proxy-proto-setter.js

Enable keyboard shortcuts

// |reftest| skip-if(!xulRuntime.shell)

// Any copyright is dedicated to the Public Domain.

// http://creativecommons.org/licenses/publicdomain/

// Contributor: Blake Kaplan

function expect(actual, arg) {

    reportCompare(expect.expected, actual, arg);

var window = { set x(y) { expect(this, y) }, y: 4 };

expect.expected = window;

window.x = "setting through a setter directly";

window.y = 5;

reportCompare(5, window.y, "setting properties works");

var easy = { easy: 'yes', __proto__: window }

expect.expected = easy;

easy.x = "setting through a setter all-native on prototype";

easy.y = 6;

reportCompare(5, window.y, "window.y remains as it was");

reportCompare(6, easy.y, "shadowing works properly");

var sandbox = evalcx('');

sandbox.window = window;

sandbox.print = print;

sandbox.expect = expect;

var hard = evalcx('Object.create(window)', sandbox);

expect.expected = hard;

hard.x = "a setter through proxy -> native";

hard.y = 6;

reportCompare(5, window.y, "window.y remains as it was through a proxy");

reportCompare(6, hard.y, "shadowing works on proxies");

hard.__proto__ = { 'passed': true }

reportCompare(true, hard.passed, "can set proxy.__proto__ through a native");

var inverse = evalcx('({ set x(y) { expect(this, y); }, y: 4 })', sandbox);

expect.expected = inverse;

inverse.x = "setting through a proxy directly";

inverse.y = 5;

reportCompare(5, inverse.y, "setting properties works on proxies");

var inversehard = Object.create(inverse);

expect.expected = inversehard;

inversehard.x = "setting through a setter with a proxy on the proto chain";

inversehard.y = 6;

reportCompare(5, inverse.y, "inverse.y remains as it was");

reportCompare(6, inversehard.y, "shadowing works native -> proxy");

inversehard.__proto__ = { 'passed': true }

reportCompare(true, inversehard.passed, "can set native.__proto__ through a proxy");