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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
*/
var gTestfile = 'trap-null.js';
var BUGNUMBER = 1257102;
var summary = "null as a trap value on a handler should operate on the target";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
// This might seem like overkill, but this proxying trick caught typos of
// several trap names before this test landed. \o/ /o\
var allTraps = {
getPrototypeOf: null,
setPrototypeOf: null,
isExtensible: null,
preventExtensions: null,
getOwnPropertyDescriptor: null,
defineProperty: null,
has: null,
get: null,
set: null,
deleteProperty: null,
ownKeys: null,
apply: null,
construct: null,
};
var complainingHandler = new Proxy(allTraps, {
get(target, p, receiver) {
var v = Reflect.get(target, p, receiver);
if (v !== null)
throw new TypeError("failed to set one of the traps to null? " + p);
return v;
}
});
var proxyTarget = function(x) {
"use strict";
var str = this + x;
str += new.target ? "constructing" : "calling";
return new.target ? new String(str) : str;
};
proxyTarget.prototype.toString = () => "###";
proxyTarget.prototype.valueOf = () => "@@@";
var proxy = new Proxy(proxyTarget, complainingHandler);
assertEq(Reflect.getPrototypeOf(proxy), Function.prototype);
assertEq(Object.getPrototypeOf(proxyTarget), Function.prototype);
assertEq(Reflect.setPrototypeOf(proxy, null), true);
assertEq(Object.getPrototypeOf(proxyTarget), null);
assertEq(Reflect.isExtensible(proxy), true);
assertEq(Reflect.isExtensible(proxyTarget), true);
assertEq(Reflect.preventExtensions(proxy), true);
assertEq(Reflect.isExtensible(proxy), false);
assertEq(Reflect.isExtensible(proxyTarget), false);
var desc = Reflect.getOwnPropertyDescriptor(proxy, "length");
assertEq(desc.value, 1);
assertEq(desc.configurable, true);
assertEq(Reflect.defineProperty(proxy, "length", { value: 3, configurable: false }), true);
desc = Reflect.getOwnPropertyDescriptor(proxy, "length");
assertEq(desc.configurable, false);
assertEq(Reflect.has(proxy, "length"), true);
assertEq(Reflect.get(proxy, "length"), 3);
assertEq(Reflect.set(proxy, "length", 3), false);
assertEq(Reflect.deleteProperty(proxy, "length"), false);
var keys = Reflect.ownKeys(proxy);
assertEq(keys.length, 3);
keys.sort();
assertEq(keys[0], "length");
assertEq(keys[1], "name");
assertEq(keys[2], "prototype");
assertEq(Reflect.apply(proxy, "hi!", [" "]), "hi! calling");
var res = Reflect.construct(proxy, [" - "]);
assertEq(typeof res, "object");
assertEq(res instanceof String, true);
assertEq(res.valueOf(), "@@@ - constructing");
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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