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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
*/
var gTestfile = 'arguments-caller-callee.js';
var BUGNUMBER = 514563;
var summary = "arguments.caller and arguments.callee are poison pills in ES5, " +
"later changed in ES2017 to only poison pill arguments.callee.";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
// behavior
function expectTypeError(fun)
{
try
{
fun();
throw new Error("didn't throw");
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"expected TypeError calling function" +
("name" in fun ? " " + fun.name : "") + ", instead got: " + e);
}
}
function bar() { "use strict"; return arguments; }
assertEq(bar().caller, undefined); // No error when accessing arguments.caller in ES2017+
expectTypeError(function barCallee() { bar().callee; });
function baz() { return arguments; }
assertEq(baz().callee, baz);
// accessor identity
function strictMode() { "use strict"; return arguments; }
var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode(), "callee").get;
var args = strictMode();
var argsCaller = Object.getOwnPropertyDescriptor(args, "caller");
assertEq(argsCaller, undefined);
var argsCallee = Object.getOwnPropertyDescriptor(args, "callee");
assertEq("get" in argsCallee, true);
assertEq("set" in argsCallee, true);
assertEq(argsCallee.get, canonicalTTE);
assertEq(argsCallee.set, canonicalTTE);
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("All tests passed!");
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