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// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 26.1.13
description: >
Return false if target property turns to a data descriptor and receiver
property is an accessor descriptor.
info: |
26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] )
...
4. If receiver is not present, then
a. Let receiver be target.
5. Return target.[[Set]](key, V, receiver).
9.1.9 [[Set]] ( P, V, Receiver)
...
4. If ownDesc is undefined, then
a. Let parent be O.[[GetPrototypeOf]]().
b. ReturnIfAbrupt(parent).
c. If parent is not null, then
i. Return parent.[[Set]](P, V, Receiver).
d. Else,
ii. Let ownDesc be the PropertyDescriptor{[[Value]]: undefined,
[[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}.
5. If IsDataDescriptor(ownDesc) is true, then
a. If ownDesc.[[Writable]] is false, return false.
b. If Type(Receiver) is not Object, return false.
c. Let existingDescriptor be Receiver.[[GetOwnProperty]](P).
d. ReturnIfAbrupt(existingDescriptor).
e. If existingDescriptor is not undefined, then
i. If IsAccessorDescriptor(existingDescriptor) is true, return false.
...
---*/
var receiver = {};
var fn = function() {};
Object.defineProperty(receiver, 'p', {
set: fn
});
var o1 = {};
var result = Reflect.set(o1, 'p', 42, receiver);
assert.sameValue(
result, false,
'target has no own `p` and receiver.p has an accessor descriptor'
);
assert.sameValue(
Object.getOwnPropertyDescriptor(receiver, 'p').set, fn,
'receiver.p is not changed'
);
assert.sameValue(o1.hasOwnProperty('p'), false, 'target.p is not set');
var o2 = {p: 43};
result = Reflect.set(o2, 'p', 42, receiver);
assert.sameValue(
result, false,
'target.p has a data descriptor and receiver.p has an accessor descriptor'
);
assert.sameValue(
Object.getOwnPropertyDescriptor(receiver, 'p').set, fn,
'receiver.p is not changed'
);
assert.sameValue(o2.p, 43, 'target.p is not changed');
|
