+hex: function hex() {
+return '#' + this.color;
+}
+});
+var RGB = Class({
+red: function red() {
+return parseInt(this.color.substr(0, 2), 16);
+},
+green: function green() {
+return parseInt(this.color.substr(2, 2), 16);
+},
+blue: function blue() {
+return parseInt(this.color.substr(4, 2), 16);
+}
+});
+var CMYK = Class({
+black: function black() {
+var color = Math.max(Math.max(this.red(), this.green()), this.blue());
+return (1 - color / 255).toFixed(4);
+},
+magenta: function magenta() {
+var K = this.black();
+return (((1 - this.green() / 255).toFixed(4) - K) / (1 - K)).toFixed(4);
+},
+yellow: function yellow() {
+var K = this.black();
+return (((1 - this.blue() / 255).toFixed(4) - K) / (1 - K)).toFixed(4);
+},
+cyan: function cyan() {
+var K = this.black();
+return (((1 - this.red() / 255).toFixed(4) - K) / (1 - K)).toFixed(4);
+}
+});
+var Color = Class({
+implements: [ HEX, RGB, CMYK ],
+initialize: function initialize(color) {
+this.color = color;
+}
+});
+exports['test composition'] = function(assert) {
+var pink = Color('FFC0CB');
+assert.equal(pink.red(), 255, 'red() works');
+assert.equal(pink.green(), 192, 'green() works');
+assert.equal(pink.blue(), 203, 'blue() works');
+assert.equal(pink.magenta(), 0.2471, 'magenta() works');
+assert.equal(pink.yellow(), 0.2039, 'yellow() works');
+assert.equal(pink.cyan(), 0.0000, 'cyan() works');
+assert.ok(pink instanceof Color, 'is instance of Color');
+assert.ok(pink instanceof Class, 'is instance of Class');
+};
+var Point = Class({
+initialize: function initialize(x, y) {
+this.x = x;
+this.y = y;
+},
+toString: function toString() {
+return this.x + ':' + this.y;
+}
+})
+var Pixel = Class({
+extends: Point,
+implements: [ Color ],
+initialize: function initialize(x, y, color) {
+Color.prototype.initialize.call(this, color);
+Point.prototype.initialize.call(this, x, y);
+},
+toString: function toString() {
+return this.hex() + '@' + Point.prototype.toString.call(this)
+}
+});
+exports['test compostion with inheritance'] = function(assert) {
+var pixel = Pixel(11, 23, 'CC3399');
+assert.equal(pixel.toString(), '#CC3399@11:23', 'stringifies correctly');
+assert.ok(pixel instanceof Pixel, 'instance of Pixel');
+assert.ok(pixel instanceof Point, 'instance of Point');
+};
+exports['test composition with objects'] = function(assert) {
+var A = { a: 1, b: 1 };
+var B = Class({ b: 2, c: 2 });
+var C = { c: 3 };
+var D = { d: 4 };
+var ABCD = Class({
+implements: [ A, B, C, D ],
+e: 5
+});
+var f = ABCD();
+assert.equal(f.a, 1, 'inherits A.a');
+assert.equal(f.b, 2, 'inherits B.b overrides A.b');
+assert.equal(f.c, 3, 'inherits C.c overrides B.c');
+assert.equal(f.d, 4, 'inherits D.d');
+assert.equal(f.e, 5, 'implements e');
+};
+require("test").run(exports);