bound-prototype.js

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/* 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/. */

function Bound(fn) {

    return Function.prototype.bind.call(fn);

var fnDefaultPrototype = function(){};

assertEq(Object.getPrototypeOf(Bound(fnDefaultPrototype)), Function.prototype);

var fnGeneratorPrototype = function*(){};

assertEq(Object.getPrototypeOf(Bound(fnGeneratorPrototype)), function*(){}.constructor.prototype);

var fnCustomPrototype = Object.setPrototypeOf(function(){}, Array.prototype);

assertEq(Object.getPrototypeOf(Bound(fnCustomPrototype)), Array.prototype);

var fnNullPrototype = Object.setPrototypeOf(function(){}, null);

assertEq(Object.getPrototypeOf(Bound(fnNullPrototype)), null);

function LoggingProxy(target) {

    var log = [];

    var proxy = new Proxy(target, new Proxy({}, {

        get(target, propertyKey, receiver) {

            log.push(propertyKey);

    }));

    return {proxy, log};

var {proxy, log} = LoggingProxy(function(){});

Bound(proxy);

assertEqArray(log, ["getPrototypeOf", "getOwnPropertyDescriptor", "get", "get"]);

if (typeof reportCompare === "function")

    reportCompare(0, 0);