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function testFunctionName(f) {
var name = f.name;
f.name = 'g';
assertEq(f.name, name);
assertEq(delete f.name, true);
assertEq(f.name, '');
assertEq(f.hasOwnProperty('name'), false);
f.name = 'g';
assertEq(f.name, '');
Object.defineProperty(f, 'name', {value: 'g'});
assertEq(f.name, 'g');
}
function testFunctionNameStrict(f) {
"use strict";
var name = f.name;
var error;
try {
f.name = 'g';
} catch (e) {
error = e;
}
assertEq(f.name, name);
assertEq(error instanceof TypeError, true);
assertEq(delete f.name, true);
assertEq(f.name, '');
assertEq(f.hasOwnProperty('name'), false);
error = null;
try {
f.name = 'g';
} catch (e) {
error = e;
}
assertEq(f.name, '');
assertEq(error instanceof TypeError, true);
Object.defineProperty(f, 'name', {value: 'g'});
assertEq(f.name, 'g');
}
assertEq(Object.getOwnPropertyDescriptor(Object, "name").writable, false);
assertEq(Object.getOwnPropertyDescriptor(Object, "name").enumerable, false);
assertEq(Object.getOwnPropertyDescriptor(Object, "name").configurable, true);
assertEq(Object.getOwnPropertyDescriptor(Object, "name").value, 'Object');
assertEq(Object.getOwnPropertyDescriptor(function f(){}, "name").writable, false);
assertEq(Object.getOwnPropertyDescriptor(function f(){}, "name").enumerable, false);
assertEq(Object.getOwnPropertyDescriptor(function f(){}, "name").configurable, true);
assertEq(Object.getOwnPropertyDescriptor(function f(){}, "name").value, 'f');
// Basic test ensuring that Object.defineProperty works on pristine function.
function f() {};
Object.defineProperty(f, 'name', {value: 'g'});
assertEq(f.name, 'g');
// .name behaves as expected on scripted function.
testFunctionName(function f(){});
testFunctionNameStrict(function f(){});
// .name behaves as expected on builtin function.
testFunctionName(Function.prototype.apply);
testFunctionNameStrict(Function.prototype.call);
// .name behaves as expected on self-hosted builtin function.
testFunctionName(Array.prototype.forEach);
testFunctionNameStrict(Array.prototype.some);
if (typeof reportCompare === "function")
reportCompare(0, 0);
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