bound-length-and-name.js

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var proxy = new Proxy(function() {}, {

    getOwnPropertyDescriptor(target, name) {

        assertEq(name, "length");

        return {value: 3, configurable: true};

},

    get(target, name) {

        if (name == "length")

            return 3;

        if (name == "name")

            return "hello world";

        assertEq(false, true);

})

var bound = Function.prototype.bind.call(proxy);

assertEq(bound.name, "bound hello world");

assertEq(bound.length, 3);

var fun = function() {};

Object.defineProperty(fun, "name", {value: 1337});

Object.defineProperty(fun, "length", {value: "15"});

bound = fun.bind();

assertEq(bound.name, "bound ");

assertEq(bound.length, 0);

Object.defineProperty(fun, "length", {value: Number.MAX_SAFE_INTEGER});

bound = fun.bind();

assertEq(bound.length, Number.MAX_SAFE_INTEGER);

Object.defineProperty(fun, "length", {value: -100});

bound = fun.bind();

assertEq(bound.length, 0);

fun = function f(a, ...b) { };

assertEq(fun.length, 1);

bound = fun.bind();

assertEq(bound.length, 1);

reportCompare(0, 0, 'ok');